i have 91 DA with a 92 motor and it has a wierd vibration at idle. my alt. is good, ive replaced the iacv, cleaned the fitv, seafoamed it, and still it vibrates? the only thing i can think of is ive got one motor mount thats shot and a small chip off the harmonic balancer. that i can think of.

 

oh yea and a full tune up. including dizzy cap, rotor button, 8.5mm wires, ngk plugs, oil change (mobil1 full syn with a qt of lucas), fuel filter, and lucas fuel inj. cleaner every 3 fillups.

 

werd! mount?

 

Check your mounts. If you have inserts , you have your answer.