Ben4991

The Car ran great broke my clutch and it sat for A week or so, put it back together and it started stuttering when in boost above 5k rpm,s. I just bought the car it has 70mm turbo at 11psi arp head studs full apexi exhaust aem stand alone version 1, Nology wires aem fpr. That's about all I know about it I'm lost at what could cause this. i checked all my vacuum and for boost leaks can't find any afr looks good. hoping some one can help me out.

Cleanshots

iTrader: (2)

sounds like you have the wrong spark plugs homie. get ngk bkr7eix if u put in oem gte plugs its wrong.. i know its the problem 1000 percent

Ben4991

Ok the car has bkr8eix

Ben4991

Ill go buy a set tomarrow and give it a go

Ben4991

Thanks for the help plugs solved the problem

Ali SC3

iTrader: (10)

11 psi does not get hot enough to "heat cycle" a range 8 plug which is how the spark plug clean itself.
when your plug is too cold you get fouling. stock GE plugs are like a 5 range, and a stock TT is a 6 range which would work for your psi, but a 7 works better when BPU or single turbo and is what most run. if you were closer to 20 psi you would want to try out a 8 range.

blk&blu*j

iTrader: (1)

I run 30+ psi on e-85 and I run a 9eix . remember on NGK the higher the # the cooler the plug

Ben4991

I would like to up my boost but I want to know what internals I have first

Ali SC3

iTrader: (10)

probably a GE with a tt headgasket and arp studs unless they told you they did lower end work.

Ben4991

They said they did but idk yet