How are you. I decided to replace my coil pack due white ash on the towers and vibration when idle, so I bought ACdelco D555 for my car, after installed the car had a miss worse than before when opening the throttle only but ran with power like new again and fast.
After 30 miles had to remove the 1, 4 coil and put the not so bad old one back this was because it was miss firing really bad with p0303. So I had a new coil and an old one. Drove it for 900 miles then today it started to miss fire again but only in gear, low rpm and when opening the throttle still no check engine light
Did I messed up the ICM by installing the AC delco d5555?
The old coils messure 7500 ohms
The new ones messure 5700 ohms
This happens mostly in closed loop.
have the same problem?
Monday, May 25th, 2015 AT 5:24 PM