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Dan
Dan, Technician
Category: Pontiac
Satisfied Customers: 24459
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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My 2003 ponitac sunfire runs good 30 mins. then it loses

Customer Question

my 2003 ponitac sunfire runs good for like 30 mins. then it loses power like its missing. so i replaced plugs then it did. the same. what do i check next?
Submitted: 1 year ago.
Category: Pontiac
Expert:  Dan replied 1 year ago.

Hello, my name is***** the check engine light start flashing? Is check engine light usually on? Thanks.

Customer: replied 1 year ago.
Flashes
Customer: replied 1 year ago.
U Sally it's off
Expert:  Dan replied 1 year ago.

This most likely means ignition coil or ignition module has failed. I'd recommend replacing both with a used assembly from salvage yard. Otherwise to figure out what one has failed during problem you will need to test spark on all 4 coil leads. If it is missing spark or weak spark on only one cylinder replace coil. If it is 2 cylinders replace ignition module. Let me know if you have more questions, thanks.

Customer: replied 1 year ago.
Ok I'll check that
Expert:  Dan replied 1 year ago.

Sounds good, let me know how it goes. Thanks.