Hesitation Problem

[Black87GT]

Ok, well it seems to run fine when cold, then when it gets warm (around operating temp.) it will hesitate under heavy throttle for a few seconds, then will just haul ass (power comes back) then it will do it again under heavy throttle, it was popping/hesitating/bucking, and we timed it and put a stock thermostat back in it (was 160) and it seems fine now except for the hesitation, so far ive tried all of this:
-egr valve
-o2 sensors
-iac
-timing
-tstat
-compression test (was fine)
-plug wires (msd s/c 8.5mm) (said to be good, but im not sure)
-plugs(said to be good, but im not sure)
-coil(said to be good, but im not sure)
anyone know what could be causing this hesitation?
help would be greatly appreciated!!!

[2001GTTT]

a miss in one of your cylinders, do you have any way to scan it?

check your wires, plugs, and all that stuff your not sure about.

[Black87GT]

you really think its a miss?

[INSANELY CRAZY]

check to see if any of your wires are layin near the headers, or if one of them may have a rubbed threw spot to where when your under load it's sparkin out on the header.

[fast4ord]

If not ignition, i'd say fuel/ fuel psi maybe. How long since last tuneup?

[fast4ord]

When its dark fire up the car, and look under hood to see if you have any arcing against header or what not.

[Black87GT]

ive checked for arcing and did not see anything, and yes i have 1-2 wires that have rubbed on the header and have white burns on them and you can see the inside of the wire, so i bought msd s/c 8.5mm wires and put them on and it didnt help the pop/bucking problem so i took them back (lol), but the pop/bucking is gone and now it just hesitates.. so idk what is wrong..

[DMmustangLX]

i got the same problem on my notch cant figure it out havent really looked into to much yet partin out my wrecked one rite now

[2001GTTT]

you really think its a miss?

yes because my car was doing the exact same thing and i had it scanned and thats what it was....misfire in cylinder 7 to be exact. lol. its because i had gotten water down in there....its all good now tho.

[John4cam]

Ignition module??? Have you checked it?

[Black87GT]

How do I check the ignition module?

[John4cam]

How do I check the ignition module?

Change it One less thing it could be, plus it's probly original

[Black87GT]

well, now this morning my car is popping again like the timing changed, could this mean that my distributer gear/ distributor itself is probably bad?

and another thing, should the rotor in my dizzy move at all when the car is off and trying to turn it by hand, because mine moves a little, and i dont know if that is normal or not??

[DMmustangLX]

thats not normal at all ur rotor in ur distributor should not move at all

[fast4ord]

Mine always has a little play in it.

[mhuckabee]

Ignition module??? Have you checked it?

X2 - I believe these are known to act up when the get hot, but work fine when the car is cold

[DMmustangLX]

that did happen to mine in my 92 went to hit it wot and it just died cooled down started up then would die put a new module on started up never had that prob again