Hello,

I am currently stumped and need your help. I have a Ralliart that has misfires on cylinder 1 and 4.

Spark plugs looks/seems good

Coils are good we switched them out to test and it still misfired on cyl 1 and 4.

we first diagnosed it as the injector being clogged. changed both injector for OEM replacement (I work for mitsubishi) and it STILL misfires.

We did a compression test, compresses right on the specs at 158. I just bought the car.

The previous owner did a Borla catback + changed the filter/intake airbox aside from this the car us stock

has anyone had that problem what was the fix, has that been a common issue?

during the road test engine stutter at around 4.5k rpm however i would assume the engine just goes into limp mode as to protect the engine.

Thank you for the help.