Question about 1991 Pontiac Bonneville

1 Answer

The car stalls intermittintly, especially at low speeds, but also on the highway, often when I step on the brake, but not always; it just dies, but I can put it in neutral and the engine starts right back up

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  • hwhitman Feb 05, 2010

    The vehicle only does this when decelerating or sometimes when just "coasting" like rolling down the street with liitle or no pressure on the accelerator. Stepping on the brake nearly always causes it to either die or "try" to die.

    The vehicle has fuel injection, so no carburetor.

    Can the sensors be checked at most shops or do I have to go to a dealer?

  • hwhitman Feb 05, 2010

    Thanks, that kind of confirms what I was thinking.

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  • Pontiac Master
  • 17,970 Answers

If you have this problem when accelerating, check in the engine...
-FreshAir Intake Hose for Clogged or Damaged FreshAir Intake Hose

If you have this problem when driving, check in the engine...
- Carburetor for Worn, Faulty or Damaged Carburetor.
- Mass Air Flow Sensor for Damaged, Loose, or Faulty Mass Air Flow Sensor or Circuit.

Other problems can find it in the Throttle Position Sensor, Idle Air Control Valve, Idle Speed Actuator or Idle Stop Solenoid.

Additionaly, I suggest make one scaning for review fault codes.

Hope thats help.

Posted on Feb 05, 2010

  • ZJ Limited
    ZJ Limited Feb 05, 2010

    Initially
    you could visit a store, however, a more precise details could be
    obtained by scanning the vehicle (in some autozone could do it for
    free).
    If this situation occurs also when braking, it could be some connection of vacuum hoses.

    The sensors, beyond visual inspection, if it is not known, it is best not to touch them.

    Good luck.


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