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1990 Pontiac Grand Prix stalling

Tiny
MIKE MASCORRO
  • MEMBER
  • 1990 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 132,000 MILES
I don't know if this engine has a rev limiter. But at 4000 rpm it starts stalling out. It has been dieing going down the road. I have changed the computer. Fuel pump and filter. Had the ing module checked. Changed the plug wires. Changed the oil pressures switch. And the crank sensor. Still stalls out?
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Sunday, July 5th, 2009 AT 2:04 PM

1 Reply

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,549 POSTS
Most have rev limiters, but not at 4000, more likely 6000.

Have ignition module checked and fuel pressure with a mechanical gauge. It is also possible the CAT is partially clogged. It can be checked with a CAT backpressure test.
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Monday, July 6th, 2009 AT 8:03 AM

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