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View Full Version : b5 a41.8t trouble boosting after engine swap



LaCross
02-17-2014, 02:05 PM
I put a lower mileage engine into my 99 b5 AEB

Frankenturbo was installed with a MBC installed WITH the n75 valve ( This is ok to run on a stock tune as per FT)

The problem im having is when my car is about to go into boost (even 1 psi), i hear a "TSSSS" and i lose all power.

I double checked the vacuum lines and i believe everything is correct. ( I'll upload some pics soon)

Does anybody have any clue as to what this could be? I have no CEL

BrucexL33
02-17-2014, 02:26 PM
Check the intercooler hoses! if you are able to hear it it might be a large leak.

MetalMan
02-17-2014, 02:29 PM
What DV is in it?

LaCross
02-17-2014, 02:35 PM
http://imageshack.com/a/img844/4378/3g6h.jpg
http://imageshack.com/a/img36/4467/5xuv.jpg
http://imageshack.com/a/img593/7292/prw9.jpg
http://imageshack.com/a/img607/435/agjv.jpg
http://imageshack.com/a/img545/3842/wb4a.jpg
http://imageshack.com/a/img713/3751/xghi.jpg

LaCross
02-17-2014, 02:36 PM
710N, and i know that filter is bad, before anyone says something lol

Im sorry guys, i just went over it again and noticed that one of the guys helping me with the swap forgot to put a clamp on the compressor housing -__-

LaCross
02-17-2014, 07:20 PM
Ok, well not my exhaust just broke lol. It broke off about 3/4 of an inch after the 3 bolt flange that goes onto the turbo. The O2 sensor is on the broken side. Should i unplug the O2 sensor since the car will no longer be able to get an accurate reading?