when the car warm up it idles to low and the car vibrates what can that be

 

I see your other post about knocking sounds from your engine.

Give us more information on both threads. Like what rpm is the engine running that is too low?

Have you done any work, had an accident, or had something like oil loss with this car right before the problem started?

What work have you done on this car?

 

no accidents no leaks idles less the 1k i changed the spark plugs, spark plug wires, thermostat, changed the motor oil and tranny oil, alternator, added cold air intake the car has 170000 miles and when im at a stop light it idles low, when i start to accelerate it hesitates ; and the knocking when the car is in park and i rev the motor past 2000 rpms the knocking stops

 

Start by cleaning the throttle plate and with the engine running spray throttle body cleaner into the IACV hole located inside the throttle body near the plate. Manually rev the engine while doing this or the engine may stall. See if that helps.

 

There is a screen on the IAC that can get clogged and mess up your idle.

Once again, does the check engine light turn on while you are driving? Or is it always on? Have you checked for trouble codes? What is the rpm at low idle?