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need help my 1.8T will only boost to 1psi any ideals ?

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Old 07-07-2003, 01:47 PM
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Default need help my 1.8T will only boost to 1psi any ideals ?

its has apr chip and an apr vac boost gauge
today on my a4 i saw the boost guage max out 1 psi, any ideals
Old 07-07-2003, 02:04 PM
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Default boost leak, turbo failure, limp mode, emcs? in valet mode maybe?

incorrectly installed boost gauge/faulty gauge? got a vag-com?
Old 07-07-2003, 02:08 PM
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Default Re: need help my 1.8T will only boost to 1psi any ideals ?

1 PSI? Check your wastegate actuator, if it moves around when you try to move it, get a spring
Old 07-07-2003, 02:40 PM
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Default Re: boost leak, turbo failure, limp mode, emcs? in valet mode maybe?

i dont have a vag, but i can put put to dealership, it seems like a boost leak but i checked it out and seemed fine
Old 07-07-2003, 02:42 PM
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Default Limp defaults to wastegate setting.....5 psi

sounds like something more serious...
Old 07-07-2003, 04:03 PM
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Default maybe a cut in the boost gauge line

it happen to me before.
Old 07-07-2003, 04:40 PM
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Default speaking of that, my friend's A4 has that problem. It only builds 5psi of boost!

I have a VAG-COM, and I have connected it a couple of times and I get a knock sensor code (not a knock detected, but something around the knock sensor, can't remember the actual code). Would this put the car into limp mode?

We spent a couple of hours yesterday diagnosing it, but never thought of the car being in limp mode. I guess we'll have to check it out again.
Old 07-07-2003, 08:05 PM
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Default Yes, it probably would..

the knock sensor is probaby bad. Not that expensive, but kind of a PITA to get a wench in there on it.
Old 07-08-2003, 03:01 PM
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Default

thanks for posting
Old 07-08-2003, 03:02 PM
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Default

the oil light came on today ? i checked the oil seemed fine,
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