Siamkickboxing

I got my engine back in its been bored to 306 and i got it running but it keeps stall till its warm at idle and its a 1994 mustang gt. i have it in this firing order 1-3-7-2-6-5-4-8 i am not sure if its for older style 5.0 though i need to adjust the valves a bit but i don't think that would make it stall out and it got no exhaust leaks cause i changed it all the way back maybe the mass air sensor or idle air control valve?

1BADASSLX

i would lean to the mass air flow.. if you have stock e7 heads there no adjustable.

marx91

run codes, but it sounds like the engine coolant temp. sensor is bad, that will cause it not to idle
on cold starts