PROBLEMS....
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1st Gear
Joined: Jul 2006
Posts: 397
From: st. pete, florida
PROBLEMS....
I have an 01 1.8T A4...lately when I've been driving it and I excelerate it stumbles a little and seems like it doesnt want to GO...can anyone help me with this problem, maybe some trouble shooting suggestions.
Thread Starter
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1st Gear
Joined: Jul 2006
Posts: 397
From: st. pete, florida
RE: PROBLEMS....
no. i took it to a mechanic...he said he couldnt feel anything and he also told me if its a slight bump bump bump on acceleration then its just the computer telling the turbo to not kick on. but the more i drive it through out the day it gets worse and worse...
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Joined: Jun 2006
Posts: 180
From:
RE: PROBLEMS....
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?
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?
Thread Starter
|
1st Gear
Joined: Jul 2006
Posts: 397
From: st. pete, florida
RE: PROBLEMS....
wow thanks man...what you just described is happening...so i'll replace the valve.
the one vacum leak i had my mechanic fixed when i took it to him a couple weeks ago..he said it showed up when he hooked up the diagnostics machine.
i thought plugs at first but i replaced them and nothing fixed it....
so i'm going to replace the DV and see what happens. thanks again....
the one vacum leak i had my mechanic fixed when i took it to him a couple weeks ago..he said it showed up when he hooked up the diagnostics machine.
i thought plugs at first but i replaced them and nothing fixed it....
so i'm going to replace the DV and see what happens. thanks again....
Thread Starter
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1st Gear
Joined: Jul 2006
Posts: 397
From: st. pete, florida
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?
what about this valve i found on ebay?
http://cgi.ebay.com/ebaymotors/AUDI-...QQcmdZViewItem
worth the purchase or not worth the purchase?
