back on the FIPL voltage thing - as long as your idle voltage is where it should be, the WOT is usually left to fall where it may, as it's more dependent on the injection pump throttle arm swing than anything else. In other words some pumps have throttle arms that can turn more degrees than others, it's adjusted though a screw and a lock nut on the rear side of the throttle arm (the idle screw is on the front side), but it is my understanding that this gets set and the pump shop and is not something that should be messed with by the driver (with one exception, keep reading). So really what you do is set your idle voltage and check the WOT voltage, and if it is out of specs (3.5V-4.3V) you readjust the idle voltage again. Say you want 1.0Vat idle, then when you check the WOT you're at 3.45V - in this case you probably want to increase the idle voltage up to 1.1V which will raise your WOT to 3.55V and this is in specs on both ends so you leave it be. On the other hand, if at 1.0V idle your WOT already reads at 4.5V or so, you do NOT turn the idle voltage down, instead you can readjust the throttle arm stopper screw (the one you're not supposed to mess with) by turning it in to reduce the swing of the throttle arm - this is safe to do, as it's pretty much equal to you not flooring the pedal all the way - what you shouldn't do with that screw is turn it out to increase throttle arm swing.

Another thing worth mentioning is that since your FIPL voltage range is dependent on pump's throttle arm swing, it can be greatly affected by where your idle speed is. Factory setting is at 650 rpm for warm idle, and this is where you adjust your idle voltages as well. If you like running higher idle speeds, say 800 rpms at warm idle, drop your idle back to factory setting, adjust your FIPL voltage, then ramp the idle speed up again - if you take measurements again you will now notice that your "idle" FIPL voltage is higher than 1.1V, but in this situation this is okay, as your voltage readings still match the engine speed properly. On the other hand, I personally like low idle, and my 7.3 idles at 550 rpms when all warmed up - I adjusted my FIPL to 1.0V at this speed, so if I turn the idle speed up to factory specs IIRC she ends up at 1.2V which would be out of the recommended range, however even so my WOT voltage is at 4.25V which is still within range so this is how she stays.

In short, you don't want to go low on the idle voltage and high on the WOT, a little high on the idle and a bit low at WOT is okay. You adjust your idle voltages at factory engine speed or below, if you idle high first turn her down and then adjust. If your WOT voltage is too high with the idle voltage where it should be at 650 rpms or lower, reduce the throttle arm swing with the WOT stopper screw, never increase throttle arm swing even if your WOT voltages read low.

 

Alright thanks rupe i am gonna go make sure it is in spec