1990 firebird formula 3.1l engine starts up and cuts off after depress gas pedal down

5

Asked by Dec 17, 2013 at 08:01 PM about the 1990 Pontiac Firebird Formula

Question type: Maintenance & Repair

after depress gas pedal down  have replaced spark plugs, wires ,cap , rotar
,ignition coil,ignition module stumpped please help engine only has 91000 original miles one owner

1 Answer

4,765

Sounds like a bad throttle position sensor (TPS). On your car it's mounted on the throttle body. If you're handy with a voltmeter, it's easy to check if the TPS is working correctly. It needs to show .55 V at closed throttle. The other possible fault is with the Idel Air Control (IAC) valve.

Your Answer

Pontiac Firebird Experts

  • #1
    Samuel Moore
    Reputation
    980
  • #2
    dandyoun
    Reputation
    810
  • #3
    John Saffrahn
    Reputation
    700
View All

Related Models For Sale

Used Chevrolet Camaro
416 Great Deals out of 30,636 listings starting at $3,550
Used Ford Mustang
692 Great Deals out of 37,616 listings starting at $895
Used Chevrolet Corvette
277 Great Deals out of 20,545 listings starting at $2,990
Used Ford F-150
2,293 Great Deals out of 183,552 listings starting at $699
Used Pontiac Grand Prix
30 Great Deals out of 2,700 listings starting at $1,491
Used BMW 3 Series
1,144 Great Deals out of 32,951 listings starting at $1,300

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.