[Montec72]

Hi,
I could use some ideas here. 2016 camaro ss, m6. Mods are lt2 intake, rotofab. No tune. Been on for a couple years with no issues. 21k miles. It’s been sitting for a bit but having issues. Getting p0300, u0401, c0800 codes. Check engine light blinking. I’ve tried plugs, wires, coils, o2 sensor. Took battery out to fully charge. Battery about a year old. Cleaned all grounds. All had no effect. Took intake off checking for any vacuum leaks. No luck. My next ideas are cam sensor, crank sensor, maf, injectors? Car has not been driven hard. No recent high rpm pulls. Any help is appreciated. Thanks

[Simshahh]

generally a failed injector will throw a specific cylinder code, ie p0301/p050d. if you dont have a scan tool that will read live data to show you which cylinder is misfiring, do a compression test on all cylinders. if you do have a scanner that reads live data, monitor misfire data, and perform compression test on that cylinder.

[Montec72]

Quick update. Weird one. I took plugs out again, which were new and cleaned them. Runs perfect now. I guess the misfire was fouling out plugs. I assume one of those sensors or battery charge was causing misfire but needed a final cleaning of plugs.