boost problems
on my 2001 A4 1.8T i'm having a problem with boost, i have a revo chip, the boost spikes to 20psi and starts droping and it only holds at aound 11-12 psi.
Replaced the N75J valve, and did not improve, after replacing the valve took the car for a boot to see what the results were and when i pulled back into the garage looked under the hood and when i looked the exhaust manifold and turbo were glowing red..."i did beat on the car on my test drive but i don't think that its normal for it to get that hot". any thoughts on this? thank you |
Re: boost problems
^ Pretty normal with a chip and a k03, you might want to look into cooling of your car after driving it hard
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Re: boost problems
Originally Posted by crazy1469
(Post 66355)
on my 2001 A4 1.8T i'm having a problem with boost, i have a revo chip, the boost spikes to 20psi and starts droping and it only holds at aound 11-12 psi.
As it stands without knowing that... it sounds like you have a major boost leak.. boost should only settle ~2-3 psi below spike...Start checking all hoses and the vac lines... |
Re: boost problems
Originally Posted by Audone
(Post 66357)
What are you reading at idle? (in Hg) Should be around -20...
As it stands without knowing that... it sounds like you have a major boost leak.. boost should only settle ~2-3 psi below spike...Start checking all hoses and the vac lines... |
Re: boost problems
You stand corrected ! The little K03 and mani will glow red after a nice run !! IN order to avoid turbo damage, just make sure you drive the car "mildly" for several minutes after pushing it or let it idle for a few minutes while parked before shutting it down.
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Re: boost problems
Originally Posted by Avantquattro
(Post 66372)
You stand corrected ! The little K03 and mani will glow red after a nice run !! IN order to avoid turbo damage, just make sure you drive the car "mildly" for several minutes after pushing it or let it idle for a few minutes while parked before shutting it down.
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Re: boost problems
Originally Posted by crazy1469
(Post 66374)
and what would you say to the boost droping so low, at 3000rpm i'm hiting full boost 18-20psi and then it drops to 10-12psi
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Re: boost problems
It just ocurred to me that perhaps you've got a bad DV?? Any odd noises like a honking sound ?
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Re: boost problems
Originally Posted by Avantquattro
(Post 66388)
I'm a WD40 duct tape kinda guy (fortunately, I have a great mechanic). My money is on a boost leak though ... have you vagged the car to see if there are any codes? Can you pressure test it to check for a boost leak ? Sorry that I can't be of more help :-(
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Re: boost problems
Originally Posted by Avantquattro
(Post 66390)
It just ocurred to me that perhaps you've got a bad DV??
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