blondie

In off throttle conditions there is a mysterious rattle eminating from somewhere up front. When coasting, no matter what gear i am in, the rattle is there and then around ~1000 rpm is stops abruptly. Applying slight prssure to the accelerator causes the rattle to disappear. Any ideas?


Also - when I first drive off there is an audible clicking noise that seems to match engine speed - it disappears after 10-20 seconds - if i drive away very slowly I can not here it. It does this even if the car is still warm after sitting for at least 15 minutes.

Any help would be greatly appreciated.

shane

1998 A4 1.8TQ

Phishie [K04]

damn squirrels.

WYSIWYG

could be one of the numerous heatshield in the engine bay

brian1

I have an MTM exhaust an there was a plate with a serial number spot welded to my exhaust's middle pipe that would rattle at 2,000 rpm. I found it bu hitting my exhaust with my fist and listening. Once I found it I just ripped it off with some pliers. Even if this isn't your problem, using the palm of your hand and smacking a few parts is a time proven test for finding rattles....

fussball.biturbo

could be one farther up in your situation... maybe

audi49

I have a '98 1.8TQ also. Ever since new, I've have had an intermittent shrill (not quite a rattle, faint, but obvious) off throttle, as the rpm drop through about 3000. Several dealer inquiries have been unsuccessful - primarily because it's intermittent. I had the new TT bypass valve installed last year, and I think that helped. In fact I haven't heard the sound for some time now. I think it is the bypass valve...

Tom

blondie

It's definitely a rattle - I guess i'll try digging around some more until i find the damn thing

Dead

Waste gate rod perhaps.

WYSIWYG

btw i've seen cases where the heatshield of the cat thats come off its welds