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It's in the valley of the engine, down near the back (behind the fuel filter canister, and just starting to disappear under the turbo.) It's a 2-stage mechanical pump driven off the camshaft, not an electric pump like on the Superduties.
You can check the pressure at the fuel pressure regulater. It has a schrader valve that you can use to check it. should be about 40-50 lbs stock at idle. Another thing that may cause the same sysptoms is a weak high pressure oil pump. Just a thought. If you go to change the fuel pump, PM me. I got a great write-up on exactly how to get it done that I can e-mail to ya. good luck.
do these go bad as i am having a supply problem at higher rpms? almost like it is starving for fuel?
I have no personal experience on the mechanical fuel pumps on the PSD, but I have read that the fuel pumps fail and with the exact symtom you describe. I also have heard there is screen in the filter bowl that gets blocked up with crud. You need to remove the filter and clean out the screen with as many Q-tips as necessary to get the job done.
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I just picked up a 96 f350 stroker. Has 120k and would just weez out over 1/2 throttle and would not want to rev up to 3000rpms. I took the fuel filter out and drained the bowl. It had a good 1/8" inch of crud in the bottom. I removed the fpr and all the wiring and hoses and pulled the housing out and cleaned it. The little screen kwikkordead was talking about was all but completely plugged. Its like a little plastic piece that a screen is glued to in between the Fuel press reg and the fuel bowl. Needless to say I found a couple burnt wires and bad plug ends so I get to make a trip to the stealership tomorrow and get parts before I can try it out.
I replaced my fuel pump last year after smelling fuel and seeing small leaks. While doing this, replace the fuel filter and as has been noted, clean out the fuel cannister, the fuel lines, and the mesh screen. Don't lose the o-rings!
However, be extra careful when removing the fuel pump. The pump has a piston on it for the pump that fits into the engine. While removing it be careful to watch it while removing it out of the valley or it might fall out and into the engine. I know from experience and have the remnants of it in the bottom of my oil pan. Replacing the hoses can be a chore too as there is not much space between the fuel pump and the bottom of the bowl.
Also, getting to the valley is fun, but while there, clean it out with brake cleaner or Simple Green. I am sure you might find some things dropped down there!
Have fun! You can do this job, but it will take some time.
Last edited by BigBill33; 02-21-2005 at 07:32 PM.
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Hey BiGBill33, Am I to understand your pump plunger is still in the bottom of your oil pan. I did the same thing, was changing out the pump and the plunger fell thru past the camshaft and I assume into the oil pan? I don't really want to pull the engine to get the pan off if ya know what I mean.
Thank's Bill Farrell
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