i had the same exact issues. I was running to rich due to my VAFC-II not being able to pull enough fuel with my 550's at idle and crusing speeds other than that the reason for my misfiring was because of the tune. mine did pull hard WOT though without the misfires on 10lbs of boost 550's and a vafcII. Its gotta be the tune cause my plugs are gapped at .30 and im runnin stock injectors on 5 lbs of boost and my car runs fine off a comptech rising rate fpr and esm. could it be the 750's sticking and dumping fuel when the car gets warm? just a thought.

 

The injector is shot for sure. I got it to exhibit the symtom at idle today, puled the #1 injector wire and no change. Pulled the coil and it was firing so I know for sure it is the #1 injector.

I am just curiuos as to the reliablity of these specific injectors.

 

i think i recall ya from inline saying something about the 750's. I can't remember what thread or topic it was discussed on. Good luck on gettin it running right.

 

i think he was saying that some failed when their static fuel pressure went over 44lbs.

 

there you go i think thats what i recall reading somewhere.

 

I decided to give RC a call and they advised me that the injectors are rated up to 68psi. I went ahead and ordered a new set and will be shipping mine back to have them take a look and fix the bum one. I guess one cannot have too many injectors.

 

AEM EMS....

i had the same issue...also burnt a spot on the EMS... aem fixed it under warranty.

 

I know for sure it is not the ems, we hooked up an oscope and it was a nice square wave with the injector clip unplugged but went goofy with it plugged in. Also swapped cylinders just to make sure.

 

Updated first post at the very top of it

 

Bump Thanks!