Hi guys,
Hope you can help, I've searched thru the forum and read abt engine mounts but mine seems to be unique case:

My car (Bluebird Altima SSS-G '96 Auto with stock SR20DE) used to have bad engine vibration carried up to steering wheel and also to the dashboard. So, I suspected my engine mounts were out.. So I replaced all 3 mounts (front right (hydraulic type), front left & rear) with brand new OEM mounts.
And when I looked at the old one.. true enough the rubber compound in the old mounts were already hardened..
Now, the vibration had reduced around 70%.. but there is still noticable
vibration (still irritating) on the steering wheel and also on the
dashboard (especially when the A/C is on, gear engaged on D or R)..
But before that, I've done some engine tune up at a local Nissan dealer.. so I guess it's not the engine timing.. What else could cause the car to vibrate at idle?

Thanks alot !

What rpm is the engine idling at?
Some sort of miss caused by lack or fuel or spark or vacuum leak.
AFM problems.
Does the motor go ok when driving?

What rpm is the engine idling at?
Some sort of miss caused by lack or fuel or spark or vacuum leak.
AFM problems.
Does the motor go ok when driving?

The engine idles at around 800 - 850 rpm
When the A/C is ON / engage to D or R, it shoots up to 1100 but quickly adjusts back within 2-3 seconds.

When driving, the car runs great no problem.

I also noticed that whenever I get out of my car after a long drive, I could smell the fuel coming from the engine bay.. could this be fuel leak?

How do I diagnose ?

Thanks for the reply