Rough idling

[Reksanity]

I just picked up a 07 4.0 mustang with 90k miles and I noticed it is idling rough, I can't figure out why. My mustang will vibrate kinda bad ans sometimes the car will shake for 1 or 2 seconds while idling.

 

[46addict]

So it shakes for 2 seconds and returns to normal? Is the engine rpm fluctuating when this happens?

 

[nawagner]

Clean the MAF and the throttle body.