Turbo problems. PLEASE HELP!

[MSP2003.5Justin]

So, I have replaced the OEM wastegate actuator, with the Forge WGA, and now when i boost it will boost for a bit and then spike down to like it is not boosting at all? No boost leaks, wastegate assembly seemed fine. I am completely lost. Turbo is in good condition. Any replies will greatly be appreciated. i'm looking for a great answer to help me fix this problem ASAP.

 

[jeffmsp]

is it the adjustable version? what psi r u getting to when it does boost?

when u had everything apart was the wastegate easy to move open/close by hand or was it a bit hard to move. (not the actuator, the arm that it connects to on the back of the turbo)

 

[MSP2003.5Justin]

It was very easy, and yes its adjustable, my normal boost before the aftermarket WGA was 5, now it goes 5-8ish and spike extremely low pretty much right after full boost. Any ideas to fix this problem?

 

[MSP2003.5Justin]

Also it seems to be boosting at low rpms in 2nd and up, around 3000-4500. If you need me to explain more for you to understand the problem, let me know i'll do my best. Thanks for the replies.

 

[89JDM]

What does your Vac read at idle?

 

[MSP2003.5Justin]

Normal 20-23.

 

[jeffmsp]

whats low? like 4psi from 4000rpm to redline?

did you make the new adjustable arm the same length as the stock wastegate arm?

 

[MSP2003.5Justin]

Yes, I had to adjust it one turn smaller to keep the wastegate itself shut.

 

[MSP2003.5Justin]

its boost 5-6psi and rpms are low around 3k to 4500k and after that the boost just disappears.

 

[hornsfan10609]

The internal wastegate flap might be opening early, check to see if the arm where the WGA arm connects has backed out of the exhaust housing on the turbo.

 

[MSP2003.5Justin]

the wastegate seems really easy to open and the flap seems really movable, is there suppose to be a washer there to keep it from being flimsy? Wastegate assembly suppose to be very easy to open with the acuator removed right?