Over boost in 2nd and 3rd Not in 1st

[joeyzaza]

I just got my car back on the road after 14b install. I have the wastegate actuator teed into the BOV line, no MBC just spring boost pressure. I do not have a nipple on my JPIPE.

When in first "car is auto" the car boosts to 10psi, when the car shifts into second it goes to 17.5 psi. When cruising, if I stomp on the gas, the car boosts to 17.5 psi.

I took the arm off the wastegate flapper and made sure it wasn't stuck. I pulled on the wastegate actuator arm, and it moves with some force.

From what I am reading, this does not look like boost creep.

Anyone have this issue before and resolved it.

Thanks in advance

 

[joeyzaza]

Update:

I worked on it tonight at about 10pm, it started snowing, and it was pretty cold... gotta love michigan!

Anyways, I got some new T bolt clamps to put on where the lower and upper intercooler pipe connect. I had to take out the intake for that, so I pulled the vacuum line off the wastegate. I brought it in and compared it to the old one. The old vacuum line hole is smaller then the one I had. I talked to my buddy Matt earlier " who has the sweetest 2gnt in the state" his car is on the main page of 2gnt.com Said he had the same problem when installing a MBC on his Evo 9. He said that he used a different size vacuum and that was the problem.

Well it started to really snowing, so after I changed the line I couldn't test it out.

I will probably run the car tomorrow. Thanks!!

 

[Backinajiffy12]

Still creeping?

 

[joeyzaza]

Yup. Well I dont know if its creeping or just oncontrolled boost. I tried a different vacuum line, and that didn't change anything.

I just ordered a wastegate actuator for $20 shipped, so I'm going to try that next. If that doesn't work, I guess I will have to do some porting.

Sorry for the late response, I've had the flu all week. I should have the new actuator installed by Tuesday. I'll update it then.

Thanks

 

[mountaineerjeff]

let us know how it works out.

 

[joeyzaza]

I put the new wastegate actuator on today, and test drove the car. Its still doing the same thing.

I'm going to order an open o2 dump, pull the turbo, and port it out.

 

[Backinajiffy12]

good idea^ to port the turbo also if you have the money put a 34mm flapper on it

 

[joeyzaza]

I have been reading about porting, and it does not seem to hard.

I'm actually ordering some 550s and a 190 Walbro, so I'm going to see if I can just tune for higher boost, I have a SAFC already. If not then I will be porting, I probably wont put the larger flapper in, I'll buy a bigger turbo by summer I'm sure.

I will update on how I resolved this issue, thanks everyone who helped!!!!