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P0301 Again! Wtf!?!?!?

1302 Views 3 Replies 2 Participants Last post by  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?
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· Late for Dinner
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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
 

· Registered
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Discussion Starter · #3 ·
Awesome, thanks, I'll try that tommorow...

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

· Registered
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Discussion Starter · #4 ·
...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...
 
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