Hey everyone, new to this site, and I thought I would start off with a question. I have a 96 3/4 ton with a 7.3 and 200000 miles. I recently replaced the infamous injector wiring harness including the pigtails that plug into the valve cover gaskets. I also replaced the glow plug relay while I was at it. Now upon firing I am only running on what seems to be 7 cylinders, and there is oil in my fuel bowl and on my fuel filter. My guess is it could be a bad injector? I still want to pull the valve cover off and see if I may have missed a plug or something. Is there a way to pull the injector out and bench test it? Is there anyway an injector can get clogged? Any other ideas on why I don't have the cylinder firing? Oh I should also say it sat for 6 months prior to me trying to get it going. Ps. I know this has probably been covered but I'm mobile only right now and the search feature couldn't seem to find what I wanted.

 

Welcome to FTE !

If you have oil in the fuel bowl then you have bad injector orings.

You can't diy bench test these injectors.

Pull the valve cover and unplug A injector then start the truck if it makes a difference in the way it runs shut it off plug it back in a do another.
Keep repeating till you find the one that makes no difference

 

Ok cool, thanks for the welcome! Yeah, I think I have it narrowed down to one of the two in the back on the passenger side. I have heard a few different locals say you can rebuild injectors, so does a bad oring constitute a possible rebuild? The wallet is a little thin right now, and the cost of a new injector doesn't sound so good.

 

If you have a temp gun hit the ports on the exhaust manifolds the cold one is the one that's not firing. Or if the engine is cold use your hands and feel them on start up the cold one is the one that's not firing