Ok just the other day I was driving my evo on the highway and when I was pushing on the gas my rpms went up way faster then normal and then dropped about 500 rpms. Almost like boost is coming faster and is leaking. I tried all the gears and only noticed it in 2nd through 5th. Any ideas? Never had a problem before.

 

only think i can think of is a slipping clutch

 

I noticed that only twice on my evo. As I was accelarating, the rpm gauge dropped about 500 rpms, and then caught up, but there was no change in the engine rpms. I think either the sending unit to the rpm gauge is loose, or their is a short.

Doesn't happen but maybe once a month. Only if I am looking at the gauge though, no actual engine loss.

 

What about boost creap?

 

No boost creap or drop at all. I have the E-01 and it graphs out about 15 seconds of boost history. Held 19psi all the way through.