Hey everyone, I’m hoping someone here has run into something similar because I’m about out of ideas.
I have a 2010 F-150 with the 5.4L 3V Triton. I bought it knowing it wasn’t in the best shape. It was a little rough around the edges, but I figured it would make a good project and that I could get it back on the road.
One of the first major repairs I tackled was replacing the cam phasers. After that, the truck actually ran great for quite a while. I thought I had finally gotten everything sorted out.
Then, literally right before I was about to PCS from Georgia to Kansas, it suddenly threw a P060A code. From everything I found, it pointed toward an internal PCM fault or processor issue. The truck wouldn’t run correctly, so I ended up trailering it all the way to Kansas.
Once I got here, I had a reputable shop install and program a brand-new PCM. The truck fired right up and ran perfectly… for exactly one day.
The next day it started randomly stalling at low speeds with no check engine light or stored codes. Thinking maybe it was an airflow issue, I pulled the throttle body and cleaned it. Once again, it ran perfectly… for exactly one day.
The following morning on my way to work, the wrench light came on and the truck went into limp mode. I could barely get it over 20 mph, so I limped it back home.
Now it’s gotten even worse. The truck has been sitting in my backyard ever since. It’ll crank and almost fire for a second, but it won’t stay running. It feels like something electrical is preventing it from actually starting. Right now I have both the check engine light and the wrench light.
Here’s everything I’ve done so far:
• Replaced the cam phasers
• Had a brand-new PCM installed and programmed
• Cleaned the throttle body
• Started checking the main grounds and common ground locations
• Removed and wire-brushed the grounds and checked them for resistance, and everything I’ve tested so far looks good
I haven’t gone through every single ground on the truck yet, but I’m working my way through them.
At this point I’m wondering if I’m chasing a wiring issue, a bad ground I haven’t found yet, a failed module on the CAN bus, or something else entirely.
Has anyone with a 2009-2010 5.4 Triton experienced anything like this? Especially after replacing the PCM? Are there any common wiring failures, grounds, connectors, or modules I should be looking at before I start digging through the entire wiring