Ok so I have a 2001 S2k. Im having this problem where once the car gets warm, and you rev up, when the rpm's drop, the drop so low the car wants to stall out pretty much and you can feel it. It does it when you crank the car too, like on a warm crank, it will rev up then drop back down real low, spudder real bad then catch back up to around 900 rpm's. The spark plugs are new and all the coil packs are new btw. Any ideas? Ive hit the MAP sensor before, seemed to help for like 3 days, but not 100% sure if that was the problem.

 

Have you tried adjusting the idle per the FSM?

 

could a dirty map sensor give these symptoms - might be worth a second look?

 

^^^yes

one thing i can think of is to disconnect the map sensor, clean the plug s with electrical cleaner, reattach it after its dry, make sure all the screws are tight. also you can put zipties around the map sensor to ensure its not loose.

i know there is a how-to out there floating around the intra-webs