Please help. I need a mustang ~GOD~ to get this figured out !!!

[MSTANGfromSN]

After returning everything to stock & double & triple checking everything it still ran piss poor.

But last night I went to go pick up a H-pipe from a buddy house (1hr drive one way) & 45 min into the drive it totally
went away... cleared up no more problems. Power was up, no hesitation, no misfire, no backfire. Then we shut it
down loaded up the car & started it up & it did the same damn thing!

Started running like a POS again got 45 min into the trip & then it cleared up & it was fine all the way home. I turned
it off once I got home, immediatly restarted it & it ran likea POS again!


What in the world could this be? I'm totally baffeled, right now I'm thinking the ECA is bad, the PIP is bad or the TFI
is bad.

Does this sound familiar to anyone?

BTW
Stock Cam, I haven't checked th O2's yet, no clouds, the ECT was replaced a couple days ago. I haven't checked the ACT, how do check that & the O2's?

Thanks Mike