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Author Topic: Idle issues, and more.  (Read 1476 times)
Terror_Flynn
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« on: June 02, 2015, 08:01:30 AM »

When I start the car (example: in the morning) I get an idle issue, it's jumping and I have to press the throttle pedal or else the engine dies. But after I drive a few feet all is back to normal.

Sometimes when I start the car and the idle is jumping and so on I also got no brakes, the brake pedal is stiff as of the car has lost the power brake assist. But all is back to normal when I drive the car a few feet.

I have checked with Vag-Com and I have no fault codes.

Car: Audi A4 B5 1.8t quattro -2001
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Audi A4 Avant 1.8t Quattro -2001 (AWT)
vwaudiguy
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« Reply #1 on: June 02, 2015, 08:41:54 AM »

Is it an automatic? Do you know if it has an electric vacuum pump?
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tjwasiak
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« Reply #2 on: June 02, 2015, 09:53:29 AM »

If I were you I would check it for vacuum leaks.
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Terror_Flynn
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« Reply #3 on: June 02, 2015, 12:38:56 PM »

No, it's an manual.
Yeah, that's my thought too, about a vacuum leak, any specific and usual place to check on these cars?

A bit unsettling that the power brake assist stops working when I have these idling problems.
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Audi A4 Avant 1.8t Quattro -2001 (AWT)
Jim_Coupe
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« Reply #4 on: November 23, 2016, 04:18:55 PM »

Check power brake hose.. could be a bad one way valve?
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E85oholic
adam-
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« Reply #5 on: November 24, 2016, 03:15:49 AM »

A vacuum leak.  Check one-way valves, check pipework leading to the servo.
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