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Poll: WUR?...Exhaust??...TURBO??...INTAKE TUNING??
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WUR?...Exhaust??...TURBO??...INTAKE TUNING??

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Join Date: Aug 2007
Posts: 402
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Exclamation Explosion..WUR?, Exhaust?..Fuel Mixture??

Just got my 75 S turbo 77 transplant back from the garage head gaskets done, valve job and throttle adjustment done....

As i drive slow and not going in to TURBO too hard everything is okay..

But as stepping on it, first gear okay,,,second i release gas to step clutch and go in to 3th gear...POOOOOPPPP...hughe explosion....

Right when i start to enjoy i hear some kind of gas cumulation on exhaust pipes...

Not the wastegate sound as it opens, but as if some kind of pressure is acumulated on the muffler...may be exhaust gases are returning in to turbo??

I had an air suction problem on intake, just changed gaskets, yesterday, went thru all the CIS Hoses, checked timming..but big BANG stills there...

WUR is giving me a headache as i stop the car when hot, i can not start it some times only by pushing it and engaging second gear the sleeper starts..

Is there a risk to crack the exhaust pipes and muffler??

Please help diagnose..or run tests to find the issue..

MKEDF, 911 78 SC (rebuilt), 75 S Turbooo!!
2001 Boxster (Sold, girl car), 2001 330CI Coupe, 2001 325I, 2001 C240 V6
2003 330 I F1 (E46), 2002 320 I F1 (E46), 1999 323 I (E46)
2001 Peugeot 406 Pinifarina Coupe, 2001 325 I (E46), 2000 328 I (E46)
Never Bought Audi or Cooper too expensive for what you get
Old 07-14-2008, 08:43 AM
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