[Black Sheep]

Bear with me on the noob shit, but I need to get this straighten out.

Fuel system is brand new, tank to the injectors. Literally everything. New ecm, TPS, IAC, new intake gaskets, cap, rotor, wires, motorcraft plugs, cleaned TB, no vacuum leaks, 100% stock down to the emissions. NO CODES. It sat for years and I replaced everything to get it running and up to spec.

It has a rough idle when I first start it. I can floor it and it clears out, but still has a hiccup or three till it gets up to temp. Once it's warm it generally runs fine. I've put about 600 miles on it hoping the new ecm may need to "learn" or something to that effect with no luck.

What am I missing or forgetting?

 

[Black Sheep]

The IAC works, I can unplug it and it wants to die. TPS is set to .9 volts (highest it can go) up to 4.2 volts WOT. I also replaced the coolant temp sensor and air intake temp sensor. Cleaned the throttle body and blades.

Same shit different day. Just bounces back from 600-1000 rpm at idle. It drives/run fine. No problem around town or cruise set at 70.

Once again, no codes. I'm leaning towards blocking off the EGR now.

How does one check for individual leaky injector if they're all on a rail?