Low Rpm's problem

[sohc240]

Ok I used the search and I'm not sure that my problem is the same as those. Here's the problem, when I diconnect the battery and let the computer reset the car runs fine and sits at 750. As soon as I turn the car off and turn it on the rpm's go to 500. However this only happens in D(2,3), if I put it in N or P its fine. Any info will help thanx.

[96_S14_SE]

Its supposed to idle at 750 in N or park and at about 550-500 in drive. The drive train is under load in an auto with it in drive or reverse and idling, thus the rpm drop, even if it is minor... Its the reason why when you let off your brakes the car moves forward.

[sohc240]

oh ok so now I'm just stupid...J/k...thanks for the info..I had a 5 spd before so I wasn't sure

[TomsMR2]

the problem is the auto. get it swapped out for a manual transmission asap

the drop sounds normal tho, i wouldnt worry.. unless it starts dipping so low that you're on the brink of stalling.

if it IS idling rough at 500rpm (seems like its bogging etc), then check the timing.

[hazardous240]

sounds like my auto 240, and i dont think there is anything wrong with auto. (just my lil opinion)