LQ4 swap multiple missfire problem
TECH Fanatic
Joined: Jan 2018
Posts: 1,250
Likes: 239
From: Dade City, Fl.
Replace spark plugs first. The spark will take the path of least resistance. If any plugs are bad the spark will find a way to ground either through a spark plug wire or at the coil. Wherever the path of least resistance is.
Thread Starter
On The Tree
Joined: Feb 2020
Posts: 180
Likes: 14
Well solved for a second time.
The ground was the issue. Had a high resistance between the coil harness connector and the cylinder head. Low resistance between the connector and the copper ring terminal I used.
I put an external star washer between the terminal and cylinder head thinking it was a good idea but it clearly wasn’t.
Runs much better now. Still have a P0132 code but that won’t be a big deal to diagnose.
Thanks for the help!
The ground was the issue. Had a high resistance between the coil harness connector and the cylinder head. Low resistance between the connector and the copper ring terminal I used.
I put an external star washer between the terminal and cylinder head thinking it was a good idea but it clearly wasn’t.
Runs much better now. Still have a P0132 code but that won’t be a big deal to diagnose.
Thanks for the help!
