Timing Belt got replaced

[markkri]

My Toyota Avalong XL 2000 got a new timing belt.
With the original timing belt the normal idling speed was 1000 rnd/min, with the new one it dropped to approximately 750 rnd/min. Plus I feel some shaking. Plus I feel a few 'brr' sounds when I turn off the car. What was done wrong?

[emt1134]

either they did not properly line up the gear teeth when installing the belt, or they installed something that they had to remove, incorrectly.

[markkri]

Thanks. Is that kind of work for a high level mechanics only?
I got my old belt, and the box from the new belt. That is a 'Conti Synchrobelt Kit'. The label on the box says 'TB257K1. Replaces:
Gates: TCK257
NAPA: 2522571
Goodyear: GTK0257'

Could you, please tell if the kit is right for Toyota Avalon 2000?
How to proove to them that something is wrong?

[emt1134]

I am not sure what kit is the right one. I would bring your car back to where you got the work done, and tell them something isn't right.. They should fix what they did wrong.

[Brian R.]

750 rpm is a good idle speed. Whatever is wrong, it is not the idle speed.

[denisond3]

I worked on an Avalon V6 (1995) that had one bad fuel injector. It was noticeable as soon as you put it in gear to drive around, and I could tell it was misifiring at an idle. But... the idle speed before the repair and after the repair was exactly the same. Just smoother with all cylinders working. I also replaced the timing belt and the two pulleys. That didnt change the idle speed at all. The computer was choosing the idle speed, not me. You might have a sticking throttle plate, or a poorly adjusted throttle cable, or a sticking idle air control valve. Those would affect the idle.