What is this? [Forums - C4 Technical]

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Weavsvet	What is this?	#1
Senior Guru 446 Posts Member since: 2008/9/16 9:08	Is it the fuel pump check valve?
	Posted on: 2010/7/14 19:46
	_________________ 1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage
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BillH	Re: What is this?	#2
The Stig Moderator Reno 22702 Posts Member since: 2007/12/25 0:00	Are there connections to that, Mike, besides the fuel pump in and out? THIS IS a Guess, but it may be the connection to take vapor out abd to the vapor canister.
	Posted on: 2010/7/14 20:13
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Weavsvet	Re: What is this?	#3
Senior Guru 446 Posts Member since: 2008/9/16 9:08	No no connections except to one of the hoses on top. You're probably correct Bill. Probably some kind of oneway valve maybe. If it's bad could it cause a loss in fuel pressure you think? I think it is the only thing left that I have not checked to find out why my FP is dropping.
	Posted on: 2010/7/14 20:17
	_________________ 1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage
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MK 82	Re: What is this?	#4
Senior Guru Palm Beach Gardens, FL 439 Posts Member since: 2007/12/28 0:00	Rollover protection against leaks.
	Posted on: 2010/7/14 20:27
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Weavsvet	Re: What is this?	#5
Senior Guru 446 Posts Member since: 2008/9/16 9:08	So it probably is part of the evap system then. Oh well. I'll keep looking. Thanks Eddie
	Posted on: 2010/7/14 20:29
	_________________ 1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage
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Weavsvet	Re: What is this?	#6
Senior Guru 446 Posts Member since: 2008/9/16 9:08	Where is the fuel pump check valve, in the pump itself?
	Posted on: 2010/7/14 20:32
	_________________ 1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage
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MK 82	Re: What is this?	#7
Senior Guru Palm Beach Gardens, FL 439 Posts Member since: 2007/12/28 0:00	Yes. Did I hear you say in another thread that you made some alteration to the wiring in one of your O2 pigtails to lengthen it?
	Posted on: 2010/7/14 21:26
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Weavsvet	Re: What is this?	#8
Senior Guru 446 Posts Member since: 2008/9/16 9:08	Quote: MK 82 wrote: Yes. Did I hear you say in another thread that you made some alteration to the wiring in one of your O2 pigtails to lengthen it? Just a jumper. I removed it.
	Posted on: 2010/7/14 21:43
	_________________ 1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage
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Steve40th	Re: What is this?	#9
Elite Guru 1114 Posts Member since: 2005/12/20 0:00	your fuel pressure with hose, vacuum hose, off should be 43.5 at idle.
	Posted on: 2010/7/14 22:10
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Weavsvet	Re: What is this?	#10
Senior Guru 446 Posts Member since: 2008/9/16 9:08	Quote: Steve40th wrote: your fuel pressure with hose, vacuum hose, off should be 43.5 at idle. I'll change it then.
	Posted on: 2010/7/14 22:15
	_________________ 1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage
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vis_croceus	Re: What is this?	#11
Senior Guru VA 260 Posts Member since: 2007/12/30 0:00	From your same thread on the other forum: Quote: I have a major lean condition....glowing cat problem like it's dumping fuel...Fuel trims are near perfect at 128 both LT and ST.
	Posted on: 2010/7/14 22:35
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Weavsvet	Re: What is this?	#12
Senior Guru 446 Posts Member since: 2008/9/16 9:08	Quote: vis_croceus wrote: From your same thread on the other forum: Quote: I have a major lean condition....glowing cat problem like it's dumping fuel...Fuel trims are near perfect at 128 both LT and ST. That's what the Tech 1 says. I'm just passing it along. What else could cause cats to glow. They're brand new?
	Posted on: 2010/7/14 22:37
	_________________ 1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage
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Weavsvet	Re: What is this?	#13
Senior Guru 446 Posts Member since: 2008/9/16 9:08	Here's the post that was in. Ok, here is the spill on the rest of it and of course knowing me and this car it's some kind of weird s**t that doesn't seem to happen to anyone else.......... I have a major lean condition. I changed out the SW LT's for some TPIS headers a week ago. Every since then I have had this glowing cat problem like it's dumping fuel. Mainly of the left cat but a little glowing on the right also. Fuel trims are near perfect at 128 both LT and ST. If there is a exhaust leak I can't find it or hear it. I don't belive this started with this header swap. I think it's always been there I just never looked at the cats before while it was idling. I think it's something in the tune but tuner says otherwise. Mechanical he says. I changed out the PCMs just to see if anything changed and it did. In the PCM he tuned the 02mv would not move at idle. Usually below 100mv on both sides. If I reved it a little they started moving but bank 1 was always behind bank 2. So I put another PCM in and the 02 mv is hauling butt at idle. Still glowing cats though and fuel trims are nuts on the LT side. So I'm looking for anything in th fuel system that may cause it to dump fuel. Just to eliminate a mechanical issue. Which brings me to this question....... What should a vacuum gauge do at idle if the motor is revved slightly?
	Posted on: 2010/7/14 22:39
	_________________ 1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage
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Steve40th	Re: What is this?	#14
Elite Guru 1114 Posts Member since: 2005/12/20 0:00	Quote: Weavsvet wrote: Quote: Steve40th wrote: your fuel pressure with hose, vacuum hose, off should be 43.5 at idle. I'll change it then. The tune was set up for the 43.5 psi, if it is lower, it will not be tuned correctly. Give it a shot and see what happens
	Posted on: 2010/7/14 22:54
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Weavsvet	Re: What is this?	#15
Senior Guru 446 Posts Member since: 2008/9/16 9:08	Quote: Steve40th wrote: Quote: Weavsvet wrote: Quote: Steve40th wrote: your fuel pressure with hose, vacuum hose, off should be 43.5 at idle. I'll change it then. The tune was set up for the 43.5 psi, if it is lower, it will not be tuned correctly. Give it a shot and see what happens Well I be damned, that helped. Took it till 188 to really start glowing and it kind of held it's own at a slight glow towards the rear of the cat rather than the whole cat glowing like it was. My FP gauge runs in 2's so I can't get it exact I guess. May raise it slightly just to see if it stops all together. Thanks so much Steve!!!!!!
	Posted on: 2010/7/14 23:38
	_________________ 1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage
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Steve40th	Re: What is this?	#16
Elite Guru 1114 Posts Member since: 2005/12/20 0:00	I would let Solomon know what happened. he may be compensating in the tune for the issues happening.
	Posted on: 2010/7/14 23:45
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Weavsvet	Re: What is this?	#17
Senior Guru 446 Posts Member since: 2008/9/16 9:08	Quote: Steve40th wrote: I would let Solomon know what happened. he may be compensating in the tune for the issues happening. Just did, thanks again!
	Posted on: 2010/7/14 23:46
	_________________ 1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage
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Steve40th	Re: What is this?	#18
Elite Guru 1114 Posts Member since: 2005/12/20 0:00	I wonder if your BLMs are locked in a very small window? Have you seen 108 BLMs, or 150 BLMs at all during your datalloging??
	Posted on: 2010/7/14 23:49
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Weavsvet	Re: What is this?	#19
Senior Guru 446 Posts Member since: 2008/9/16 9:08	Quote: Steve40th wrote: I wonder if your BLMs are locked in a very small window? Have you seen 108 BLMs, or 150 BLMs at all during your datalloging?? Not with this PCM he tuned, no.
	Posted on: 2010/7/14 23:51
	_________________ 1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage
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Steve40th	Re: What is this?	#20
Elite Guru 1114 Posts Member since: 2005/12/20 0:00	Quote: Weavsvet wrote: Quote: Steve40th wrote: I wonder if your BLMs are locked in a very small window? Have you seen 108 BLMs, or 150 BLMs at all during your datalloging?? Not with this PCM he tuned, no. HHMMM. Wierd. What have you seen as far as BLMs
	Posted on: 2010/7/14 23:52
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MK 82	Re: What is this?	#21
Senior Guru Palm Beach Gardens, FL 439 Posts Member since: 2007/12/28 0:00	Quote: Weavsvet wrote: Quote: MK 82 wrote: Yes. Did I hear you say in another thread that you made some alteration to the wiring in one of your O2 pigtails to lengthen it? Just a jumper. I removed it. What do you mean by jumper? Did you cut or splice the wires between the plug and the sensor?
	Posted on: 2010/7/15 0:01
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Weavsvet	Re: What is this?	#22
Senior Guru 446 Posts Member since: 2008/9/16 9:08	Quote: MK 82 wrote: Quote: Weavsvet wrote: Quote: MK 82 wrote: Yes. Did I hear you say in another thread that you made some alteration to the wiring in one of your O2 pigtails to lengthen it? Just a jumper. I removed it. What do you mean by jumper? Did you cut or splice the wires between the plug and the sensor? No cutting.....I put a 12" jumper/extension in between the 02 plug and the 02 itself to keep the 02 wires off of the headers.
	Posted on: 2010/7/15 0:03
	_________________ 1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage
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Weavsvet	Re: What is this?	#23
Senior Guru 446 Posts Member since: 2008/9/16 9:08	Quote: Steve40th wrote: Quote: Weavsvet wrote: Quote: Steve40th wrote: I wonder if your BLMs are locked in a very small window? Have you seen 108 BLMs, or 150 BLMs at all during your datalloging?? Not with this PCM he tuned, no. HHMMM. Wierd. What have you seen as far as BLMs With the other PCM I put in temporally LTFT was like +18% on bank 1. +9% on back 2. But that PCM did not have the correct tune so matters not.
	Posted on: 2010/7/15 0:07
	_________________ 1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage
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Weavsvet	Re: What is this?	#24
Senior Guru 446 Posts Member since: 2008/9/16 9:08	Current BLMs are almost perfect as I mentioned. STFT may have been +1% or somethings like that. LTFT was dead on 128 on both sides.
	Posted on: 2010/7/15 0:09
	_________________ 1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage
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Steve40th	Re: What is this?	#25
Elite Guru 1114 Posts Member since: 2005/12/20 0:00	Quote: Weavsvet wrote: Current BLMs are almost perfect as I mentioned. STFT may have been +1% or somethings like that. LTFT was dead on 128 on both sides. when you changed the fuel pressure, did your STFT change at all?
	Posted on: 2010/7/15 0:10
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Weavsvet	Re: What is this?	#26
Senior Guru 446 Posts Member since: 2008/9/16 9:08	Quote: Steve40th wrote: Quote: Weavsvet wrote: Current BLMs are almost perfect as I mentioned. STFT may have been +1% or somethings like that. LTFT was dead on 128 on both sides. when you changed the fuel pressure, did your STFT change at all? I I haven't checked. I was to excited that the cat wasn't glowing as bad. I can check though.
	Posted on: 2010/7/15 0:12
	_________________ 1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage
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Weavsvet	Re: What is this?	#27
Senior Guru 446 Posts Member since: 2008/9/16 9:08	Quote: Steve40th wrote: Quote: Weavsvet wrote: Current BLMs are almost perfect as I mentioned. STFT may have been +1% or somethings like that. LTFT was dead on 128 on both sides. when you changed the fuel pressure, did your STFT change at all? STFT is fixed at +2% 130 on both banks at idle. It does not move unless I hit the throttle. LTFT is fixed at 128 both banks.
	Posted on: 2010/7/15 0:37
	_________________ 1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage
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Steve40th	Re: What is this?	#28
Elite Guru 1114 Posts Member since: 2005/12/20 0:00	That is interesting. I would, just for shits and giggles, change the fuel pressure up and down to see if these numbers change during engine running.
	Posted on: 2010/7/15 1:15
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MK 82	Re: What is this?	#29
Senior Guru Palm Beach Gardens, FL 439 Posts Member since: 2007/12/28 0:00	The point I am after is that O2 sensors require air as a reference in order to give a valid reading. Believe it or not, the air comes from the wires. I know, sounds wierd. That's why you can't cut or alter the wires in the pigtail. Any splices will affect it's operation. Eddie Quote: Weavsvet wrote: Quote: MK 82 wrote: Quote: Weavsvet wrote: Quote: MK 82 wrote: Yes. Did I hear you say in another thread that you made some alteration to the wiring in one of your O2 pigtails to lengthen it? Just a jumper. I removed it. What do you mean by jumper? Did you cut or splice the wires between the plug and the sensor? No cutting.....I put a 12" jumper/extension in between the 02 plug and the 02 itself to keep the 02 wires off of the headers.
	Posted on: 2010/7/15 2:08
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Weavsvet	Re: What is this?	#30
Senior Guru 446 Posts Member since: 2008/9/16 9:08	Quote: MK 82 wrote: The point I am after is that O2 sensors require air as a reference in order to give a valid reading. Believe it or not, the air comes from the wires. I know, sounds wierd. That's why you can't cut or alter the wires in the pigtail. Any splices will affect it's operation. Eddie Quote: Weavsvet wrote: Quote: MK 82 wrote: Quote: Weavsvet wrote: Quote: MK 82 wrote: Yes. Did I hear you say in another thread that you made some alteration to the wiring in one of your O2 pigtails to lengthen it? Just a jumper. I removed it. What do you mean by jumper? Did you cut or splice the wires between the plug and the sensor? And I'm glad you brought it up because I never got an answer to this question I asked a while back. No cutting.....I put a 12" jumper/extension in between the 02 plug and the 02 itself to keep the 02 wires off of the headers. And I'm glad you brought it up because I never got an answer to this question I asked a while back. In order to keep the wires from the 02's from being burnt on the headers I wrapped them in heat shield tape. Not real tight but they are shielded sort of. Question is: Will this affect the readings of the 02's if they use the wires like you say?
	Posted on: 2010/7/15 7:05
	_________________ 1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage
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MK 82	Re: What is this?	#31
Senior Guru Palm Beach Gardens, FL 439 Posts Member since: 2007/12/28 0:00	I doubt it.
	Posted on: 2010/7/15 16:15
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flyboy	Re: What is this?	#32
Elite Guru Westmont, Il. 2632 Posts Member since: 2008/9/28 12:47	Quote: Weavsvet wrote: Quote: MK 82 wrote: The point I am after is that O2 sensors require air as a reference in order to give a valid reading. Believe it or not, the air comes from the wires. I know, sounds wierd. That's why you can't cut or alter the wires in the pigtail. Any splices will affect it's operation. Eddie Quote: Weavsvet wrote: Quote: MK 82 wrote: Quote: Weavsvet wrote: Quote: MK 82 wrote: Yes. Did I hear you say in another thread that you made some alteration to the wiring in one of your O2 pigtails to lengthen it? Just a jumper. I removed it. What do you mean by jumper? Did you cut or splice the wires between the plug and the sensor? And I'm glad you brought it up because I never got an answer to this question I asked a while back. No cutting.....I put a 12" jumper/extension in between the 02 plug and the 02 itself to keep the 02 wires off of the headers. And I'm glad you brought it up because I never got an answer to this question I asked a while back. In order to keep the wires from the 02's from being burnt on the headers I wrapped them in heat shield tape. Not real tight but they are shielded sort of. Question is: Will this affect the readings of the 02's if they use the wires like you say? I ran mine inside some thermoflex heat shield tubing and my mechanic said not to worry.
	Posted on: 2010/7/15 17:44

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Weavsvet	Re: What is this?	#33
Senior Guru 446 Posts Member since: 2008/9/16 9:08	Quote: flyboy wrote: Quote: Weavsvet wrote: Quote: MK 82 wrote: The point I am after is that O2 sensors require air as a reference in order to give a valid reading. Believe it or not, the air comes from the wires. I know, sounds wierd. That's why you can't cut or alter the wires in the pigtail. Any splices will affect it's operation. Eddie Quote: Weavsvet wrote: Quote: MK 82 wrote: Quote: Weavsvet wrote: Quote: MK 82 wrote: Yes. Did I hear you say in another thread that you made some alteration to the wiring in one of your O2 pigtails to lengthen it? Just a jumper. I removed it. What do you mean by jumper? Did you cut or splice the wires between the plug and the sensor? And I'm glad you brought it up because I never got an answer to this question I asked a while back. No cutting.....I put a 12" jumper/extension in between the 02 plug and the 02 itself to keep the 02 wires off of the headers. And I'm glad you brought it up because I never got an answer to this question I asked a while back. In order to keep the wires from the 02's from being burnt on the headers I wrapped them in heat shield tape. Not real tight but they are shielded sort of. Question is: Will this affect the readings of the 02's if they use the wires like you say? I ran mine inside some thermoflex heat shield tubing and my mechanic said not to worry. Alrighty then, something I don't have to change. I'm about half way on changing intakes. Having to port for the 58mm. Which I may not even need when I'm done but it'll be there anyway. Takes a little while. On hole down and one to go.
	Posted on: 2010/7/15 18:10
	_________________ 1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage
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Weavsvet	Re: What is this?	#34
Senior Guru 446 Posts Member since: 2008/9/16 9:08	Guys I'm about to give up here and it takes a lot for me to do that! I took off the AirGap intake and put the ported LT1 on there. Now I have LTFT numbers that are nuts! Bank 1 is something like +18@142 and bank 2 is about right at -1 or 127. Short term are moving between pluses and minues but not much. This spells intake leak or maybe exhaust leak but I can't find any. I removed the LT1 again and did everything in my power to seal the thing. No dice, still crazy fuel trims. The weird part is they level out to about normal when the engine is revved to 2000rpm and held there. On top of this I broke a wire in TPS plug and had to order a pigtail and it won't be here until in the morning. On top of all of this I guess I have a blow by problem. The Airgap no longer than it was on there has a good amount of oil in it or at least stains like it was in there. I have a small catch can so I looked in it and it had about 1 1/2oz. in it. I guess it would run fairly well with the blow by but I have no idea of what to do about these fuel trims. Just frustrating.........
	Posted on: 2010/7/16 19:06
	_________________ 1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage
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Weavsvet	Re: What is this?	#35
Senior Guru 446 Posts Member since: 2008/9/16 9:08	Guys I'm about to give up here and it takes a lot for me to do that! I took off the AirGap intake and put the ported LT1 on there. Now I have LTFT numbers that are nuts! Bank 1 is something like +18@142 and bank 2 is about right at -1 or 127. Short term are moving between pluses and minues but not much. This spells intake leak or maybe exhaust leak but I can't find any. I removed the LT1 again and did everything in my power to seal the thing. No dice, still crazy fuel trims. The weird part is they level out to about normal when the engine is revved to 2000rpm and held there. On top of this I broke a wire in TPS plug and had to order a pigtail and it won't be here until in the morning. On top of all of this I guess I have a blow by problem. The Airgap no longer than it was on there has a good amount of oil in it or at least stains like it was in there. I have a small catch can so I looked in it and it had about 1 1/2oz. in it. I guess it would run fairly well with the blow by but I have no idea of what to do about these fuel trims. Just frustrating.........
	Posted on: 2010/7/16 19:06
	_________________ 1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage
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Steve40th	Re: What is this?	#36
Elite Guru 1114 Posts Member since: 2005/12/20 0:00	Sounds like the intake gasket is not fitted right. Is this an LE ported intake? If you can put a straight edge on the manifold and see if it is straight, if you take it off again. Also, you can spray certain liquids onto the manifold area where it meets up with heads while its running. If the idle changes, you found your air leak.
	Posted on: 2010/7/16 21:24
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Weavsvet	Re: What is this?	#37
Senior Guru 446 Posts Member since: 2008/9/16 9:08	Quote: Steve40th wrote: Sounds like the intake gasket is not fitted right. Is this an LE ported intake? If you can put a straight edge on the manifold and see if it is straight, if you take it off again. Also, you can spray certain liquids onto the manifold area where it meets up with heads while its running. If the idle changes, you found your air leak. No, it was done by a local guy here. Tuner said I wasn't getting enough air, remember? I wonder if the Edelbrock was doing it to? Three sets of gaskets and two manifolds and leaks....Doesn't add up Steve. I'm going to fix that TPS plug in the morning and just drive it a while. I'm bout sick of the thing. Kind of like transmissions.......
	Posted on: 2010/7/16 21:28
	_________________ 1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage
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Steve40th	Re: What is this?	#38
Elite Guru 1114 Posts Member since: 2005/12/20 0:00	Quote: Weavsvet wrote: Quote: Steve40th wrote: Sounds like the intake gasket is not fitted right. Is this an LE ported intake? If you can put a straight edge on the manifold and see if it is straight, if you take it off again. Also, you can spray certain liquids onto the manifold area where it meets up with heads while its running. If the idle changes, you found your air leak. No, it was done by a local guy here. Tuner said I wasn't getting enough air, remember? I wonder if the Edelbrock was doing it to? Three sets of gaskets and two manifolds and leaks....Doesn't add up Steve. I'm going to fix that TPS plug in the morning and just drive it a while. I'm bout sick of the thing. Kind of like transmissions....... LOL, transmissions...
	Posted on: 2010/7/16 21:35
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Weavsvet	Re: What is this?	#39
Senior Guru 446 Posts Member since: 2008/9/16 9:08	Thought you'd like that..... I checked the Edelbrock and it does have a slight hump in the middle on Bank 1 side. The other side is flat. I installed the LT1 dry. Should I use some goop? If so, what can I use gas won't break down?
	Posted on: 2010/7/16 21:41
	_________________ 1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage
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Steve40th	Re: What is this?	#40
Elite Guru 1114 Posts Member since: 2005/12/20 0:00	Quote: Weavsvet wrote: Thought you'd like that..... I checked the Edelbrock and it does have a slight hump in the middle on Bank 1 side. The other side is flat. I installed the LT1 dry. Should I use some goop? If so, what can I use gas won't break down? On the front and rear is where I use The Rigth Stuff RTV, let it sit for a day before firing it up. Thats just me. I put a little over on to the part where the heads meet the manifold so the gasket seals a little better. If you put a good bead across the front and rear it will do this anyways. I never put any on the manifold to head section. I just use standard FelPro for LT1's. I dont knwo what the LT1 to AFR gasket recommended is off the top of my head, but there is always debate on this to get an LT1 manifold to seal up with the AFR heads.
	Posted on: 2010/7/16 21:44
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Weavsvet	Re: What is this?	#41
Senior Guru 446 Posts Member since: 2008/9/16 9:08	Quote: Steve40th wrote: [quote] Weavsvet wrote: but there is always debate on this to get an LT1 manifold to seal up with the AFR heads. Well I've missed this somewhere. I used the Right Stuff to but only on the china walls. In all I've used three different gasket numbers. It doesn't seem to matter which I use. I'm going to goo it and hope for the best. Got nothing to lose that's for sure.
	Posted on: 2010/7/16 21:49
	_________________ 1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage
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Steve40th	Re: What is this?	#42
Elite Guru 1114 Posts Member since: 2005/12/20 0:00	A regular LT1 intake will port match fine to the Comp Port 195 Elim's as well. The port opening is not very big at all. I used a Fel Pro 1284 to port match the last intake I did. The gasket port is almost perfect size wise - but you will have to raise the locating dowl holes (simply drill new ones) up .080 to put it in the right place for the AFR heads (as the AFR intake port is slightly raised more comparable to the LT4 V/S the LT1 heads). An LT4 intake requires even less port work. Simply squaring up and widning the stock intake port results in an almost perfect port match. Here again I just used a Fel Pro 1284 gasket with the locating dowl holes re-drilled to raise the gasket up .080. http://forums.corvetteforum.com/c4-te ... e-ported-to-afr-195s.html And this is a good thread too http://forums.corvetteforum.com/c4-te ... l-things-to-remember.html
	Posted on: 2010/7/16 22:15
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Weavsvet	Re: What is this?	#43
Senior Guru 446 Posts Member since: 2008/9/16 9:08	I may have lucked out overnight and the intake sealed better. I sprayed carb cleaner all around it and no increase in rpm. If it's leaking it's in the lifter valley. Fuel trims are within more of an acceptable range now. +9 on bank1(it was something like +18)but that may be a exhaust leak on a band clamp. Bank two which has never been really bad is within a 4% range either way. I'll check the exhaust out after it cools off some. If that doesn't fix it I guess I'll pull the intake again and seal it with Black RTV everywhere on the top portion of the intake gaskets let it sit overnight and dare it to leak this time. Damn, this is getting old fast! The gasket that is in there now is a AFR 6820. Plenty room around the ports and plenty of sealing surface so no need to mess with relocating the alignment pins.
	Posted on: 2010/7/17 13:19
	_________________ 1996 Corvette Coupe,AFR 195 street Eliminators,Edelbrock LT4 Air Gap intake manifold,9.5" 2800 stall,TPIS LT headers,Bullet 226/230.565.565/111 lsa cam,1.7 Scorpion rr's,EWP, X Pipe, Stock Exhaust,Elec.Cutouts,Dana 44/3.45, Tune by Wester's Garage
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