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why is my car making a heavy knock under hard acceleration with low traction?

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Old 12-07-2007, 10:07 AM
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Default why is my car making a heavy knock under hard acceleration with low traction?

doesn't seem to do any harm as it has happened a couple of times with no apparent damage. just curious what it is that is making the noise.
Old 12-07-2007, 10:35 AM
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Default esp, it's the brake or brakes in the rear applying pressure. terrible noise isn't it?!

hold down the esp button for a few seconds for a "hard" off.

if u only press it momentarily, it's just off. and not fully off.

now that it's cold... 1. your turbo is happy. and 2. your tires are teh suckage
Old 12-07-2007, 11:11 AM
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wait, you can turn ESP off off?
Old 12-07-2007, 12:36 PM
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Default you need a jig...

Welding a head tube in a Park stand?? You need a frame jig.
Old 12-07-2007, 03:11 PM
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Default from the front or back?

car vibrating.. going up and down al ittle?

Wheel hop.. EDL which can't be shut off is aplying the brakes to whatever wheel is spinning faster..

This causes the suspension to load up then it evens out regains traction and the suspension snaps back.. then slips again brakes apply agan.. goes on and on until you back off the throttle.
Old 12-07-2007, 09:08 PM
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Default Yep. But, I don't. As far as the banging....I thought that was the engine smacking against its

mounts as it rotates in low traction? And isn't the reason for a dogbone insert: to reduce that bang sound? Seems to me like it's wheel hop. And since my A3 is FWD, the whole front end bangs...

I guess I've been wrong about this for an entire year :shrugs: LOL!
Old 12-08-2007, 04:07 PM
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Default have one

not much need to weld the frame in the jig.
Old 12-19-2007, 07:17 PM
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Default Re: why is my car making a heavy knock under hard acceleration with low traction?

Is your car a dsg?
Old 12-23-2007, 10:27 AM
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no
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