Hello! Recently a CEL popped up blinking while on the highway. Pulling the code, it was a cylinder 3 and 4 misfire.
This is a 1998 Subaru Legacy outback
Funny thing is, the blinking CEL only pops up when RPMs are above 3k or at 70+mph . Even so, there is no audible noise or power loss when the light comes on.
If I drive local and stay off the highway, the CEL came on ONCE and it came on when I was holding a high RPM. No funny engine noises when the light blinks though.
Ive replaced the Plugs with NGK Plats. and Wires to NGKs. Replaced coil pack as well. Switched around injectors and still have a 3 and 4 misfire.
Reading up on the exhaust dollar trick it seems that I do have suction though.
Not sure what to do or anything else I can try before bringing it in. Any suggestions would be greatly appreciated!
Edit: The car functions fine until I reach (higher) highway speeds or extremely high rpm and it throws a blinking CEL.
Then it goes solid if I bring the RPMs back down. Accelerate back up to 3.5+k rpm in 5th gear and it starts blinking and goes solid and it'll stay solid if I'm driving local roads. No misfire noise, no shrudder, no loss of power.
Edited by wasabiboi, 07 May 2014 - 05:09 PM.