Having problems with your 2003 Pontiac Montana ?

Rough idiling. Sputters but wont stall when put in drive. Computer said mis fire on 4. Changed coil and plug. Computer shows nothing now. Same problem.

Posted / edited by AnonymousUser on : 03-08-2020

Answers :

It could be a problem with the injector for that cylinder(dirt or electrical).how are the other plugs do they need to be replaced.
Repair Help & Product Troubleshooting for 2003 Pontiac Montana

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