Possible that I have a large boost leak?

[algomni]

Hey guys, I have a 96 Eagle Talon TSI. It has the stock t25, manual boost controller, Tial BOV, aftermarket boost gauge, and a FMIC. The problem I am having is that when I slightly put my foot into in second gear it is almost like the car doesn't want to move. Quite a few of the fins are bent up on the FMIC. Do you guys possibly think that I could be having a large boost leak because of it? My gauge says that I spike at 10psi, then it slowly creeps down to around 4-6psi. If not that could it possibly be a bad pump or restricted lines?

 

[jimsgsx]

Do a boost leak test. Everyone else will tell you to do the same. We could speculate on it forever but nothing is certain till you do a bLt. Then go from there.

 

[algomni]

Okay, thank you, I will do one tomorrow and post what happens

 

[NY 95 TSI AWD]

4-6 psi is really low. You should be seeing around 10. I would say you most likely have a few leaks, if you've never checked it. You should check the turbo for shaftplay as well.

 

[syboner]

i agree , also a nice easy way to find even small leaks during youre test is to spray soapy water anywhere there could possibly be a leak, i generaly test with about 20psi on anything.

if no leaks check your wastegate actuator position, may need adjusted a bit if the nut broke loose { assuming the 4g63t has an adjustable plunger arm}

 

[303_2G]

I had the same problem with my T28 if I boosted anything over 12-14psi it would spike (even to 25psi) then drop to 12-14psi again. After trying everything in the book including changing wastegate. It turned out to be a about 9 small cracks on the underside of the stock manifold.

 

[303_2G]

Also +1 for checking the wastegate actuator arm position. For about 3 weeks I couldn't boost past 6psi and then one day magically bumped to 14psi. Gotta love a car that fixes itself

 

[algomni]

Oh yeah, multiple leaks in the FMIC. I kinda figured so seeing as how beat up it was . I appreciate all the help guys! Thanks and have a Merry Christmas!

 

[Dsmkauai]

Is that tial bov recircualted? Kinda over kill for a t25 if you ask me!

 

[algomni]

Yeah, it is. But, I got the car like this .

 

[Dsmkauai]

You have to make sure they have the right spring in the tial bov for your setup. And if the fmic is leaking that much, might be time to replace.

 

[2ndGenOrDie]

Seems like a front mount on a t-25 is bigger than you need.... either way, boost leaks will cause that 100%. Fix that then BLT again. Boost leaks are a PITA