Another one- What part is it?

[Dan's Auto Salvage]

Ok, I am looking under the pretty little engine covers, and forward and to the left (from the drivers seat looking forward) of the fuel filter housing, right next to the valve cover, there is a plug, 2 wires, same connector as ford O2 sensors, that plugs horizontally into the back of a sensor. What sensor is this, and why would it be un-plugged? It was intentional, but tht only difference with it plugged in is it turned off the CEL. Also, a rough idle is most likely a bad gp or gp relay correct? Thanks guys. Still looking for the fuel leak.
Dan Beyer

[mschn99]

can you get a pic of the connector and where it is and post it???\

Glow plugs will not cause a rough idle, only a hard or no start.....

[Dan's Auto Salvage]

Can't find my camera, probably still in the wife's car from yesterdays trip. As for the rough idle, what is a likely cause of that? Do all diesels have little to no power when cold? I assume so, but wanna be sure. it is real rough when cold, but great when warmed up. How long should I be warming it up before using it? Oh, and lastly, where is the weep hole on the lift pump?
Thanks!!!

[mschn99]

Originally Posted by Dan's Auto Salvage

Can't find my camera, probably still in the wife's car from yesterdays trip. As for the rough idle, what is a likely cause of that? Do all diesels have little to no power when cold? I assume so, but wanna be sure. it is real rough when cold, but great when warmed up. How long should I be warming it up before using it? Oh, and lastly, where is the weep hole on the lift pump?
Thanks!!!

the weep hole on the pump really isnt visable with the pump on the truck. Clean that area VERY well with brakeclean, and blow it dry. Then let it idle, playing with the throttle to increase fuel pressure if needed and keep checking for where the fuel comes out constantly. If it comes out from only right under the pump, that tells you its coming out of the weep hole.

No, that truck should be a tiny bit weaker cold, but not much, you should have to be paying attention pretty close to even notice it. The most common cause for lack of power only cold is a weak injector, although injector o rings can also cause this. u should be able to use a properly running motor virtually instantantly after start up, although a little warm up time (a couple mins) is benificial to ANY motor....especially the colder it gets. When its really cold you should let it warm up for at least ten minutes if you can just to get the oil thined out properly

[Dan's Auto Salvage]

Well, sounds like a weak injector or O-rings then for the power, because MAN she is lacking when cold. It is San Diego, sunny and 75 everyday here practically, but until the coolant gauge moves, there is no power and a rather rough idle. Also, between 2000 and 3000 r's it is rather hesitant, but at around 2900-3000 it really picks up. It pulled 6 tons on it's bed yesterday up some nasty long straight hills pretty easy. Thanks

[Dan's Auto Salvage]

Here is a link to the pic of the unknown part. It is the one with the wire coming out of the loom that is wrapped in red. By the way, it looks like it is coming from the pump (leaking fuel) when clean there is a slow steady streem from under it, leaking down into the valley. Ford or Napa to get a new one??

[Dan's Auto Salvage]

And here is the area the fuel is leaking from... (click for exploded view)has to be the pump-

[Dan's Auto Salvage]

Just took off the lift pump, it was defenitely leaking, the area around the weep hole was wet and brown from leakeage. Going to Ford right now to get a new one. $145 -14.50 for Military discount, my last one ever!
Still wondering what that plug is though........