[danieljag1]

I have a 2000 Mustang GT with a manual tranny and 145,000 miles. When the car is at idle it tends to be sort of shaky. The RPMs aren't jumping around or anything like that. It just feels off. I have replaced the IAC, fuel filter, and spark plugs within the last 3 months. If there's anything else it could be that I'm not thinking of please let me know.

 

[SilverBullet07]

ive heard piston slap is an issue with the 4.6

 

[danieljag1]

wouldnt i be able to hear that though? because theres no sounds, its just vibrations