Boost cutting out - Need help!
 

Hi guys

I am running an Evo 6 at 1.1 Bar and am experiencing hunching when I start passing 5000 rpm... This is happening mainly from 3rd gear onwards for some reason and the turbo starts cutting out and losing pressure all the time. I thought it was a leaky boost gauge which I replaced with a new Greddy but still no change.

My Boost Controller has also stopped working and switching between low/high boost or switching it off completely has absolutely no bearing. I checked the HKS filter for dirt but its clean and I cannot find a solution.

I just had some HKS plugs put in but I am not sure if this is the problem. Could the plugs have made such a dramatic impact?? I some how doubt it...

Any suggestions on how to fix this or what else could be the root of the problem? (I was planning to stick a fuel regulator, modified fuel rail and a slightly modified Evo 7 Turbo this weekend, but its pointless to carry out the work until I find a solution...)

Any recommendations here would be greatly appreciated!

RE: Boost cutting out - Need help!
 

sounds like a boost leak. How good is the BOV you have on it. And also check the IC piping and intake to see if there is a leak anywhere. Or it also could be the wastgate

RE: Boost cutting out - Need help!
 

Thanks for that. I will run the test tonight and check the pipes... BOV is brand new - Tornado (I think its Australian...)

RE: Boost cutting out - Need help!
 

Does sound like a vacuum leak but check your plugs and wires just to be sure. Also maybe the injectors are dirty. Just a thought

RE: Boost cutting out - Need help!
 

What turbo are you running? It is normal for the T25 turbo to decreace by upto 10psi on the high end

RE: Boost cutting out - Need help!
 

did you happen to read his post..he has an evo not an eclipse

RE: Boost cutting out - Need help!
 

hey bro. i would have to say its ur belts. whens the last time u changed them? cuz my turbo was doin the same **** until i got new belts now it runs like a charm