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Looks good! I just eyeballed the tires, the picture is very dark and can't really see the wheels :) There are several check valved and just to make sure I pull the right ones, I think you are talking about the two marked in the attached picture?

Ok, that makes things easier. Thanks!

And what do you recommend as a good parts cleaner? I didn't rinse/ clean the fuel filter casing with anything, just drained the diesel from inside, but I feel that maybe I should clean it/ rinse it with something, but I don't want to introduce any contaminants, what is the best?

Got it! I appreciate it! If I understand this correctly, you are saying to remove them to see if it fixes the problem, but then eventually replace them with new ones? BTW, your truck looks very good, what tires do you have on, 40/13.5?

Are the two check valves looking like these? Is it OK if I replace them instead of bypassing them? I am looking to find them.

Ok, I have been doing a lot of reading on the forum and read about 54A being unplugged from the IP, but from looking at the schematics it looks like 54A powers the fuel solenoid, so please disregard that comment. How about using the screw on top of the fuel filter to purge the air? Is that a...

Ok, I have been doing a lot of reading on the forum and read about 54A being unplugged from the IP, but from looking at the schematics it looks like 54A powers the fuel solenoid, so please disregard that comment. How about using the screw on top of the fuel filter to purge the air? Is that a...

I was just comparing it with the new one I installed and actually that's very good news for the IP. Regarding purging the air in the fuel system, I noticed a screw on top of the fuel output line from the fuel filter, could I use that to let the air out while cranking the engine and tighten...

Just a quick update on the fuel filter and water separator...the fuel filter is busted on the outside but the water separator seems OK, not very dirty, which should be good news for the IP from what I read around the forum. I am also looking to replace the two inline filters, I read...

That's good news, with all the fuel system issues I am having, I didn't want to leave anything unchecked, and now that's one less thing to worry about, Thanks!

Got it! I think I found the hole, it's the only one around the tank, and the grommet looks like it would fit in. I will look for the matching connectors on the other side. Thank you! Any idea where the 4 wire connector from the fuel filter (picture below) should go?

Thank you! I am going with that premise for now, and as I removed the fuel filter there was another cut/ leak in the water release line. The main leak seems to come from the fuel pump line itself, maybe on both sides, hopefully not from the fuel pump, which appears to be dry:

The breaks seems to work normally, didn't check it specifically yet besides trying to stop hard and seeing that they hold well, but they are on the list, right now I am obssesed with the engine issues :) The truck showed about 7,000 miles which I tend to believe they are real because the...

The windshield fluid tank is also disconnected with no cable or connectors visible for reattachment, but also nothing seems to be cut (besides the one wire I mentioned earlier) so could it be a whole harness missing? Maybe that would connect to the fuel sensor as well?

Yes, I did fill up the tank with fresh diesel and drove it around for about 50 miles or so, some on the freeway at 80mph (maxed out the spedometer, didn't check with the GPS yet), thinking like you said to get things to loosen up. The engine sounds a lot better with a lower tone than before...

Found them! That was great info! Thank you! Definitely there is something going on with the fuel filter, the moment I removed the two bolts and tried to move it around, it started to leak from the bottom, and it goes to the theory that air is getting into the fuel system. I don't know if the...

The alternator charges the batteries OK, the mean voltage is about 28.5VDC with a ripple of 2.5V (please see scope capture, the sampling is in peak detect mode which shows the worst min/max deviation). Is there a way to adjust the alternator voltage? I did not see the adjusting pot like some...

Ok, I understand that the cut wire could be for some diagnostic/ factory/ field test/ diagnostics, but how about the 4 wires connector coming from the top of the fuel filter? I saw in a YouTube video where they were replacing the fuel filter that same connector was plugged in a harness. I read...

Yes, I removed the engine harness in order to get to the fuel filter as it is very cramped behind the alternator. I am hoping to replace it tomorrow, it is not much space to get to the screws and the two fuel lines clamps screws heads are facing towards the back of the dashboard. Is there any...

The way it runs it feels like something is intermittently sticking or something is getting in the way and thought if I push the gas thru faster it may improve the situation since the it has been sitting for so many years, I am an electrical engineer, not mechanical and this is the first car I...