1998 Audi A4 - Bad Turbo?
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1998 Audi A4 - Bad Turbo?
I have a 1998 audi a4 1.8t awd. I bought the car with the cel light on and it gives 2 codes.
1.) P1565 - Dirty Throttle Body
2.) P0422 - Faulty Cat Converter
The car passed emissions last Monday and has a new oil change. The lady who i bought the car form said the CEL came on after someone test drove it a few hours before i bought the car.
It blows white smoke out the exhaust when it is at idle. I put a boost gauge in the car today and when i am driving it seems to only go over the vac 0 maybe an inch.. i think the turbo is blown?
1.) P1565 - Dirty Throttle Body
2.) P0422 - Faulty Cat Converter
The car passed emissions last Monday and has a new oil change. The lady who i bought the car form said the CEL came on after someone test drove it a few hours before i bought the car.
It blows white smoke out the exhaust when it is at idle. I put a boost gauge in the car today and when i am driving it seems to only go over the vac 0 maybe an inch.. i think the turbo is blown?
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Joined: May 2002
Posts: 5,138
Likes: 4
From: Redmond WA
I have a 1998 audi a4 1.8t awd. I bought the car with the cel light on and it gives 2 codes.
1.) P1565 - Dirty Throttle Body
2.) P0422 - Faulty Cat Converter
The car passed emissions last Monday and has a new oil change. The lady who i bought the car form said the CEL came on after someone test drove it a few hours before i bought the car.
It blows white smoke out the exhaust when it is at idle. I put a boost gauge in the car today and when i am driving it seems to only go over the vac 0 maybe an inch.. i think the turbo is blown?
1.) P1565 - Dirty Throttle Body
2.) P0422 - Faulty Cat Converter
The car passed emissions last Monday and has a new oil change. The lady who i bought the car form said the CEL came on after someone test drove it a few hours before i bought the car.
It blows white smoke out the exhaust when it is at idle. I put a boost gauge in the car today and when i am driving it seems to only go over the vac 0 maybe an inch.. i think the turbo is blown?
P0422 could be a cat converter, but it could also be upstream at the turbo (impeding flow) causing a problem.
Can you hear the turbo spool, hope you bought it cheap. You should have 7-10psi at least. Check the wastegate, to see if it's closing.
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Have you tried a boost leak test??
Pete
Pete
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From: Redmond WA
If he's only getting 1 psi of boost, that's a pretty big leak I would expect more codes.
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Joined: Oct 2002
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Hard to argue with that. I'm curious because I have basically the same issue minus one pound of boost and minus the smoke. I've been all through the car and can't figure it out. Will be replacing the turbo this weekend.