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Can a PCM just go bad with age? My 94 has 280,000 miles, has had ongoing electrical issues since I bought it 2 years ago. Latest to crop up is the glow plug relay is not getting a consistent signal to activate at startup from the PCM. I can hook up ScanTech and activate the glow plug test -...

Close to losing what's left of my marbles. Been fighting problems in my engine harness since buying my truck almost two years ago. Kept getting error codes 13, 17, and 18 for fuel solenoid and optical sensor faults. Thought I had it tracked down to a bad I/P - replaced it and still had the...

I've developed a bad oil leak, seems to be coming from the driver's side valve cover gasket. Fabbed up a manometer and found the crankcase was under pressure at idle (pushed about 3/4" water in the tube), went back to "neutral" when I revved it to 1500 rpm. Was leaking at that point, so makes...

Now that I've got the truck running good and have bypassed the wastegate solenoid with a homebuilt turbomaster, I'm getting code 78 (wastegate solenoid fault) flashing on occasion. Any way to fool the ECM so a code doesn't flash?

Wondering what weight of oil is best for these trucks? The cap on the engine states 15W-40, seems awful heavy. Down here in Georgia, freezing temps are never an issue, would think a lighter weight oil would be better on the engine components. Thoughts?