k5ranger

1994 5.2 175k
all the problems occur after within 10 minutes of driving the jeep:
* stalls, as though a switch was thrown. no stuttering, no bucking, no warning...it just dies. It will crank right back up and drive with no problems.
* hesitation/bucking when running around 40 mph (city roads) occasionally until engine warms up.
*occasional rough idle at start up.

Within the past three years i have replaced the IAC. crank sensor, cam sensor, cap, rotor and wires and coil.( all these parts came from Autozone). Yesterday i tested the TPS with volt meter and found no issues. ALso tried wiggling the PCM wires and unit while running to see if it stalls but nothing. Cleaned throttle body and ran seafoam thru brake booster.
once the engine has ran for 10 minutes or so it does fine. motor feels strong.
The stalling has only happened twice in the past 6 months, both times within a block of my house when leaving for work. The hesitation while driving is becoming more of a daily issue.

carcomputerexchange

You might want to get the PCM checked out. If the diagnosis comes back that you need to replace it, we're here for you.

k5ranger

after testing the sensors again I decided to remove the PCM. I found what I first thought were corroded male pins but soon discovered it was "dirt" or something in several of the pin pockets and on the pins. I cleaned these with contact cleaner, put it back together and have had no problems since.

wingless

It is possible the three PCM capacitors have deteriorated making replacement a good choice.

Here is my PCM capacitor replacement.