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Discussion Starter #21
Hey bugman l got some help today and while under the hood l notice when he turned the switch on l did,nt hear the fuel pump, so l took the top off the bowl and turned switch on it was hardly nothing so l mashedthe stem in for the fuel the one that looks like a air stem and turned switch and hardly nothing came out.do you think it could be my fuel pump.
 

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You have a mechanical fuel pump located behind the filter housing almost under the turbo. They didn't go electric until 1999

You need to test the fuel pressure while cranking the engine over. As I mentioned you can use a pencil type air pressure gauge and should be seeing 30ps+ i I believe. Anything below I would suspect a bad fuel pump.

Just wrap the air gauge in a rag or you just might get sprayed with diesel.

I'm going to be gone over the weekend and for a few days next week, hopefully someone else will jump in here if you need more help.
 

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Discussion Starter #23
thank you for all your help, l do believe l am heading in right direction. a young man is coming down monday with a shop scanner, he runs a auto shop hopefully he can tell me something. again thank you.
 

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I don't know what the pressure minimum is, but that sounds marginally-low to me.

1. Make certain you are drawing fuel from a tank that is at least half full. If/when the in-tank pickup tube breaks off or cracks, you will run out of fuel at about a quarter-tank. If your tube is cracked, you may be sucking air. Also switch tanks as you may have a tank selector issue.

2. Make certain you have a clean fuel filter. Drain the fuel bowl before you remove the old filter, and never fill the bowl manually. If you get trash on the clean side of the fuel system, you can clog an injector and there will be Hell to pay!

3. Remove the fuel pressure regulator. Inside, there's a wire screen about the size of a nickel. Make sure it is not clogged. If it is clogged, examine the trash closely, as any fuel that passes thru this screen has already been filtered. You may have a rubber fuel line that is breaking down inside and passing trash to the screen.

Also, if there is trash inside the regulator, it could be holding the little plastic ball open slightly. That can drop your pressure by allowing fuel to bipass back into the return line. Diesel o-rings . com has a rebuild kit for the fpr, and they post instructions on their website.

4. Your truck is an antique. You may have a clogged selector valve, clogged fuel lines, and/or clogged pickup tubes.
 

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Discussion Starter #27
Got back to working on my 95f350. I removed fuel bowl cleaned it all new O- rings screens new ipr and icp still no start
 

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Are you 100% certain you got all the air purged from the high pressure oil system?

Are your batteries strong and topped-off?

Does your tach move slightly when cranking?

I would unplug the ICP and try to start again. It's a remote chance, but perhaps your new ICP is defective.

I would measure voltage at fuse 22 under the hood, and at the IPR harness - both with key on. Sorry, I don't know what the voltage at the IPR should read, but 22 should be battery voltage.

One of the two wires to the IPR will be a ground (obviously) - try to determine which. If you'll take that ground wire directly to the battery ground, you'll be applying maximum IPR pressure to the injectors. I would try to start it, and I would give it a small shot of ether.
 

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I would also install a new cam position sensor, even if you do have tach movement at cranking. The CPS is inexpensive and easy to replace - plus you should always carry a spare with you.
 

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On the IPR, the Red wire is battery voltage and the Yellow/Red stripe wire is the ground (provided by the PCM when commanded). Cheers!
 

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Discussion Starter #34
Been awhile since I have been on here. On my 95 f350 that wouldn't start wound up changing out fuel pump and HPOP also the ipr valve. She's running like a champ. Thanks to everyone who helped me on this problem. This forum is the best. Thanks again.
 

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Discussion Starter #35
1995 F350 injector has a knocking sound

When l start my truck it has a knocking sound. Not bad but it's on passinger side and while driving you can,t hardly hear it. How do l locate which injector is bad. Thanks
 

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To do it right you need a break out box that will shut down each injector individually.

But without one you can pull the valve cover and disconnect each injectors wiring and find it that way.
 

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The FORScan app can do a cylinder contribution test with the engine running at operating temperature, and tell you which of the cylinders is bad.
 
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