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1997 Buick Skylark wont start when hot

Tiny
BIG BUBBA 2010
  • MEMBER
  • 1997 BUICK SKYLARK
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 119,000 MILES
I am looking for some help. It is my grandma`s car a 1997 buick skylark it will crank and run fine until it gets hot then it will shut off and won't start for like 1-2 hours later I have already replaced the fuel pressure regulator and that didn't help so we then discoverd that the fan wasn't working so we changed that and it came on when we first crancked it up and the second time we did we didn't hear the fan and we tried it today and didnt hear it again and we timed it it ran 17:00 the first time 13:00 the second time and 17:00 the third time and we got a code reader and it says p0300 which in the book that came with it said random/multiple cylinder misfire detected
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Saturday, February 13th, 2010 AT 3:04 PM

1 Reply

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Hi, when it refuses to start, have a helper crank it, while you check for spark at the plugs. If you have spark everywhere, use a gage and check fuel pressure. Some of the national brand autostores used to loan out a fuel pressure gage.

To check for spark, you can pull a plug boot, stick known good plug or tester in the boot, ground metal part of tester to metal part of engine, watch for spark as engine is cranked.
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Saturday, February 13th, 2010 AT 3:10 PM

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