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S4 is bucking and stalling. Check engine light and EPC light flash on and off. Whats wrong? HELP!!

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Old 10-21-2000, 03:21 PM
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Default S4 is bucking and stalling. Check engine light and EPC light flash on and off. Whats wrong? HELP!!

It does not appear to be the TBB. Have not checked to F-hose but it seems more complex. No loss of power when running right. All of a sudden the car starts bucking and then dies. Restarts are difficult but then it eventually starts, only to stall once again. Any one know what might be the problem? I thought it might be low on gas, but it still does it on a full tank. Please help!!!!!
Old 10-21-2000, 03:25 PM
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Default Check your DTC's!!

you sure all your hoses are well seated, etc? All the vacuum hoses, as well?

-T
Old 10-21-2000, 03:33 PM
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Default I dont have a VAG tool. I'll have to wait til Monday to check codes. Glad I have my trusty M3.

Thanks for your help. Im going to check the vacuum hoses right now.
Old 10-21-2000, 03:35 PM
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Default In my case similar symptoms were preceeded by a TB failure...

check your DTC's for:

17943 P1545 Throttle Position Control Malfunction - Intermittent

17976 P1568 Idle Speed Control Throttle Position Mechanical Malfunction

My throttle body was replaced, car has not done this since.

/dan
Old 10-21-2000, 03:49 PM
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Default Re: I had the samething happen to me, but my car didn't stall

My car felt like it was about to stall when I press on the gas hard and goes back to normal if I easy off it. My deal found a intercooler hose has poped off and the car was running rich. Before it happened my boost gauge showed 20psi. I say take the chip out and have the dealer check it out! And good luck!
Old 10-21-2000, 04:13 PM
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Thanks dan.
Old 10-21-2000, 04:17 PM
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I checked the hoses, the TBB but not the lower intercooler piping. Looks like a trip to the dealer.
Old 10-21-2000, 04:29 PM
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It might be a loose chip in the ECU if it runs good sometimes.
Old 10-21-2000, 10:02 PM
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I'll install my stock before going in for service. Lets hope something works.
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