Fox random stalling

[hammerhead]

They can be intermittent like that. Not really sure if it can be diagnosed until one day it just doesn't work at all.

[ChickenLips]

long shot, but maybe TFI? In my experience they're good, then bad, not intermittent but a quick thing to swap assuming you have a proven good spare.

[Frankie]

Sounds like TFI or PIP problem.
I'd pull the distributor and replace both.

And the igintion coil for good measure - a bad coil can kill a new TFI and a bad TFI can kill a new coil - best to just shotgun it and replace all 3.

[1BAD92LX]

I’ve tried multiple TFI’s. Has a new motorcraft coil.
Must be a resistance measurement of the pick up coil?

[Frankie]

The PIP is a semiconductor device. If it's suspect, you just have to replace it - resistance will only tell you if its burnt completely.

I bought the last couple i installed from RockAuto, had good luck with Standard Motor products ones.

[ZR]

IMHO...............start with confirming power in / power out of the ign switch is ok first.

[1BAD92LX]

Next time I drive it I’ll put my volt meter on the R/LG wire coming out of the ignition switch that powers the EEC relay. Hopefully it acts up

[ZR]

If it acts up at that wire, next check wire that feeds ign switch.
I'm assuming you've check n cleaned body and engine grounds?

[1BAD92LX]

There are two yellow wires at the ignition switch with all time 12v. Both seem to come from the starter solenoid for constant power. It’s stalls with both ignition switches I have.
And yes for cleaning grounds.

[ZR]

you tug on em at the solenoid to check for fusible link partially burnt?