Too much boost!

[PSU 98]

So I recently got my car back from the garage with a rebuilt trans. Since the drive home, I noticed that it was spooling up super quick - anything over quarter throttle and I would be at 15+ psi according to the stock gauge. Today I blew the intake hose off the intercooler, so I know it's way too much. Any ideas on the cause and where to start fixing? Only other recent mod is a Hooker catback.

 

[Spooln1]

Maybe best to post what your set up is, what was done to the trans. Was there a convertor change? Folks might be able to give a better guess that way.

 

[TurboBob]

inspect the wastegate hoses before you break something. These are the small "vaccuum hoses" that feed from the turbo compressor (intake side), thru a "Y", to the wastegate actuator under the turbo. These hoses fail with age and a failure results in extremely high boost (and thats bad.....)

Keep your foot out of it until you get it fixed.

Bob

 

[PSU 98]

Thanks Bob. I have to give everything a once-over when I get it back home today.
The trans was just rebuilt to stock specs, no big converter or anything.

 

[Slow91z]

Check that tbe wastegate isn't stuck as well.

 

[PSU 98]

With the turbo shield off I noticed that one of the hoses from the Y-fitting is hanging loose. Of course, I reconnected it. Think this was the origin of the problem, or another "casualty" of something else?

 

[Rafs-T-Type]

I would think it's the cause. You should zip-tie the hoses on for good measure.

 

[PSU 98]

After a quick shake-down run, it all seems to be good. I'll keep an eye on it over the next few days to be sure. Not sure how that line could have gotten disconnected doing trans work

 

[87chrisss]

yea same happen to me i stepped on the car and i looked down saw the needle behind 30psi car felt fast but then i was brought back to reality when i reco'd the vacuum hose on the actuator

 

[PSU 98]

Yeah it was all fun and games until I blew the intercooler off

 

[S10xGN]

inspect the wastegate hoses before you break something. These are the small "vaccuum hoses" that feed from the turbo compressor (intake side), thru a "Y", to the wastegate actuator under the turbo. These hoses fail with age and a failure results in extremely high boost (and thats bad.....)

Keep your foot out of it until you get it fixed.

Bob

Bingo! Mine was heat related, but that will not happen again.

yea same happen to me i stepped on the car and i looked down saw the needle behind 30psi car felt fast but then i was brought back to reality when i reco'd the vacuum hose on the actuator

You're lucky, I rattled my bearings bad enough the crank needed turning.

 

[HelloBozos]

I cracked a block when stock boost line slid off at WOT,(saw 30psi from gt71 on 109)....

High Temp wire ties are a Must!!!! they aren't pretty but sure worth $2000 rebuild for $.05 part