Keith1138
Well-Known Member
- Joined
- Nov 18, 2015
- Location
- Harrisburg NC
After I reconnected my battery from welding on my anti-wrap bar my jeep has developed a cylinder 3 and 4 misfire. Above 1500 rpm the jeep starts blinking the check engine light then drops cylinder 3 and 4 completely. Then the misfire continues at idle. I can unplug both injectors and the sound doesn't change. It is getting spark and the injectors are getting power. I've also tested the injectors and they do function correctly. When I did a compression test all the cylinders were with in 10 psi of each other. I'm now leaning towards the ECM being bad. I think it's thinking the cylinders are not firing and when it sees so many counts it cuts the injector from firing. With the cylinders 3 and 4 missing at idle I can cut the jeep off and back on and the miss is gone.