Flashing SES, P0300, Wet Spark Plug, Blow-by
So the title is the really short story.
I've gone through TONS of threads on misfires with the 4.0 (X, Fronty, Titan, and the cars too).
Here's how things have gone down.
Last week, misfire with a P0300, traced down to coil pack on cylinder 1. Replaced the coil pack and the miss and code went away.
Ordered the remaining coils in order to have all 6 be new. Hitachi's, which most agree are OE.
The miss comes back, but this time with some loss of power. New coils come in while at work so I replace the easy ones at lunch. Idles nice and smooth after that.
On the drive home the miss and blinking SES light comes on as soon as I hit the highway. No power over 2000 RPMs and then dies at 2500 RPMs. Get towed home.
Replaced the IPDM ECM relay. No change, still misfires.
I start checking closer and isolate the misfire to bank 2 (right). Misfire/knock could be heard under the vehicle. I then find cylinder 5's spark plug to be wet. Coil for #5 has spark. All spark plugs are new.
I then did a injector clean in case the injector was stuck open. It smoked a good amount as usual, but then ran even more rough after the service was complete. The knock/misfire could now be heard from the top of the engine.
So I decided to pull the intake off. TONS of blow-by. The entire intake was coated in oil. the intake runners for bank 2 had excessive oil build up. The intake valves look ok.
The blow-by has me really confused. I'm going to clean the intake out and replace the PCV and all hoses.
I'm open for suggestions. Actually, I need some suggestions, I don't know what to try next.
07 X OR | 96 XJ | 86 CJ
Boats - Bikes - Boulders