93 Grand Prix 3.4 L

Tiny
MPIERCE
  • MEMBER
  • 1993 PONTIAC GRAND PRIX
My car was running really high lately. When it first started it would idle at about 2.5 to 3 grand. While driving it started to accelerate on its own then stalled out. Now she wont start. She cranks. The smell of gas is present. She just wont roll over. Please help if possible
Thursday, October 25th, 2007 AT 11:08 PM

1 Reply

Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
You may have an intake manifold gasket that started leaking and blew wide open. Essentially it causes a vacuum leak in this case (if this is what happened) giving the high idle. Sometimes you can have an oil or coolant consumption problem of coolant infiltrating the crankcase as well. Granted this is more typical of newer 3.4s than yours. Check for a massive vacuum leak regardless to start of with.
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Friday, October 26th, 2007 AT 7:36 AM

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