Alright, it did it before I got my RB turbo back, and now the I have my exhaust and FCD, I am still getting a stumble at 5000 at full throttle... If I accelerate through that part of the powerband slowly, no stumble... I'm thinking dirty/clogged injectors, however, I had an injector cleaning done (without pulling them out, just the stuff through the vacuum line, gas tank and oil) and it hasn't improved.... Any ideas?

 

Maybe check your tps, mine was stumbling for a while like you but then I re adjusted it and it went away.

 

I've been meaning to adjust that anyway, because it idles like ****.

 

Anyone else have any ideas? Like Icemark, or maybe Aaron... Or RETed... You guys are all the geniuses, help me out here!

 

C'mon, there have to be other solutions... Don't you guys want my car to go really really fast?

 

How about the fuel filter? And the stuff throught the fuel sucks, it doesn't get everything out like a real cleaning, send them to rc engineering for $25 each. Sounds like a lean miss, a flatspot.