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I have a 1988 Chevy corvette that will not stay running. When it starts it only runs for about 2 minutes and shuts off. If u goose the throttle its starts shuttering like a mass air would do. I've replaced the computer and the mass air and its still doing the same thing. It has 38 lbs of fuel pressure wen running and it has 42 on start up with vac line hooked up. With it undone it has 41 lbs of pressure. Please someonehelp me .

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  • 29 Answers

It's sounds like a massive air leak. If your fuel pump is working then it should only be a leak. We had the same problem. Replace the air filter. It fixed us right up.

Posted on May 06, 2013

  • Lenny McFadden Jr. May 06, 2013

    All ready put a new one in it. Still doin the same thing.

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Posted on Jan 02, 2017

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SOURCE: buick lesabre nightmare

Need to get a scan tool and look at the data stream while it is running for alot more info.Also any trouble codes.Sounds like initially,the engine isn't getting any fuel.I would have a pressure gauge connected to the fuel rail on the engine,so i could monitor the fuel pressure while all this is going on.Items to look at on the data stream would be timing,what timing is the PCM commanding for the engine.Also,have you checked for continuos power feed to the coils during this no start condition,and fire at the plugs while cranking.You could possibly still have spark,but maybe it is extremely weak?I have seen bad ignition switches cause weird problems before too.Many things power up through the ignition switch,just a thought.Have also seen bad PCM's cause strange problems..38 volts is a little on the low side for GM.Usually see those at,at least .50 and up,and rise steadily while pressing the throttle,up to just under 5.0 volts.Potentiometer with 5 volt supply.Vacuum leak can be checked with engine running at a steady idle speed,spray brake cleaner all around the intake manifold and listen for engine speed change.

Posted on Jul 31, 2008

  • 255 Answers

SOURCE: buick lesabre no start

Hi you have replaced allmost everything ,(try fuel pump relay)

Posted on Aug 18, 2008

  • 1 Answer

SOURCE: 1987 chevy astro van

10 lbs not near enough need to replace pump strainer and fuel filter

Posted on Dec 23, 2008

SOURCE: 1988 ranger 2.9 no fuel pressure new pump

check the pulse on the injector wire with a noid lite or a meter. If no flash then you most likely need a computer. Its called a quad driver in the PCM thats fried. You may have a shorted component that caused it to fail.

Since you say it will run if you add fuel manually I don't suspect the crank sensor because you have spark.

Posted on Aug 15, 2009

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  • 409 Answers

SOURCE: 1988 silverado, tbi 350 has 12 psi fuel pressure,

Fuel pressure is a little low, check the pressure regulator, and the fuel filter

Posted on Mar 09, 2010

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