Still misfiring after changing coils.
Thread Starter
Junior Member
Joined: Oct 2015
Posts: 19
Likes: 1
From: Dedham,MA
2000 Mercedes-Benz C230 Kompressor
Still misfiring after changing coils.
So today i had cylinders 2 and 4 misfiring, i replaced bother ignition coils and now it's just cylinder 2. Cylinder 2 was misfiring before but i fixed it by cleaning out the fuel injectors. So why replacing both coils would fix cylinder 4 but not 2 has me stumped.
Senior Member
Joined: Sep 2010
Posts: 446
Likes: 2
From: Culver City, California
1999 C43 AMG
Did u try to change both coils swap them vice versa and run codes? Just asking just in case. Check the connections could be wires, follow from the connection to when it goes into the harness since you can fixed the wires. I'd put in some seafoam into the brake booster and pull the accelerator wire to stop it from keep it turning it off and maybe that can help. Worth a try. Process of elimination
Thread Starter
Junior Member
Joined: Oct 2015
Posts: 19
Likes: 1
From: Dedham,MA
2000 Mercedes-Benz C230 Kompressor
I can think of a few possibilities. A dead fuel injector, bad wiring, a blown or fouled spark plug, or the coil boot not being on tight enough. Funny thing is that a few weeks ago i was having a misfire in cylinder 2, i originally fixed it by swapping and cleaning the #1&2 fuel injectors. I also believe i may have leaky valve seals since i usually have smokey cold starts.
