Car Starting Problems
Pontiac Bonneville
Car Stalling Problems

If a 1989 Bonneville stalls but starts up again without a problem what could be wrong?


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Wiki User
2015-07-16 19:33:09
2015-07-16 19:33:09

You might need new spark plugs. They are supposed to be guaged 0.005 of an inch. It's also possible that you might need new plug wires, a starter, an alternator as well as a new coil(though I doubt that.)

.0005 inch gap. I don't think so. More likely .060 inch gap.

Your fuel pump may be on it way out possibly caused by bad fuel filter

My 1991 SSE displayed the same problem, it was a sticking idle air control valve. Carefully remove and clean your IAC with a spay can of carb cleaner, reinstall and see if it cures the problem. Agree with second poster that 0.005 plug gap is absolutely NOT correct. Plug gap should be 0.060 also a starter, and alternator would have nothing to do with an intermittent stalling problem.

You might also suspect the fuel pressure regulator (FPR). classic FPR symptoms are stalls at parking lot speed and a stops - will start good after setting overnight but longer crank time when warm. Pull the vacuum line off the FPR and if you see or small gas your FPR needs replaced.


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There is most likely something in the gas tank. When the car starts the fuel pump starts sucking in fuel and when the trash gets to it the gas will not be able to flow through the clogged pump so the car stalls. When it stalls the fuel pump stops suction and the trash comes out allowing it to start again.

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See the answer to 2000 Bonneville Neutral Safety Switch Location. Had the same problem and that was my fix. You can install a separate Start Button in the Starter circuit to start the car also.

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It sounds like your alternator is no longer recharging your battery. You probably need a new alternator.

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Bentley. BMW. Beetle. Bonneville.

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