nologic98

2004 TL / AT

I feel a peculiar thump vibration - felt mostly via the pedals - when I start the car after it hasn't been running for a while. It happens after I shift into drive, usually in the first 30 seconds after moving. I don't notice it at any other time.

It almost feels like the entire motor is moving a centimeter or so, although this seems unlikely to me. Perhaps it's some sort of clutch engaging for an auxilliary system, like a fan or compressor?

It happens regularly, and it's quite disconcerting. Anyone know what it might be?

WickedWiz

I've noticed recently also...though mine is a 6sp. I believe it is a damper or flap that has something to do with the AC/Climate Control. We're all starting to get warmer weather, and instead of the Climate Control starting out with the heater running to warm the interior, it has to engage the A/C compressor to cool the interior.

I do plan on bringing it to the Service Managers attention when I take it in for the first service.

Animate

This has been addressed numerous times. It's the ABS performing a self-test.

SilverJ

I noticed the thump too..I seem to feel it right thru the clutch pedal..you automatic guys would prolly feel it thru the break pedal. ABS self test eh? Well thats good to know.

astro

this is the ABS system pressurizing and testing.

it's completely normal, and nothing to be worried about.

a search would have yielded the same results, much quicker

glg

Just got the car back from the dealer to have them look at this very thing, plus tires/seat memory issues. They told me this was a "normal characteristic of the vacuum controlled engine mounts." I dropped it off the night before so it was good and cold for tires and peddle thump. They replaced the power seat control unit to fix the memory issues and ordered new tires for the flat spotting so I don't think they would intestinally give me the run around with this but...anyone else ever hear of this?

rets

As I said, this question will be brought up at least once per week... we need help...

Since no one could edit their post after 5 mins, we cannot create the "normal" issue lists for all newbies' Qs. Meanwhile, all administrators and moderators are all busy, you guys have no time to handle/update/edit this kind of lists.
:banghead: