Misfire problem
Thread Starter
Racer
Joined: Mar 2007
Posts: 313
Likes: 0
Misfire problem
I got some new Katech valve covers with the coil realocation kit, painted the intake manifold, and installed some billet fuel rails. I am not getting a misfire. I checked all the wires to make sure they are pushed on properly. I had someone hook up their laptop and the passenger side 02 sensor was showing a really rich condition. The guy that did this seems to think that the coil packs are not grounded out properly. Does this sound like a possibility or do you guys have any other suggestions?
Tech Contributor
Joined: Jan 2007
Posts: 19,571
Likes: 1,209
From: Dyer, IN
Ok...make up your mind here....
The coils are grounded through the harness at G107 behind the drivers side head. Sounds like you have it isolated to a bank. I'd go over your work, checking the coil/injector harness....plug wires, etc.
I checked all the wires to make sure they are pushed on properly. I had someone hook up their laptop and the passenger side 02 sensor was showing a really rich condition. The guy that did this seems to think that the coil packs are not grounded out properly. Does this sound like a possibility or do you guys have any other suggestions?
Thread Starter
Racer
Joined: Mar 2007
Posts: 313
Likes: 0
Sorry about the typo. I am getting a misfire. What do you mean when you say G107?
Instructor
Joined: Jan 2010
Posts: 156
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From: Long Sault Ontario
If you can get ahold of an infrared thermometer, you can take the temp of each exhaust (on the exhaust manifold/headers close to the head), and it should show one or more with a much lower temp. That will show which cylinders are causing the misfire. Then check those wires, plugs etc.... If you cant get it from there, change one coil pack from a cylinder thats ok and check to see if that one is cooler. If not, change the wire and try again. then the plug if not.
Tech Contributor
Joined: Jan 2007
Posts: 19,571
Likes: 1,209
From: Dyer, IN
