Boost creep or compressor surge?

[eoseitz]

I've read a ton of the forums about both of these and I'm not sure what is causing the problem. I guess I'll go ahead and explain it and see what everyone thinks.

I have a manual turbonetics boost controller and a 14b turbo. I've done the air can mod (simply cut the sides off and put in a k&n air filter)

In first gear it only runs about 5 psi. Then in second and third gear it hits about 9-12 psi. It isn't always exact. At fourth gear it hits about the same except at wide open throttle. At WOT it jumps clear up to 30 psi.

Could I have a boost line leak? The car does have a slight miss at idle. It makes me wonder. I have no way to test the boost lines as of right now. My other guess would be the boost controller is just crappy. Should I go with an electronic one so it can adjust the boost levels as I drive? I found an ecu+ that are getting pretty descent reviews. Its kind of mixed reviews on this site.

Please help. Thanks everyone.

 

[eoseitz]

Just checking in to see if anybody can give me help on this. Any idea anyone?

 

[vettesmoker]

sounds to me like your wastegate is stuck partially open. open just far enough to not build boost on a quick rev like first gear, but closed enough to creep to 30 under load.

 

[DSM4me44]

1. Check to make sure you MBC is connect right and in working order (the ball and spring isn't stuck)

2. Do a Boost Leak Test

3. Check your waste gate and make sure it is opening and closing. To be most efficient, do this. Remove the actuator. Move the door open and close. Once that checks out. Put the actuator on and test it to make sure it is opening the door and closing the door. I used a valve stem and attached it to the vac line running to the actuator. I could see if it was working by giving it air and leting the air out.