PROBLEMS....
Site Moderator
Joined: Aug 2004
Posts: 4,356
From: Jersey (orig. NorCal)
RE: PROBLEMS....
Check out the perormance sites on the Audi Links page. You can get better quality from a reputable source for less.
2nd Gear
Joined: Apr 2005
Posts: 836
From: Eastern/Western Massachusetts
RE: PROBLEMS....
ORIGINAL: RLB6
It's purpose is to purge boost coming from your turbo when you're not on the gas. Basically, when you shift or deccelerate, you're off the gas, therefore closing the throttle. if you're under boost at the time, the boost pressure traveling form the turbo to the intake has no where to go, but back down to the turbo, causing a surge which would eventually damage the turbo. the diverter valve does exactly as it's name, it diverts the boost pressure away and recirculates it back into the intake before the turbo.
So, now that we got that down, the dv has a nasty tendency to fail because its a plastic unit with a rubber diaphram. When this dv starts to fail, it starts leaking boost back into the intake, even on acceleration, which causes the engine not only to lose power, but cause slight bucking if the valve is intermittently failing. So, replace the valve and see if that fixes the problem, if not, then you'll have to look into other components that maybe failing, like the N75 valve, coil, plugs, etc..
BTW, the valve is like $35( I think ) for a stock unit. I suggest you purchase a dv for an audi TT, this one is refered to as the 710n valve or you can get a nice aftermarket unit from forge or hyperboost which runs up in the mid to high $100s.
Does this answer your question?
It's purpose is to purge boost coming from your turbo when you're not on the gas. Basically, when you shift or deccelerate, you're off the gas, therefore closing the throttle. if you're under boost at the time, the boost pressure traveling form the turbo to the intake has no where to go, but back down to the turbo, causing a surge which would eventually damage the turbo. the diverter valve does exactly as it's name, it diverts the boost pressure away and recirculates it back into the intake before the turbo.
So, now that we got that down, the dv has a nasty tendency to fail because its a plastic unit with a rubber diaphram. When this dv starts to fail, it starts leaking boost back into the intake, even on acceleration, which causes the engine not only to lose power, but cause slight bucking if the valve is intermittently failing. So, replace the valve and see if that fixes the problem, if not, then you'll have to look into other components that maybe failing, like the N75 valve, coil, plugs, etc..
BTW, the valve is like $35( I think ) for a stock unit. I suggest you purchase a dv for an audi TT, this one is refered to as the 710n valve or you can get a nice aftermarket unit from forge or hyperboost which runs up in the mid to high $100s.
Does this answer your question?
i think we have a new sticky [sm=icon_rock.gif]
2nd Gear
Joined: Aug 2005
Posts: 626
From:
RE: PROBLEMS....
ORIGINAL: david9999
Even though the check engine light isn't on, have the engine checked for codes and report them back. Autozone will pull the codes for free.
Even though the check engine light isn't on, have the engine checked for codes and report them back. Autozone will pull the codes for free.
1st Gear
Joined: Jun 2006
Posts: 179
RE: PROBLEMS....
ORIGINAL: thepirate
what about this valve i found on ebay?
http://cgi.ebay.com/ebaymotors/AUDI-...QQcmdZViewItem
worth the purchase or not worth the purchase?
ORIGINAL: RLB6
It's purpose is to purge boost coming from your turbo when you're not on the gas. Basically, when you shift or deccelerate, you're off the gas, therefore closing the throttle. if you're under boost at the time, the boost pressure traveling form the turbo to the intake has no where to go, but back down to the turbo, causing a surge which would eventually damage the turbo. the diverter valve does exactly as it's name, it diverts the boost pressure away and recirculates it back into the intake before the turbo.
So, now that we got that down, the dv has a nasty tendency to fail because its a plastic unit with a rubber diaphram. When this dv starts to fail, it starts leaking boost back into the intake, even on acceleration, which causes the engine not only to lose power, but cause slight bucking if the valve is intermittently failing. So, replace the valve and see if that fixes the problem, if not, then you'll have to look into other components that maybe failing, like the N75 valve, coil, plugs, etc..
BTW, the valve is like $35( I think ) for a stock unit. I suggest you purchase a dv for an audi TT, this one is refered to as the 710n valve or you can get a nice aftermarket unit from forge or hyperboost which runs up in the mid to high $100s.
Does this answer your question?
It's purpose is to purge boost coming from your turbo when you're not on the gas. Basically, when you shift or deccelerate, you're off the gas, therefore closing the throttle. if you're under boost at the time, the boost pressure traveling form the turbo to the intake has no where to go, but back down to the turbo, causing a surge which would eventually damage the turbo. the diverter valve does exactly as it's name, it diverts the boost pressure away and recirculates it back into the intake before the turbo.
So, now that we got that down, the dv has a nasty tendency to fail because its a plastic unit with a rubber diaphram. When this dv starts to fail, it starts leaking boost back into the intake, even on acceleration, which causes the engine not only to lose power, but cause slight bucking if the valve is intermittently failing. So, replace the valve and see if that fixes the problem, if not, then you'll have to look into other components that maybe failing, like the N75 valve, coil, plugs, etc..
BTW, the valve is like $35( I think ) for a stock unit. I suggest you purchase a dv for an audi TT, this one is refered to as the 710n valve or you can get a nice aftermarket unit from forge or hyperboost which runs up in the mid to high $100s.
Does this answer your question?
what about this valve i found on ebay?
http://cgi.ebay.com/ebaymotors/AUDI-...QQcmdZViewItem
worth the purchase or not worth the purchase?
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