This might be a silly question but im pretty sure i have a motor mount bad because I have a horrible shake when i am stopped or sitting there idling. But my question is would a bad motor mount cause my car to have a bad idle especially when my fans kick on. Any advise will help and i am also going to be changing all of them at once.

 

A bad idle? Why don't you visually inspect the ones you can - have someone rev the motor while the hood is popped and you're looking. Bad mounts would absolutely make the motor move around.

If your rough idle is due to something else, I'd look into the FITV/IACV/TB cleaning thread and start there.

 

If the idle is rough in Neutral or Park, then it is an idle issue.
If the car is an automatic and the engine feels like a rough idle in any gear, then it is most likely the engine mount or controls for the engine mount are faulty.

 

I should have mentioned that i have cleaned the throttle body, iac, fitv, i have also had the valves adjusted timing checked, new plugs and wires new cap and rotor, new o-ring on the distributor, i have cleaned the egr and passages, you name it i have done it for the idle but like i said it shakes to beat the bandit when i am parked in neutral or stopped at a stop light.

 

I had a bad vibration when stopped in drive whenever the a/c kicked on.

One thing that helped a lot was upgrading my NGK plugs to NGK (4363) PZFR5F-11 Laser Platinum Spark Plug. Another Honda owner suggested it to me after it helped his car. Surprisingly it made a big difference.

I also recently changed a broken mount in front. Front one is pretty easy to check and replace if bad.

 

The weird thing is when i start it up and reverse when i stop reversing and about to go forward the car will almost die every time. Also another weird thing is when i turn my ac on the car will actually stop shacking really bad. I'm thinking it doing that because the idle is idling around 900 rpms instead of 750 rpm. Also this is a 5 speed car too.

 

Well I changed all the motor mounts and it is still shaking pretty bad. Any suggestions?

 

Are the FITV and IACV performing properly? My IACV is clean enough to eat out of but is the source of an electronic hum when the engine is running, its likely jammed and will be swapped out with one from the junkyard after I get my timing system back together. I discovered a half torn driver's engine mount but suspect that will not be the source of my idle vibration.