I have a turbo charged 06 s2ki. it makes 430whp at 12.5lbs boost. im using a hondata flashpro with 1000 ID injectors. it has NGK iridium spark plugs(BKR7EIX). has the new aeromotive in tank fuel pump which is 350lph. also change to a return fuel system. got it tuned from sean at church automotive. car ran fine for about a month. it now sputters or hesitate at high rpm when i punch it and the check engine light flashes around 6 or 7 times. im guessing this is a missfire code. anybody knows what is causing this. i tried gapping the plugs already and still same problem. please help. thank you!

 

first off, pretty sure you should be using plugs with the 8 heat range. how did they look when you pulled them out?

secondly, go to autozone and pull the codes

 

i know this my sound a lil out there but did you check the oil level? Similar situation happened to a friend and the cause was lack of oil.

 

Change to heat range 8 and gap to .032

 

plugs look fine when i pulled them. check the code and it was misfire. i will try 8 heat range. hope it helps. thanks!!

 

i will try that. thanks!!

 

I was having a few problems with hesitation and sound like misfiring. I ended up swapping out my coil packs and it seems like it helped. I haven't experienced the same problem yet (knock on wood).

 

change the plugs to 2668 and gap them to .o25 im running 10lbs and its running fine

 

Are you running PNP connectors on your fuel injectors? I had the same problem and messed around with the wires a bit and the misfiring ended. Running the 2668 as well.

 

yes i have the PNP connectors. what did you do with the wires to fix the problem. what are 2668?