Still having idling problems after H/C/I

Not sure what my next step should be. Finally got the car to stop throwing CEL's by plugging the charcoal canister back in (not hooked up otherwise). I still cannot get the car to hold and idle. With the engine cold, I can start it, it will hunt for a while, then idle pretty decent right around 800 rpm. Once you take it out on the road and warm it up, it will not try to idle at all on deceleration, just stalls out, at which point you have to hold the gas to the floor to get it to fire again, and then pedal it to keep it running.

After swapping in the new h/c/i engine, I did upgrade to 24lb. injectors, a 75mm Pro-M Maf, and a 65mm throttle body.

Where do I go from here? Could the TPS on my used TB be causing some of this?

mustanggt5pt0 said:

Could be the air idle control motor Before I got a new one, it would idle fine cold etc. If I ran to the store then came out and started it back up, it would surge and die. And sometimes as you describe, slowing at a stoplight and letting it idle on the way down, it would die on me then I'd have to pedal it to keep it going.

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I might try swapping the AIC motor since I have the old one still laying around from the old TB. Thanks.

time only said:

My own experiences with H/I/C upgrades is that if everything else match ( Injector,Mass Air Sensor etc,etc ). The placement or what in front of the Mass Air Sensor is the deal breaker. I will make sure there is a straight shot of tubing going into the MAS,No bend or any of angle tubing there,also you could try turning the MAS all the way up to get the best idle.
On my stock engine motor it works fine with a slight bend in the tubing going into the MAS,but when I change to the GT40 setup it give me hell until I put the cone filter directly in front of the MAS. Now I get myself a power pipe and it idle fine.

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What kind of MAF do you have? I actually just used the factory airbox and intake ducting with my new Pro-M; this may be part of the problem?