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| TommyT-Bone | 1990 Fuel Pump Relay Location | ||
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Chair-man of the bored
 
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I have a 90 and a 91 but my FSM is for a 91. Can somebody please point me to the location of the fuel pump relay on a 1990 coupe, 6 sp, L98. In the 91 the fsm says it's on the passenger side under the dash. Where is it on the 90? I dropped the passenger side panel but I didn't see it. Maybe I wasn't looking in the right place. Thanks.
Tommy T. |
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Posted on: 2009/6/28 19:32
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| BillH | Re: 1990 Fuel Pump Relay Location | ||
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The Stig Moderator
 
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Aren't they under there close to the center (left side of the pass dash)? On my 92 there's a bank of 5 relays there.
I thought someone said the 90/91's where there too. |
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Posted on: 2009/6/28 19:59
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_________________
Every man dies but not every man lives. |
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| TommyT-Bone | Re: 1990 Fuel Pump Relay Location | ||
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Chair-man of the bored
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I dropped the panel again. I'm going to search again a little more aggressively. I'll check back shortly.
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Posted on: 2009/6/28 20:11
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Transfer
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| TommyT-Bone | Re: 1990 Fuel Pump Relay Location | ||
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Chair-man of the bored
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Left side about 1 inch up on the dash panel. Thanks Bill.
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Posted on: 2009/6/28 20:24
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Transfer
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| bogus | Re: 1990 Fuel Pump Relay Location | ||
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Grand Imperial Pooh-Bah
 
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Cool. I am with Bill on this one, too. I thought when the dash was redone in 1990, that the relays were all moved under the left knee pad.
Glad you found'm!!! |
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Posted on: 2009/6/28 20:41
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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Transfer
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| TommyT-Bone | Re: 1990 Fuel Pump Relay Location | ||
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Chair-man of the bored
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But the problem continues. No fuel rail charge . No fuel to the injectors.
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Posted on: 2009/6/28 21:40
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Transfer
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| bogus | Re: 1990 Fuel Pump Relay Location | ||
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Grand Imperial Pooh-Bah
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does the pump fire?
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Posted on: 2009/6/28 21:48
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_________________
The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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Transfer
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| TommyT-Bone | Re: 1990 Fuel Pump Relay Location | ||
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Chair-man of the bored
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I'm working in that direction. Fuse is OK and changing the fuel pump relay did nothing. At this point, I know it has spark, the fuel rail will not charge and the engine will sputter and die on first attempt after sitting awhile. The oil pressure guage does climb on start attempts.
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Posted on: 2009/6/28 22:02
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Transfer
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| bogus | Re: 1990 Fuel Pump Relay Location | ||
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Grand Imperial Pooh-Bah
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hm... interesting...
What is the age/condition of the fuel filter? just curious. Do you have 12v at the pump harness? |
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Posted on: 2009/6/28 22:20
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_________________
The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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Transfer
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| TommyT-Bone | Re: 1990 Fuel Pump Relay Location | ||
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Chair-man of the bored
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Fuel filter is 6 months old less than 500 miles. I'll have to check the voltage at the harness tomorrow.
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Posted on: 2009/6/28 23:28
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Transfer
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| vetteoz | Re: 1990 Fuel Pump Relay Location | ||
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Senior Guru
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Pull the codes
'90 has the lovely CCM and SIR (airbag ) systems that have to send a data signal to the ECM to fire the injectors (and run pump from memory). |
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Posted on: 2009/6/29 0:45
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Transfer
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| bogus | Re: 1990 Fuel Pump Relay Location | ||
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Grand Imperial Pooh-Bah
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CCM is the VATS... it would stop the car from cranking, too.
SIR has little or nothing to do with starting. If it does, then I have misread that section... so I guess I will dbl check it...  yea, I just checked it. SIR circuit diagram show nothing to connect it to the VATS or starting process. |
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Posted on: 2009/6/29 1:05
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_________________
The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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Transfer
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| monsterstoys | Re: 1990 Fuel Pump Relay Location | ||
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Guru Newb
 
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Did you ever SOLVE the problem of it NOT STARTING when it was warmed Up ? My 90 runs rough & sputters when warmed up.
I changed ALL sensors and ECM , and the car still will not start when it is warmed up. It has Spark , NEW Fuel pump but it seems like theres no fuel. The filter is clean & good with NO obstructions. PLEASE HELP !!!!!! |
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Posted on: 2010/10/16 4:31
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Transfer
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| monsterstoys | Re: 1990 Fuel Pump Relay Location | ||
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Guru Newb
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Posted on: 2010/10/16 4:35
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Transfer
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| TommyT-Bone | Re: 1990 Fuel Pump Relay Location | ||
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Chair-man of the bored
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Quote:
started a new thread |
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Posted on: 2010/10/16 9:59
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Transfer
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| bogus | Re: 1990 Fuel Pump Relay Location | ||
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Grand Imperial Pooh-Bah
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I must add... I was WRONG on the SIR... if the fuse is blown, it will kill power to the ECM.
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Posted on: 2010/10/16 15:39
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_________________
The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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Transfer
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