Question about 1988 Chevrolet Blazer

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Hard starting after warming up and Driving

After driving my 2.8 for any amount of time it takes to warm up to operating temp, upon restarting, it will run for about 20 seconds then shut off. I either have to wait for an hour or so OR take 5 minutes of sawing on the starter to FINALLY get it to start. It acts as if it has no fuel in the injectors. OR that after stopping, the fuel drains back in to the lines. I'm not sure if it's the pressure regulator or some sort of valve? that's stuck open. After it sputters back to life, it runs normally! NO hesitation, stumbling, missing or other abnormalities. The engine check light does not come on at any time. Any suggestions?

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  • 9 Answers

Sounds like a bad ignition control module..since you said a 2.8; it sounds like a GM product; when they start to get age on them; the heat starts to affect them..sometimes until they cool off a car will act like it has no battery in the car at all. Check to see if the module is the problem; depending where the location of the module is; you could probably do this yourself; but make sure the cables are off the battery before you try anything electrial

Posted on Apr 08, 2017

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Posted on Jan 02, 2017

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SOURCE: my car hesitates a nd stumbles upon acceleration

Not to be rude, but, if you already know what's broke, fix it!!! Usually, if it's just the plastic line, just slip a piece of rubber hose over it. I use fish tank air hose for this, sometimes securing both ends with thin tie-wire.

Posted on Dec 22, 2008

  • 74 Answers

SOURCE: 1998 Chevy tahoe Hard to start when cold

replace your MAP sensor(manifold absolute pressure) the map sensor is the computer for your fuel pressure regulator telling how much pressure. Unless your tahoe runs like **** going up hill than it inevitably your fuel pump

Posted on Feb 17, 2009

Dr-Custom
  • 216 Answers

SOURCE: hard to start when warmed up

It sounds like you are on the right path here,but I would take the truck back to perform the fuel pressure test again and this time let the truck sit for 20-30 minutes with the fuel pressure guage on it and look for how much the pressure drops in that amount of time.The pressure should not drop over 5-10 psi in the 30 minutes or so. If it does then I would suspect the pressure loss to be at the fuel injector (CFI) if this truck is a vortec equipped 4.3L. The regulator is internal of the upper intake plenum and you will have to remove the upper intake plenum to inspect it. If, when you get the upper intake plenum off, you find residual fuel around the regulator or any of the hoses or poppet injectors replace as necessary. This is a very common problem for these vehicles with high mileage. Parts are available at the local auto parts store.

Hope this helps.

Posted on Apr 20, 2009

  • 58 Answers

SOURCE: i have a 1996 chevy cavalier that

Without seing it, this is impossible to answer. Get to know a good Mechanic.

Posted on Oct 06, 2009

  • 14036 Answers

SOURCE: Engine balks and quits after reaching normal operating temp.

ENGINE SOUND LIKE ITS OUT OF TIME.BUT ALSO HAS LEAN FUEL MIXTURE.CHANGE FUEL FILTER.THEN CHECK FUEL PRESSURE.IT SHOULD BE 9 - 13 PSI TBI INJECTION AND 55 - 61 PSI MFI INJECTION.

Posted on Mar 09, 2010

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