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Dodge guy NEEDs Help with a 01 7.3,
I am not even sure where to start on this truck. As I only know what my brother in law has told me about and the 4 hours I spent on it last night trying to get it to run. First off its a 2001 7.3 with about 40,000 miles on it. The truck is mint accept it has a Veggy Oil kit on it. Not a fan of those after seeing how dirty the fuel system can get.
Last week he had a issue with the truck losing power when running on Diesel. So he changed the fuel filter and everything was fine. Yesterday he had a issue with it lossing power again running on Diesel going to work. ON his way home he started it on Diesel and then switched to Veggy Oil after it was up to temp. Before he gets home he has to switch back to Diesel to get the Veggy Oil out of the system. After he switched to Diesel the truck started to lose power again with in a Minute and then died. He had to get a buddy to drag him home.
Now here is where I need to describe the Fuel system as it has changed due to the Veggy Oil kit. It has a soleniod valve kit under the hood for switching, Diesel or Oil. They removed the lift pump from under the truck. and mounted it after the Valve Pack. So now the Lift pump does not push diesel to the stock fuel filter but sucks it threw the filter. The diesel fuel route from the fuel tank runs to the filter, then to the Valve pack and to the Lift Pump. I pulled off the soleniods to clean them and free them up a bit. They where some what dirty. I pulled some of the lines off to see if they where blocked. I notice that the line coming from the Fuel Filter felt blocked. I could not suck or blow threw it. This I believed to be the issue. I pull the filter out and that black tube run up along with the heating element out of it. It seemed that that spring loaded valve inside was stuck. Heres something I need yall to describe to me. When you pull the filter lid off that valve should shut to keep fuel from draining back, correct?. Then when you put the lid back on the tit sticking down form the lid should open that valve to let fuel in when there is a demand for it, correct?
With the fuel filter back together and if you try to suck fuel through the line if almost feels like I am sucking air but if you try really hard you will get a mouth full of diesel (taste great), so I am torn between, is it sucking air from some place, is something jacked up inside of the filter housing or is it a bad lift pump.
The truck wants to start but there is no fuel there to get it going, If by chance there is enough fuel it has that loud knock but I can only imagine that is it straving for fuel.
Another thing I did bypass the valve pack all together and run the fuel line from the filter to the Lift Pump to see if that made a difference. Nope.
Anyhelp would be great guys. If any of you know a good 7.3 PSD mechanic in the Humble Tx. area this would be very helpful. Please no Ford acronyms, you will lose past PSD.
12' F-350 FX4 Lariat STOCK, Completely Stock, and Staying Stock.