whenever i start my car it will run fine for a bit. but when i come to a stop or let off the gas, the car idles for a bit then stalls. if i try to start it after that it will keep stalling unless i have my foot on the gas, if i let the rpm drop below 1500 the engine stalls. the car has H/C/I, injectors, throttle body and maf done to it. do you guys think i dyno tune will help solve this problem? any suggestions would be appreciated. another issue i have is that when i have the engine rev'd up and let off the gas, the rpm will stay at that rpm for a bit before it slowly comes down. but even as it comes down it will stay around 1500 for a few seconds before coming down to idle. when it comes down is when the car tends to stall.