Nissan sunny 2004 model engine vibration when AC is engaged.

[Shanmughan]

Nissan sunny Model 2004 Engine is vibrating heavily when AC is engaged, also in running with AC on.

Edited August 14, 2018 by Shanmughan
Previous question was not clear.

[Davy]

After a cold start, does the engine rev upto about 200 RPM and slowly come down to normal as the engine warms up? 

Also, when was your last fuel system clean up (tune) done? 

[Twin Turbo]

The engine may have an un-even run , made worse with the load of the a/c compressor.

what is the normal idle speed of the engine after warm up? when did you last replace the air filter?

check the ignition system/fuel injection system . and the engine+trans mounts.

get nu spark plugs

TT.