My 1989 Pontiac Bonneville dies right after I apply the brakes. What is causing this? What do indeed to look for and change?

Asked by Batman91 May 05, 2014 at 10:23 AM about the 1989 Pontiac Bonneville

Question type: Maintenance & Repair

My car dies instantly when I press the
brakes, it will turn on just fine, but when I
come to a complete stop or slow down,
mycar just completely dies.

185

comgoog3 answered 10 years ago

Sounds like it could be a vacuum leak to me. Does the engine idle smoothly in park(without the brakes applied)?

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Batman91 answered 10 years ago

No, it doesn't idle smoothly.

Mark helpful

185

comgoog3 answered 10 years ago

I would check the vacuum lines then. If not, make sure the PCV (positive crankcase ventilation system) isn't clogged. Is there a hissing from the brakes? If that is the case it could be a bad brake booster (like my truck, it stalls if I floor or slam on the brakes).

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My 1989 Pontiac Bonneville dies right after I apply the brakes. What is causing this? What do indeed to look for and change?

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My 1989 Pontiac Bonneville dies right after I apply the brakes. What is causing this? What do indeed to look for and change?

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