idles/drive fine, until 4k rpm...

[kainvamp]

The engine idles fine and drives great until I'm trying to accelerate past 4k rpm, it kinda just acts rough and doesn't accelerate anymore until I shift gears then it does the same thing. Anyone know what causes this? It just happened yesterday.

[IanS]

use your search button, it could be any of the following

FPR, MAFS, coils, plugs, injectors, TPS, boost leak, vacuum leak, dead turbo.

[kainvamp]

how would i know if it was a dead turbo? I can see on my boost gauge that it is boosting fine like always. Also would the gauge act up if it were a boost leak?

Also I checked the ECU and got a 55.

The MAF is working fine.

If it were a vacuum leak, wouldnt it idleing rough too? Also when I am reving it in neutral it acts fine, it is only while driving this is happening. Anymore suggestions would be appreciated. I'm gonna go check the plugs now.

[kainvamp]

I just figured out that after I get to that bogging point in the rpms, if I shift up and gain a little speed then shift back down I can accelerate like normal in that gear, but I stil can't figure out why its bucks and won't accel all the way through...

[IanS]

thats a very interesting problem, try checking your fuel pressure. Just a random thought, does your speedo work properly? It sounds almost like your speed limiter is engages.