I’m having trouble again with my 95, 5.2, auto, 2WD. It runs great when cold. After it has warmed up for a while it starts to surge, stumble, and eventually dies. If I let it sit and cool down for a long while, I can restart it and it runs fine again. The only code I have is for the AC clutch relay, 33.

When I start it up, the fuel pressure is 38, if my gauge is accurate. When it starts to stumble, the fuel pressure climbs to 50. I’ve done a lot of work on the electrical system. All the sensors are new and working. I have new PCM in it.

My thoughts are either the fuel pump, or injectors. Any other ideas?

 

I would start by changing out the crankshaft position sensor. I had nearly identical problem with my 93 5.2 v8 I just bought 2 months ago. Changed out every sensor including 02 sensor. Installed fuel pump, regulator plugs,wires and coil. All this and still did it. No codes were present. I forgot the one dam sensor that was like 30 bucks. Crankshaft position sensor. Replaced it and fixed the problem simple as that. If that’s not your problem, sounds like might be the computer. That was gonna be my last resort