Dec 172013

was checking vacuum at power boost, noticed motor runs with line unplugged but when you put gauge to line or just cover with thumb motor stalls. what could cause this? thanks steve

  3 Responses to “2002 caviler 2.2”

  1. Would like to know what caused you to want to check vacuum at the booster to begin with.

    Typically the engine RPM’s will go up when you induce a vacuum leak such as removing the vacuum brake booster hose. This is NORMAL.

    While the hose is disconnected, the IAC – Idle Air Control will try to compensate and upon plugging the hose may sometimes cause the engine to stall. Simply restart the engine and it should compensate.

    If you were having idle issues to begin with, the IAC may be sticking.

  2. no problem was my wife drives this car and she said brake pedal got hard and she couldn’t push pedal so i was checking to see how much vacuum it had when i put gauge in line motor stalled but when hooked to booster runs fine

  3. Brake pedal feel is firm, but brakes lack sufficient stopping power or fade: Read More…

 Leave a Reply