OK i just rebuilt my engine and broke it in. running great and if i drive it easy its fine, when i go WOT on it then its fine until i hit boost and about 6krpms it bucks really REALLY bad like whiplash bad. it cuts and then goes and cuts and goes.... really quickly. i need to find the problem with this because its really annoying and I'm sure its not good for the car. Here are my mods so maybe it might be there:

PFC and commander
non-seq set up
apexi intakes
greddy exhaust (DP,MP,catback)
tripoint flywheel
ACT 6puck sprung clutch
fluidine rad
All emissions removal with blockoffs.
I think that's all that would matter the other stuff wouldn't affect this...

And the idle is jumpy I watch my commander at idle and its jumping because my inj duty is going 7%,0%,7% and so on. I checked my TPS and its at the right setting. I'm thinking the problem is somewhere in that area. any help would me much appreciated.

thanks
Robert

 

When my primary coil went bad, I experienced the same symptoms

 

is there a way i can check that out?

 

yes, I dont have the service maual in front of me but PM me and I'll look it up

 

pm'ed you, could this be a grounding issue?

 

please report back if you figure out what is causing that