Do we suppose to have very smooth at idle with our TLs?But i can feel there is some vibration every second(just like heartbeat)Is that normal?Anyone else has the same problem?

 

Yes, this is normal. I feel a slight "loping" motion too. I wonder if it's the fluid-filled engine mounts allowing the engine to rock back and forth periodically.

 

My oo' TL does that too sometimes, but it goes away after two or three lopes or cycles.

 

I have a 2000 and it does that as well. I guess it is normal.

 

I had an Integer and the idle was like sleep,very smooth.Acura dealer said because it is a 4 cylinder engine.But i heard that Accord V6 also has very smooth idle.Is that true?

 

If the "loping" motion is a slight forward movement when your idling, in drive, with your foot on the brake, it's your air conditioning compressor clicking cycling on/off.
The engine compensates for the compressor's load by increasing the idle speed. I have noted that my brake pedal gives a little (pedal falls); I'm not sure why (vacuum change?)...

 

Nope, it's not the compressor (it feels different). The loping motion occurs without an audible change either. It just feels like you're in a boat rocking back and forth very slowly on the water.

 

Well, in warmer climates, your car will run more smooth, as the engine warms, especially...usually when the A/C complressor is on, it may run a drop rough, due to the added stress on the engine. Same thing applies to the winter time...the engine almost always runs a drop more rough(lil more vibration on the steering wheel than usual) than any other time of the year.
Ed