[jaimysessanna]

Now this Buick has been passed on to my mother, and it still is doing the same things it has before and I'm back on here to troubleshoot some more. (She just got rid of her 2000 Malibu with 221K on the clock, and might I add with a leaking intake gasket the whole time.) The Buick has a new fuel pump pushing the correct fuel pressure, bran new autolite plugs and wires, new sending unit, and new intake plenium and intake gaskets. Anyways, it starts up great, and will run great and idle. Then say you take it for a drive. It will stall when you either come to a stop, or when you are giving it a light amount of throttle. Usually before it stalls it will hesitate and jerk.

What could this be? My parents used to have a 91 LeSabre and my father was telling me about how the throttle plate or something used to get carboned up and he would have to clean it, he was also talking something about the IAC valve.

Any ideas anyone?