Question about Oldsmobile 88

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I have a 1991 olds 88 starts right in the mornings then every once in a while twice this month, after sitting nine hours cranks but wouldn't start. Then next morning started right up. had it to the mechanic he said he couldn't find anything. Help please

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  • mary_issler Sep 28, 2009

    The mechanic came to house because car still would not start, crank but not turn over. He put the gauge on to test fuel while cranking it read 45. He also had a tester hooked up to test spark. When he first cranked it no light on spark tester. He then made sure everything hooked up tried again at first no light then just faint flicker then it lit up but didn't start. I got in cranked it a couple of times then it started. He said he had to do some digging. Still don't know. Is fuel pressure Ok? He said may be crank sensor or ignition module.but my car doesn't stall.

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First guy is right but my experince says yo have a defective fuel pump.

Posted on Sep 28, 2009

  • Bruce Hathcock Oct 18, 2009

    add a comment to this did you find out the problem? if not post back and I will do some digging, sounds like you gut a guy that can get it done. However the noid lights really **** Unless yuo own a good one they can give you a false positive. Let me know and thanks for rating.

  • Bruce Hathcock Oct 18, 2009

    @slatrom some problems may not be found but a good mechanic will know how to pin out every device on the system and should be able to find it, I have had some that kicked me in the tail but your information did not help the coustmer so wanted to help you to inprove your skills, this is not a put down, but have seen so many mechanics who could not find the problem and I always get the hardest they say if I can't fix it no one can.

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You cannot find this problem unless it is occurring.

When it happens you need to check for spark and fuel pressure. If you have spark and fuel pressure you need to check for injector signal.

If those things check OK you need to test the temperature sensor (the one that tells the computer how warm the engine is) If this sensor is faulty the computer could be forcing a rich condition and flooding the engine.

There lots of things that can cause this problem, faulty wiring, computer, crank sensor, ignition module, etc. but you need to track down which system is causing the problem first.

Many of these things will not set a trouble code, but some of them will. Have your car scanned to see if something points to a faulty part or system.

Intermittent problems can be the most time consuming problems to repair. You cannot verify a problem or a repair, you can only guess until it becomes a hard failure.


Posted on Sep 28, 2009

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