John Cee
Junior Member
Hello Ram fans. I'm new to the forum.
I have an '02 Ram 1500 4.7L with 216k+ miles on it. A couple of days ago, I filled it with gas and drove it 10 miles home. The truck was running normally; i.e. no CEL and smoothly although the fuel gage does not work. I parked the truck and 5 minutes later went back to start it. It started, but was running very rough--chugging and sputtering. I gave it some throttle but even at higher revs it was rough and skipping including the smell of un-burnt fuel.
The next day I conducted some tests:
*Fuel pressure is at 51psi at idle; the pressure holds for over an hour (the length of my test time patience) after the vehicle is shut off
*I checked for voltage at each COP, 13.5+ at each
*I fixed a leak in the PCV system; cracked hose behind left valve cover
*I found no vacuum leaks
*I ohmed out each injector: all are between 12.3-12.4 ohms
*There were no codes until I disconnected the #1 COP (to test voltage) and started the engine. After that I've seen a couple codes: P0201, P0463. I've disconnected/reconnected the battery several times since and P0201 has not reappeared.
I'm really not sure where to go from here. Any suggestions would be greatly appreciated. Thank you.
I have an '02 Ram 1500 4.7L with 216k+ miles on it. A couple of days ago, I filled it with gas and drove it 10 miles home. The truck was running normally; i.e. no CEL and smoothly although the fuel gage does not work. I parked the truck and 5 minutes later went back to start it. It started, but was running very rough--chugging and sputtering. I gave it some throttle but even at higher revs it was rough and skipping including the smell of un-burnt fuel.
The next day I conducted some tests:
*Fuel pressure is at 51psi at idle; the pressure holds for over an hour (the length of my test time patience) after the vehicle is shut off
*I checked for voltage at each COP, 13.5+ at each
*I fixed a leak in the PCV system; cracked hose behind left valve cover
*I found no vacuum leaks
*I ohmed out each injector: all are between 12.3-12.4 ohms
*There were no codes until I disconnected the #1 COP (to test voltage) and started the engine. After that I've seen a couple codes: P0201, P0463. I've disconnected/reconnected the battery several times since and P0201 has not reappeared.
I'm really not sure where to go from here. Any suggestions would be greatly appreciated. Thank you.