[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...