When my car is cold and i start it, it will stay running, but after its been warmed up and i start it, i have to rev up the engine so it will stay running or it will just die out on me...can anyone give me some suggestions...thanks

 

Check the engine oxygen sensor. since it's occuring after the car warms up...i'm thinking that there is a problem switching from open loop to closed loop
when the car is warming up...it's running on open loop off mapped data.
when it warms up and switches to closed loop, the oxygen sensor is giving bad voltages or some kind of bad readings.
just my guess.

 

x2

 

Also check the MAF. I had the same problem (low/rough idle when warm) and was able to get a new MAF (through warranty, luckily!) Usually, the MAF just requires cleaning. Apparently, my MAF was actually bad (which seems to be somewhat common here).

 

For a third possibility, after installing my plenum spacer I was having the exact same problem, and it appeared to be caused by vacuum leak from the plenum bolts not being tightened all the way.

 

anyone think it could be the throttle positioning sensor? i just got a service engine soon light and when i did the diagnostics, it said that my TPS was bad..

 

Just incase anybody was wondering, i changed my throttle body and sensor and it fixxed the problem, my "service engine soon" light is also gone...thanks anyway for the suggestions