P0470 code and lope mode
Lead Driver
Joined: Oct 2003
Posts: 8,476
Likes: 37
From: Madison, WI
There's a little Amish in all of us....
Dorman UVCH/gasket products are known for problems. Those are rather strange conditions, but the injector and GP circuits run right next to each other through those wires / connectors, so they're naturally a suspect. Not sure where to tell you to look next, other than damaged terminals as mentioned. If it were miswired, as has been reported about the Dorman products, you'd have problems 24/7.
The gaskets and pigtails were the Dorman ones. It seems to me that if they were the problem it would effect the way it runs all the time. Wouldn't burnt pins mess up the injector control? It runs fine until the GPR cycles off and runs fine if I disconnect the GPR
Thread Starter
|
Fleet Mechanic
Joined: May 2005
Posts: 1,739
Likes: 14
From: Vale, NC
The situation is worsening. I ran it a few days with the little wires from the GPR off and it was fine. Ran good and everything. But those days are over! CEL is on as soon as the GPR cycles off. Feels like I am running on 4 or 6 cylinders. Voltmeter dips up and down some of the time at idle - just like a wiggle really. Not much movement, kind of like something cycling off and on. It's in the driveway now until I can figure it out. I replaced the CPS just in case and no change. I have no idea about the IDM but am going to go and try to figure out where it is and what is does.
The pins on the UVCH look fine on the outside, so if there is anything it would have to be inside which doesn't make much sense to me. Still getting the P0470 code. Anyone think I should pay the $90 and replace that sensor?
Any ideas appreciated.
The pins on the UVCH look fine on the outside, so if there is anything it would have to be inside which doesn't make much sense to me. Still getting the P0470 code. Anyone think I should pay the $90 and replace that sensor?
Any ideas appreciated.
Thread Starter
|
Fleet Mechanic
Joined: May 2005
Posts: 1,739
Likes: 14
From: Vale, NC
Thread Starter
|
Fleet Mechanic
Joined: May 2005
Posts: 1,739
Likes: 14
From: Vale, NC
Thanks. I totally understand. I just have no clue where to go next.
Thread Starter
|
Fleet Mechanic
Joined: May 2005
Posts: 1,739
Likes: 14
From: Vale, NC
I talked to Aaron and he suggested disconnecting the UVCH pigtail while it is running crappy and see if I can isolate where. He thinks I have a short from the GP to the Injector pins there. It sounds like the back 2 cylinders on the passenger side are knocking like crazy when it happens so I am hopeful that is all it is. Won't get to check it until tomorrow. Thank goodness it is warmer and I can ride the Harley!
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Lead Driver
Joined: Oct 2003
Posts: 8,476
Likes: 37
From: Madison, WI
There isn't "a" diagram. It's a whole book. Called the EVTM - Electrical and Vacuum Troubleshooting Manual. Used ones come up fairly often on eBay, anywhere from $15 to $40. Worth every penny.
Thread Starter
|
Fleet Mechanic
Joined: May 2005
Posts: 1,739
Likes: 14
From: Vale, NC
Just an update for those following:
Truck is killing me! lol
Went out yesterday to try and start it so I could pull the connectors at the valve cover and see if it made any difference. No fuel pressure and batteries low. Put it on the charger and then today gave it a go. Still no fuel pressure. Went under and jumped across the oil pressure switch and got pressure (there was a hissing sound in the valley area and the pump was putting out 60 psi on my pressure regulator - not sure if that is just extra pressure bleeding off or some OTHER problem).
Truck started and same thing. Ran ok until GPR cycled off then like crap. I held that pedal around 1500 rpm and let it run a while to warm up. Once i let off it idled but really rough. Pulled the pigtails connectors on the passenger side and it killed the engine. Restarted. Pulled them on the driver's side and no difference! So, it seems the drivers side bank is not working.
Bill suggested I pull the IDM which I did and there was no water in it that I could tell. So, I am going to pull the valve cover tomorrow when it quits raining and see if I can find something in there. Bill said the IDM will shut down a bank if there is an electrical problem, so who knows.
Until tomorrow....
Truck is killing me! lol
Went out yesterday to try and start it so I could pull the connectors at the valve cover and see if it made any difference. No fuel pressure and batteries low. Put it on the charger and then today gave it a go. Still no fuel pressure. Went under and jumped across the oil pressure switch and got pressure (there was a hissing sound in the valley area and the pump was putting out 60 psi on my pressure regulator - not sure if that is just extra pressure bleeding off or some OTHER problem).
Truck started and same thing. Ran ok until GPR cycled off then like crap. I held that pedal around 1500 rpm and let it run a while to warm up. Once i let off it idled but really rough. Pulled the pigtails connectors on the passenger side and it killed the engine. Restarted. Pulled them on the driver's side and no difference! So, it seems the drivers side bank is not working.
Bill suggested I pull the IDM which I did and there was no water in it that I could tell. So, I am going to pull the valve cover tomorrow when it quits raining and see if I can find something in there. Bill said the IDM will shut down a bank if there is an electrical problem, so who knows.
Until tomorrow....