Truck dies
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Professional
Joined: Mar 2020
Posts: 157
Likes: 21
From: Orangevale, Ca
Truck dies
For a couple months now, my 95, 5.2, 2WD, automatic has been dying. It happens on the freeway, at stops, during idling. It just quits, no spark. Fuel system is fine. Pressure is about 40 and steady. So far I have:
Replaced
Coil
Coil wire to the distributor
Distributor cap
Rotor
Distributor pick up (cam sensor)
ASD and fuel pump relays
Crank position sensor
The splice under the fuse box looked ok but I redid it anyway.
I checked the grounds
Checked wiring to and from the PCM
My daughter drove it a couple days ago. It died and wouldn’t restart. When I got there to check on it, there was no power to the starter, dash lights, anything, no matter what position the key was in (ACC, on, run, start). I pulled out the ignition switch. It looked as if two areas of the connector were fried; the Pk/bk circuit A2, and the Bk/or circuit A22. I replaced the ignition switch. I get power now. It starts, but still dies.
The only other problem I’ve had was the blower fan dying, then coming back to life.
I’m thinking about replacing the PCM next unless anyone has some suggestions.
Tom
Replaced
Coil
Coil wire to the distributor
Distributor cap
Rotor
Distributor pick up (cam sensor)
ASD and fuel pump relays
Crank position sensor
The splice under the fuse box looked ok but I redid it anyway.
I checked the grounds
Checked wiring to and from the PCM
My daughter drove it a couple days ago. It died and wouldn’t restart. When I got there to check on it, there was no power to the starter, dash lights, anything, no matter what position the key was in (ACC, on, run, start). I pulled out the ignition switch. It looked as if two areas of the connector were fried; the Pk/bk circuit A2, and the Bk/or circuit A22. I replaced the ignition switch. I get power now. It starts, but still dies.
The only other problem I’ve had was the blower fan dying, then coming back to life.
I’m thinking about replacing the PCM next unless anyone has some suggestions.
Tom
Record Breaker
Joined: Nov 2015
Posts: 2,230
Likes: 473
From: North Carolina
Same thing happened to my '93, 5.2L, Dakota and the culprit was the ECM, specifically the microprocessor inside the ECM. It was deemed inoperable by a refurbisher so I had to get a complete replacement. The refurbished replacement arrived and it did not work. Didn't even crank the engine. The refurbisher sent another one and it worked fine and has ever since (5 years and 15,000 miles ago). Only exception was the voltage regulator in the ECM did not work. Instead of going for a third replacement, I took HYs advice and installed an external voltage regulator and bypassed the one in the ECM. The point here is that finding a suitable replacement isn't ironclad. You can go through refurbishers and still have problems. You can get them from boneyards without any idea of their condition. You can get one off EBay and same thing.. I feel you can get a good one but you may need some patience.
