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ChadS
12-02-2004 11:22:16
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Good afternoon. Fellas, I have a question, or quite a few to be honest. Need some direction. I got a 93 Ford F-350XL, It is a cab and chassis model, plain jane, it has the very short wheel base, flatbed, dually ,and oh yes, a 7.3 (non turbo) Diesil, with a 5 speed. (Just too bad fuel prices are the way they are) I use it to pull my tractors around, its not a every day driver, but it get used. Been fixin her up alot. Sure is nice to have a smooth riding truck on these rough Indiana backroads. It has had a few problems since I bought it. And one is still lingering.. Bout 2 months ago,, I had to replace the injector pump. I got a good used one, off of a runner, that had been wrecked. The donor truck, had always ran perfect, just too much $$ to fix it. So, I swapped the pumps out. Upon inspection of the donor pump, I had noticed that the advance mechanism linkage on the side of the pump was sticking, so I took it off the old pump. A freind of mine, told me, while I had that apart, to go ahead and look at the advance unit its self to see if was scored up. Did not look too bad,, but the actuator plunger,, was sticking and would stick, it is a small little fitting, on the outside of the pump, but,, has an adjustment to set the proper advance when the throttle is floored, or what have ya,, I used the one from the old pump. I did not change the adjustment from one pump, to the other,,, So, everything was working, parts were freed up,, and cleaned, ready to put it on the truck. Put it on,, lined up the notches on the pump, and the engine, (iwould think tdc for #1?) anyways, put it on, bled the lines, and fired it up. run decent,, wasnt as strong, but has developed 2 problems since I swapped it. First off, on cold starts,, I cycle the glow plugs, lite goes out, and start it. it will take right off, but it runs funny. like it loads up, or, maybe the filter lost prime,, I have to hold it to the floor, kinda open it and close it, while tunring it over,, then stop, recylce the glow plugs,, and it fires up and stays running,, erratic,, but running,, I have to kinda hold the rpms up a bit for it to smooth out, and stop blubbering, at least, that is how I would decribe it. Smooths out, ready to rock and roll. It never starts hard, after it has warmed up, fires right up,, its like when u park it overnite,, it is when it does it. when it goes down the road, runs good, but at about little over half throttle,, she smokes black, i mean cant see the car behind you black. and I can let off the throttle, back the rpms down a hair, and no smoke,,, just when it gets to the point. plenty of power up till that point in the throttle. thats it as far as how the engine runs for charateristics,, so, now on to the second problem it developed when i changed the pump. it gets diesil in the engine oil. thins it out,, gotta change it bout every 3-500 miles if u drove all the time id say. Now i know about the seal in the front of the pump,, but it never did that on the wrecked truck,,, so I dont think the front shaft seal is out,, Im wondering if I have the advance out of whack,,, I think, that since it is fluttering at cold starts, its not getting into start mode on the pump,, (like activating the idle circuit fromthe advacne too far) I think the oil problem,, is from the advance being too early, and flooding the cyl, and washing down the rings. from too much fuel at the wrong rpm. Now, the engines condition is good,, I caught it before I really drove it around and blew the crank out of it. I checked the oil after an oil change, 100+ miles after I changed the pump, and the oil that day,, and it was overfull about a quart. Real thin too,,, SHOOT!! parked it. I drove it on a road trip last week, but I took a drain pan, and lots of oil with me, yeah, that was fun,,, but a country boy had to make that run, and that was the only thing I had. oil never got the chance to thin out, and ruin it. So, now Im ready to take a look at it,, and I have been thinking bout it for about a month now,, this, what I described, is what Ive been rattlin in my brain,,, as to what I thought about trying. U guys think it is out of adjustment onthe advance mechanism? ( a side note on the donor pump) had been replaced in 2002, and had bout 35,000 on it. and what i told ya is what ive done. I think ya all may have been in my shoes before,, Im just a young fella, still learning, and I love to turn a wrench or 5! LOL. Its just a good ol truck, but Im too proud to send it up to the shop. I think I can fix that!!??? any info would be great on the settings, or anything! Park the chevy,, drive the FORD! Thanks! ChadS
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