Wandl

So I have a swb LS with right at 100k miles. drove great and got tires (same brand same model Continentals as the previous set) put on yesterday - right after that the car got noisier (mechanically, not because of the tires).

When I drive over 25-30mph it's like the car rattles...it starts "rougher" and is audibly noisier in idle now. The water bottle in my cup holder visibly shakes and did not do this before yesterday. What's weird I watched the guys install the tires, they never got close to anywhere under the hood..

Just to rule out the possibility, I had the tires remounted and rebalanced but of course same issue. Sounds like a noisy tranny or like I have an aftermarket muffler..have noticed a slight lag in acceleration (oil change at lexus 600 miles ago).

Sorry for the rant but any clues? I got new plugs, air filter, coolant flush, diff fluid flush within the past 3 weeks and had no issue with the car until yesterday.

My early suspicion is a motor mount or muffler-exhaust related issue?

Btw Roadfrog I followed your thread on acceleration - I think something similar is happening to mine

roadfrog

I sent you a PM Wandl.

RA032023

Almost every time (wish it was every time) I have an oil change, my '07 LS460 has an acceleration or idle issue. Every time, a battery disconnect for 30 mins corrects it.