So my 3 year old project car is just about done and ready for DD time. BUT for some reason, it takes a couple tryies to turn it on. and once its on it actually idles funky. Sometimes if I try driving it with out letting it heat up it will just stall.

Once the car heats up and is at right temperature, it runs just fine, no problems.

I bought this car from a ricer almost 3 years ago. the parts on the poor thing were home made and really cheap. I've gone ahead and converted the whole thing back to stock.

Having said that, thats why Im I thought once everything was back to stock, it would run just fine with no problems. just like straight out of the factory.

Heres a list of what I've replaced on the car these past couple of months...
new fuel injectorS (4)
new wally 190 fuel pump
new Stock fuel regulator
new fuel lines
new spark plugs
new spark plug wires
new starter
new intake filter
new vacuum lines
new water pump and belt
new tensioner and idler and belts
new belts (all)
new timing belt and balance shaft belt
new radiator hoses
new alternater
and I had the guys at ECM rebuil/fix my ECU, there was something wrong with it

and I went back to the stock side mount intercooler
and the turbo and exhaust manifold were already stock

now what am i doing wrong? how come I still can't get this sick puppy running perfect?