Car shaking badly at low speed, check engine light flashes at 25mph, and I smell something when it's running. I've changed #1 and #4 coil, new plugs. Ideas on doing it myself.

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Aug 21, 2015

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What are the best Pontiac repair shops?

RepairPal Certified shops can diagnose and repair your 2004 Pontiac Bonneville. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

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Car shaking badly at low speed, check engine light flashes at 25mph, and I smell something when it's running. I've changed #1 and #4 coil, new plugs. Ideas on doing it myself.

What is your question?

Bearsfan in Spencer IA

Aug 21, 2015

2 Replies

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globalhelperon Aug 21, 2015

you def have misfires. what are the codes?

carsmanon Aug 21, 2015

im not an expert--but it sounds like your timing belt is shot

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Popular Answer

What are the best Pontiac repair shops?

RepairPal Certified shops can diagnose and repair your 2004 Pontiac Bonneville. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.