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1991 Pontiac Grand Prix Not running

Tiny
BIGREEN
  • MEMBER
  • 1991 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 95,000 MILES
We have tried everything we could think of. Car quit running on hiway, Hauled home, replaced fuel pump, computer, coil pak module board, There are no codes present. Engine will start up, run 4 to 5 seconds then die, sometimes will restart, sometimes will not. It has run long enough to back out of garage and pull on trailer then dies. Have taken to local garage, They have put on scanner and checked fuel pressure, everything shows good. Any suggestions?
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Tuesday, July 29th, 2008 AT 8:29 PM

1 Reply

Tiny
FEELGOOD71
  • MEMBER
  • 32 POSTS
Check the crank sensor
these are known to go on these engines

do not attempt to replace on your own take it to a qualified tech too replace it.

This is located at the back of the engine block and goes into the engine block. The sensor is probably swollen and cracked on the inside and the oil pan might need to come off to remove the sensor
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Tuesday, July 29th, 2008 AT 8:40 PM

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