Need some troubleshooting advice. Car won't build boost until approx 4500 rpm with max throttle. Max boost i get right now is about 7.5 psi. Messed with the boost controller to see if that was the issue (wasn't). I even have the car set up right now to just use wastegate pressure w/ no luck.

Did a boost leak test and car was leaking bad. Found a leaking hose off of the intake manifold. Replaced the hose. Accomplished another leak test, and car is rock steady at 25 psi; but car is still doing the same problem described above.

I bought the car and pretty sure it had some mods on it previously, but returned to stock (except it has a downpipe on it now.) I am thinking the turbo has just gone bad, or maybe the flash on the ECU is for mods that were previously on the car, and wasn't flashed back to stock??

Also, how do you really test the turbo wastegate?

Any input is appreciated. THANKS

 

First off, did the wastegate arm fall off the turbo? Does it make any vacuum cleaner/grinding type noises?

Get a vacuum hose and attach it to the wastegate nipple. Add a few psi and it should start to move. You can get a cheapo hand pump from sears or auto store if you don't have a compressor.

 

good luck!

 

do you still have a catalytic converter on the vehicle, if so it could be plugged.

 

Also make sure you didn't put the boost controller on backwards....

Sound silly but I did it.... (T_T)