I put my MSD blaster ss coil on this evening and it ran better but it didn't fix the problem so I'm going to go get an ignitor tomorrow

little to far vor me i was thinking if you where close i have a spare coil and igniter       off topic have you herd of the wee tee farm? i mix potting soil for them at my work

try unplugging speedometer, sounds crazy I know but its a ez test. if your problem goes away let me know.

Unplug the speed sensor? Lol!

Is the wee tee farm? Is it in independence? The module was a waste of 90 bucks but I knew it would

Thanks fordguy. I put a light on the coil wire and it is cutting out a little and when it goes dead it looks like it is a solid light on my timing light. I also put the spark pick-up on every wire and it sparks at tdc with every wire. And it has a very fast spark for being at idle. It is staging a little, hanging at 1500rpm and then it just drops! I will check the fuel pressure when it dies for a second.

Stop getting overwhelmed by this and check the regular simple stuff first.

Check the + voltage going to the coil, see if it's dropping to 0

Wild

 
 did you try unplugging the speedometer? that was a serious post, I know an old snow bird that could not get his 4door to run right until he unplugged it, he spent countless hours on it  until he figured that out, something to do with the computer interface maybe? now it runs perfect. ez test......
I know it sounds nuts but he swears by it!

It didn't do the trick! I'm pulling my hair out! Thanks for the input!

Could it be the ignition switch not making constant
contact and cutting the power to the ignition system / coil?

Wild

I got another 4 door out here with alot of the same gremilins buddy tried everything, finally a toolbox,engine hoist and a 2.0 liter will fix the problem. LoL!!

Hey wild, I did think of that too but it has steady voltage,fuel pressure and alt voltage while doing the cut out. When I put the timing light on the coil wire it was showing some intermittent flashing that whent away when I unplugged the TPS, it runs good now. The voltage to the fuel pump is staying up too. It could be another sensor? But I don't know which one. I'm done, my back can't take any more bending over the hood! I had the computer shipped off and it tested good. I guess I don't understand why it would run much better without the tps hooked up! This all came on one day while driving thru town! If somebody wouldn't mind looking at it to see what it is doing, I would appreciate it!

Good one Jluck! I was thinking the same thing! I might megasquirt it! For some reason the computer is leaning out the engine when I back probed the oxygen sensor! The voltage was going from .18 to .83.

Have you taken of the distributor cap to look for something in the body
of the distributor? that year might have a reluctor wheel that is being
fouled up by a foreign object floating around in there

Wild

Good one Jluck! I was thinking the same thing! I might megasquirt it! For some reason the computer is leaning out the engine when I back probed the oxygen sensor! The voltage was going from .18 to .83.

The sensor interface is very high impedance, putting a multi-meter across the sensor may well affect the voltage. Do you know the impedance of the meter?