MSM decided to not work today. Drove fine last night.

Car has a rough idle. When I rev it up to about 2k rpms in park it'll hold but stumble and drop rpm randomly. When I drive around in 1st gear it seems fine until I give it more throttle then it stumbles. Under any heavy load it'll stumble and sound like a subaru. Not sure if it's running rich or lean, injectors or ignition.

Halp.

Side note, I did fill up with gas yesterday before coming home... possible I got some bad gas?

 

Data logs would help us help you.

 

Cute, no logs bro. OEM computer.

 

You have an auto?

 

Pull and inspect plugs. If nothing conclusive pull wires off one at a time and see which cylinder makes the least difference.

 

Evap problem? does it run any better with the cap off?

 

Did you overfill the tank?

(@Chilicharger665)

 

I will check.

I'll have to try that, not sure if that'll be it.

Nope, only put in 4 1/2 gallons. Went to a friends around the corner and drove home 2 or 3 miles and parked. Started up fine, gave it throttle to pull out and it turned into a subaru.

 

Alrighty, so either an injector is stuck open or the coil is not firing. Running rich.

Pulled a p0302 for cylinder 2 misfire.

I won't be able to inspect plugs until later. I'm going to swap the coil packs and see if I can get it to misfire on another cylinder.