Ok we got alot of sensors changed ....and truck was running great but today I took it on my first long trip since the3 repairs. I got about 30 miles from home and truck jerked one time and then when I looked it had cut itself off - this time I pulled over ....and cranked it right back up ...ran fine ...gauges all looked good - water is actually running cold but I have done all I know to do in that dept and I am getting heat. It proceeded to do this to me 4 more times in a 65 mile trip ...dont matter what speed your going ...when it decides to do it its the same every time. I acually popped the clutch the last time and it cut itself back on and went right back to running good. HELP cause this has many a friend of mine scratching there heads !!

1994 Ford Ranger - 4 cyl 2.1
New Ignition Modulator
New sensor for DPSE
New Temp sensor
New thermostat

No codes - passed these on scan once we replaced the DPSE ...tested EGR and it was functioning properly.

HELLLLP

Electrical connector is dirty some where still would still be my guess.
Check near the relays on the fender sounds like dropping power to on if them.