Having problems with your 2002 Pontiac Grand Am ?

While idling, the engine sputters. check engine light on, reading misfire in cylinder four. Have replaced both coils, all wires, and all plugs. Still no help. I've come to a dead end. Anybody with ideas?.

Posted / edited by AnonymousUser on : 12-11-2018

Answers :

Hi, this may be a dirty injector. Try putting some injector cleaner in the gas tank to see if that will clear it up. If not, you may need to pull up the fuel rail and check the injector flow pattern.
My 2005 grand am is missing firering changed the coil pack and plug also the fuel and air filter and still missing firering
Repair Help & Product Troubleshooting for 2002 Pontiac Grand Am

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