CAMARO6 - View Single Post

JustDo1nMe · 01-11-2021, 01:26 AM

Hello, hoping I can get some help or see if anyone else has had a similar issue...

My 2018 ZL1 has just about 3000 miles. It was dyno tuned with a rotofab intake, ARH headers, borla cat-back, and LT5 throttle body.

Just before winter started, I was out on a normal cruise when the car started misfiring. It through a CEL (P0303) Misfire Cylinder #3. Along with the CEL, the instrument panel displayed errors (service rear end/axel). The codes go away when the car is shut off and then turned back on but will re-trigger once the car goes over 2k rpms. Even when codes are cleared... you can tell it has a misfire in the idle.

I have not tried any trouble shooting yet.

Any feedback is greatly appreciated. Thanks in advance!

01-11-2021, 01:26 AM	#1
JustDo1nMe Drives: 2018 ZL1 Join Date: May 2016 Location: Ma Posts: 112	Misfiring Issues 2018 ZL1 (Cyl #3) Hello, hoping I can get some help or see if anyone else has had a similar issue... My 2018 ZL1 has just about 3000 miles. It was dyno tuned with a rotofab intake, ARH headers, borla cat-back, and LT5 throttle body. Just before winter started, I was out on a normal cruise when the car started misfiring. It through a CEL (P0303) Misfire Cylinder #3. Along with the CEL, the instrument panel displayed errors (service rear end/axel). The codes go away when the car is shut off and then turned back on but will re-trigger once the car goes over 2k rpms. Even when codes are cleared... you can tell it has a misfire in the idle. I have not tried any trouble shooting yet. Any feedback is greatly appreciated. Thanks in advance!