tranny problem.....maybe?

[lilm]

well i was coming home from work with the radio off and i stop at a stop light and i feel my car rattle no big deal i think its another car next to me with a large subwoofer now the light turns green and i go and i stop at another light and it does it agian now there is no one around me and im like WTF was that and about ten seconds later it does it again and this time my rpms drop a little. anyways it does this alot and it kinda feels like the tranny is dropping into gear but why would it do it mutiple times while stoped it does it maybe 3-4 times every ten seconds.

any ideas?

[Jai_Jai_Binks]

??? idle control sensor????

[drock03]

maybe plugs...my old Ford was running pretty rough at low RPM...replaced plugs and wires....back to smooth

[Assyrian]

again... this would be another good situation to check your TPS (Throttle Position Sensor)