Pump adjustments

[Archive]

Does anyone out there know how to find the external factory settings for the injection pump? I tweaked the fuel delivery and the smoke adjustment a little and can't remember where the original settings were. All the instructions say to move the adjustments one way or another from stock and I have no way of finding this location anymore. Is there a certain number of turns from left or right? Ugh! I can't believe I didn't mark the OEM settings before I began tweaking!

 

[Archive]

It always sucks when ya do that! I did it too. The way that I found about where the original power screw setting was simply by the idle. You probably had to set your idle back when you turned it up right? This can be even easier if there is still markings on the threads of the idle screw. Just turn the idle screw back to where it was, then use the power screw to adjust your idle. For your diaphram adjustment, just puyll the shaft out and look to see where the pin rubbed the biggest mark in on the cone shaped part of the shaft, then work your throttle linkage while looking down in the hole to see where the pin is and simply line the two up!
Uh... . yeah, thats it..... I think
hope this helps. reply back if you get it or need anymore "ideas"

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Mine: '93 250 LE 4x4 5spd 4:10 Pwr win/loc/mir,cruise,strait piped,diamond plate tool box, CB, 16x10" AR rims, 285/75/16 Bf goodrich, US Gear E-Brake,Fuller Roadranger shifter, PW injectors, K&N. "wirenut_21529" on Yahoo Messenger
Moms:'96 Ford B-Series school bus (5. 9 Cummins!)I'm gonna Bomb it!
Dads:'94 GMC 2500 6. 5L Turbo

 

[Archive]

All of these are adjusted on the test machine, and have no "fixed" home. In other words, the pumps are set by what they do, not the position of anything. (Well, Cat sometimes sets thiers that way, but it takes a pile of special tools. )

That diaphragm could be almost anywhere when set to spec (although it's usually in generally the same area) and the screw on top can vary considerably.

Just don't screw with it unless you REALLY know what you are doing.