I’m working on fixing my sister’s 2016 Chevy Malibu with the 1.5T engine. She said it was running rough, so I did her spark plugs because she hadn’t done them in the 40k-50k miles she has had the car. I figured that would be a good place to start. I also replaced her air filter at the same time. The rough running got worse, so she took it to Advance for an engine scan, and cylinder 2 was misfiring. I figured to replace the fuel injectors. Did so, and now the misfire is on cylinder 1 according to my OBD scanner. Wtf. 96,000 miles for reference
Reset codes. Swap coils 1 and 4 and retest for a P0304 instead of your P0301. If it’s now 304, replace the coil that’s now on cylinder 4. Confirm that injector connectors are fully seated and that the internal plastic retainer is not broken, the one you push in to remove the connector
Have you checked for vacuum leaks? That can sometimes cause misfires too
Rory said:
Have you checked for vacuum leaks? That can sometimes cause misfires too
I haven’t checked that yet. I’ll look into it next
Sometimes it’s just a bad batch of fuel too. Have you considered that
Nico said:
Sometimes it’s just a bad batch of fuel too. Have you considered that
True, I haven’t thought about that. Maybe I should try adding some fuel cleaner
I feel for you. Misfires can be a pain to diagnose. Let us know what you find out