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Are you getting no boost at all or just spring boost? If your getting no boost at all I would suspect your waste gate or bypass valve is jammed open. Either that or a hose has come off but you woukd hear air russhing if so. Of course your turbo could be dead but that's not likely.
If it's the WGFV you would have spring (.4bar) boost.
i have know boost and there is know fault codes or boost leek could it be the WGFV? The car is an S2 coupe with RS2 stuff fitted was running fine apart from small oil leek on rear crank seal , done 3 k sins rebuild
You need to investigate your N75 WGFV and the boost/vacuum connection to the ECU via the "Moisture Trap".
Click on the appropriate lable in this live Engine Bay Device map for more info that should help you (all the labels are live links):
not the temp sensor , left the bat off and i had boost for about 5 mins the its gone still know codes gggrrrrrr
I don't know what a "bat" is that you left off
The fact that you had boost is encouraging.
Knock sensors would throw a code. No codes? Very unlikely that its knock sensors. I wouldn't tackle them quite yet.
Are you sure that the hose from the intake manifold to the moisture trap and from the moisture trap to the ECU are a) attached properly and b) without splits?
I would check them first at this point.
RS2'd 93 UrS4 5 spd sedan
94 UrS4 V8 6 spd manual avant
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