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Pontiac Repair/pontiac montana chugging

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Question
my 2001 pontaic montana is having trouble wanting to start when i put in reverse it sometimes stalls but in drive when reaching speeds in the am first starting its chugging and engine light starts to blink but then goes away after the vehicle starts going. any ideas what it could be? thanks

Answer
Hi Pamela:
there is an engine misfire. The fact that the light blinking means the misfire is severe enough to cause catalytic converter damage. if it only does it on a heavy acceleration chances are it's a had spark plug wire. if it misfires all the time then it could be something worse like an ignition coil or a ignition control module. with out seeing it I can't tell you for sure but it sure sounds like that is the issue. If it does it worse when it's raining out or on a damp AM start up then for sure you have bad spark plug wires.
Good luck :-)

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Todd Puccio

Expertise

General auto repair,electrical issues,driveability issues,anti-lock brakes,SIR systems,HVAC,engine performance,Gm specific. I have worked at my current dealership since the 1990 model year anything much older than that I have limited exposure to. I do not have very much transmission experience so those question you may want to ask of another expert. When you send me a question let me know the exact make/model/engine and year for the car or suv you have it makes it easier to answer the questions that way. If your happy with the answer I gave you please feel free to Donate. This is a free service to you and I am not compensated at all by this web site. I have 22 years of experience to share with you and my knowledge wasn't free to me. I had to pay for my education.

Experience

Experience in the area: I have been a technician in GM dealerships for over 22 years and I am a ASE master technician. I work at a Buick and GMC truck store Previously I worked at a Pontiac GMC store for 18 years. I Served a a lead technician when dealership was on a team system. I just recently moved to a Buick,Hummer,Saab Store when my franchise was purchased by this dealership. Organizations: ASE master technician

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ASE

Education/Credentials
Education/Credentials:High school diploma,2 year vocational school degree 2 year college degree. Associates degree in applied sciences (auto technology)Awards and Honors: GMC master technician

Awards and Honors
Master GMC truck technician Master ASE technician in 9 categories

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