[Darth Focus]

Code P0301 Misfire Cylinder 1

I have replaced spark plugs several times, ignition coil (now have MSD) and Wires (MSD). What else could it be? One thought is a fuel injector, but does that make sense? Could it be sticking just slightly on occasion? I dont feel the misfire. It mostly comes on while the car is idling.

..any thoughts?

 

[goinloco1]

fought this with a #4 misfire.
turned out the oring thats supposed to seal the injector to the intake was leaking causing a vacuum leak and a missfire.
spray some carb cleaner around it and see if its leaking, youll know when the engine bogs a little.
replaced the oring and no more problem

 

[Darth Focus]

Awesome, thanks, I'll try that tommorow...

...I figured an injector or a rubber boot on the DSI manifold..

 

[Darth Focus]

...on a side note, not sure if you have a vac/ boost gauge, but at idle Im around 13-15in/hg. Shouldnt I be near 18-20in/hg? You might be onto something...