poor cold start

I have a 5.0 mustang motor in a 46 truck it consists of an edelbrock intake a powerdyne supercharger e303 cam a 1990 ecm ,stock injectors. It fires and stalls umpteen times before it will idle i have tryed 3 differant mass air sensors all for the correct injectors ,3 iac motors ,i checked tps voltage at idle and a sweep ,i have used the correct hard stop adjustment only to make it worse ;once it reaches operating temp it will resart with ease i didnot try a coolant temp sensor yet but will tomorrow i also ordered a plate that has additional idle adjustment that goes between the tb. and the iac i have used them in the past but never had one this misserable cold the only thing it ever coded was mass air codes but seldom it runs and drives great after you baby sit it like a miss adjusted carberator any help would be greatly appreciated I also own a 90 mustang coupe with a paxton edelbrock heads and its as user friendly as it was new

with all that construction on the motor, you ever had a dyno tune?

i just re-read your post........did you say you have a supercharger with stock injectors?

Try getting a battery with more cold cranking amps.

ive done 8 differant boosted cars one was twin turbo they all started out with stock injectors and an FMU to boost pressure and my 90 coupe went 1179 at120mph with stock injectors i dont think thatsaa problem and we do have a 255lph pump in it fuel pressure and volume shouldnt be the problem thanks for the ideas though:banghead:

Have the tfi module tested.

if its not the stock injectors, then just get rid of them so your not robbing your motor potential HP. your fuel pump can only do so much, i would definitely have larger injectors for that kind of power.

this might help a little bit,

I have the same problem on my 64 ford falcon with an 1990 5.0 cobra EFI engine
http://autorepair.about.com/library/a/1e/bl143e.htm