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josephf31 | No start, no fuel?, maybe bad pump how to test? | ||
Senior Guru
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I think my fuel pump may have died, car cranks, will start with starting fluid but will not stay running. Car started fine a few weeks ago, went to move it a few days ago and nothing. I have checked all the fuses, they are all good, if I remember correctly, when the ignition is in the ON position, shouldn't I hear the fuel pump going? Now nothing but silence.
What it the quickest/easiest/best way to test? Or is there something else I should be looking at? thx |
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Posted on: 2014/5/15 23:52
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2002 Magnetic Red C5 6 spd LS1 convertible |
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bogus | Re: No start, no fuel?, maybe bad pump how to test? | ||
Grand Imperial Pooh-Bah
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you need a fuel pressure gauge.
there is a port that looks much like a tire valve - because it is - on the right side fuel rail, between #6 and #8 cylinders (or so). remove cap, install gauge, crank, check pressure. Should be about 43 lbs. Could also be a failed fuel filter. |
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Posted on: 2014/5/16 0:05
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josephf31 | Re: No start, no fuel?, maybe bad pump how to test? | ||
Senior Guru
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I'll put the fuel gauge on tomorrow; how would I know if it's a bad filter as opposed to the pump?
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Posted on: 2014/5/16 0:23
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Matatk | Re: No start, no fuel?, maybe bad pump how to test? | ||
Webmaster
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When you first turn the key on, you should hear the pump prime for approximately 2 seconds. If you don't hear it at all there is a chance that a) the relay is bad b) the pump is bad c) there is a wiring/system issue. "A" can be overcome by cranking the engine longer because once the oil pressure reaches 4 psi it will power the pump. You can test the pump by jumpering a hot wire from the battery directly to aldl port "g" which is the fuel pump circuit...see if it runs.
Like Andy said, attach the fuel pressure gauge to the Schrader valve and check the pressure. If you need a new pump, replace the filter and sock at the same time as maintenance items. The pump is relatively easy to change. |
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Posted on: 2014/5/16 2:43
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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bogus | Re: No start, no fuel?, maybe bad pump how to test? | ||
Grand Imperial Pooh-Bah
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And get the WIX fuel filter.
Also, Lingenfelter sells the best fuel pump at a great price. It's the Racetronix, but they just have a great price and customer service and I do like to help the smaller vendors out (vs say, Summit?). |
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Posted on: 2014/5/16 17:28
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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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Matatk | Re: No start, no fuel?, maybe bad pump how to test? | ||
Webmaster
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Just order it direct from racetronix.com it's a walbro pump with a nice wiring harness and install kit
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Posted on: 2014/5/17 1:27
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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josephf31 | Re: No start, no fuel?, maybe bad pump how to test? | ||
Senior Guru
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Got her running again...hooked up the fuel pressure gauge, cranked it for a bit; zero. I jumpered to the fuel gauge circuit, nothing. So I took apart the fuel pump assembly and jumpered directly to the pump and it ran. Found some crud on the intake inside the sock, cleaned it out, check all the wiring, put her back together and she fired right up. So I'm guessing it was either the crud in the intake (I had the tank down real low) and/or something electrical not making contact but it's running like a champ now, thanks to everyone for all of your help!
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Posted on: 2014/5/25 22:28
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Ultraman | Re: No start, no fuel?, maybe bad pump how to test? | ||
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Is that the original pump? I would just go ahead and change it out if its got some years on it.....but that's just me.....
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Posted on: 2014/5/26 0:14
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josephf31 | Re: No start, no fuel?, maybe bad pump how to test? | ||
Senior Guru
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Not the original in fact I think it's a Racetronix I bought a few years back which I why I would have been surprised if it was a bad pump...
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Posted on: 2014/5/26 2:22
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2002 Magnetic Red C5 6 spd LS1 convertible |
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Matatk | Re: No start, no fuel?, maybe bad pump how to test? | ||
Webmaster
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Glad you got it fixed!
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Posted on: 2014/5/26 3:10
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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bogus | Re: No start, no fuel?, maybe bad pump how to test? | ||
Grand Imperial Pooh-Bah
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Good fix!!! I am sure it was electrical... if the sock was the problem, it would not have kept it from running.
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Posted on: 2014/5/26 19:09
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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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