So, just out of curiosity, does anyone know if there is a direct relation between the oil pressure sending unit and the fuel system? My engine light is on and the original oil pressure gauge is disconnected, due to using a mechanical gauge. I'm hoping that maybe this has something to do with it?? I have looked at everything that everyone has suggested with the same results. I'm starting to think that the injectors and possibly the pump are failing.
First Welcome to OB, sounds like a good truck, and hopefully you can get this all sorted out.
I'd strongly suggest getting a Pyro on that truck as a minuimum and keeping an eye on those EGT temps.
As said Mel and Russ are the GO TO guys for IP and or injectors and such. Now seeing as your in Oregon, Russ is in that state and could be close by I have no idea as I don't know that area I'm a Canuckleheaded Canadian!
Take a few minutes to go through the FAQ for IDI's and the Tech section too, lots of great info in there for you as a new to diesel guy.
Also peek at the Hall of Shame so your hard earned $$$ don't depart into hands of unscrupulous vendors known to well...known to not be the best at either providing service or quality parts.
For the ENGINE LIGHT being on, sounds to me like the 242 deg engine temp sensor tripped or the wiring to it is shorting out. This is part of the two part temperature sensing system Ford used.
There is a Large temp sensor in the front of the HEAD on the Drivers side, if it's faulty or wiring is shorting out it will cause the engine light to come on.
I'll see about pics later for you to better provide location.
Others will chime in with opinions on whats up with yer engine light but my suspicion is the sender is kaput!
Here is Gary's response in another thread about the same thing...in essense
I agree with the above posting. Heres why.. The dash temp gauge is driven by two differant senders. Mainly its driven by the small sender located just to the drivers side of the injection pump. Then when the coolant temp reaches 242 degrees the large sender found in the front of the drivers head closes and the dash gauge will peg over to way past hot. To test this just remove that wire and ground the wire. The dash gauge will peg no matter hot engine or ice cold engine. You can try removing the wire to that large sender and isee if the problem continues.. If it does not then your large sender is going bad..
Again, welcome to OB
Al