car runs but then it wont

1989 CHEVROLET CELEBRITY
105,000 MILES • 2.5L • 4 CYL • AUTOMATIC
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JOSE69420
  • MEMBER
  • 1 POST
I have a 1989 Chevrolet celebrity and it starts and runs one day but the next day it wont start or run. I went to the shop already but my mechanic cant seem to fix the problem because it still runs and starts for one day but the next day it wont want to. I have replaced the fuel pump in the past and it didnt seem to be the problem so .now i dont know what to do or how to fix it because i dont know the problem.
Mar 31, 2014 at 6:39 AM
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JDL
  • ✓Experienced Mechanic
  • 16,098 POSTS
Intermittent issues can be a pain. YOU have to do testing when the problem is ongoing. I can help with some testing, but, you have to do the testing.

When the problem occurs, if it cranks good but won't start, have a helper crank it, while you visually check for spark at the spark plugs. If you have spark everywhere, use a gage and check for proper fuel pressure.

Your mechanic is correct, if the vehicle is running ok when he checks it and no trouble codes. Then, he probably won't be able to find anything.

My first thought on something like this, when the problem is ongoing, is there an rpm signal?
Mar 31, 2014 at 7:05 AM
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