I'd like to start off by saying that there is a wealth of knowledge on these forums and thanks to those who are more knowledgable than I for getting me this far.
I have an early 99 F-250 with 202K on it.
I've had a problem with my truck since early December. The symptoms were harder than usual starting and loss of power (feels like about 80% of normal). I ended up taking the truck to a diesel repair shop where they ran a cylinder contribution test and found that #8 was weak. They recommended a full injector replacement given the mileage, but wanted about 4K to do so. They didn't want to use reman injectors either.
Looking for an acceptable alternative I asked a friend that has a few 7.3s his opinion and he recommended that we replace the injectors with remans from BDP. We sent the injectors off, they were tested and found to be in pretty rough shape. They rebuilt them and sent them back.
My friend installed the injectors but the truck ran even worse than before and would only start on ether (I've never had to use ether before even in 15 deg cold). It was so weak that you could barely move it around in the parking lot.
I borrowed AE from a friend and found that bank 2 was not talking to the engine. With help from your forums and alldatapro I tested the voltage input from the IDM to each bank of injectors.
I pulled the valve covers and found the UVC unplugged and two of the injectors disconnected. I hooked everything back up and started the engine to notice that engine would now rev like it used to, or pretty close anyway.
I put it all back together but it is still running rough like it was before any of the injector replacement, but now it has to be started on ether. I tried unplugging the IPC sensor and it still wouldn't start. btw, codes were cleared at several points whenever I changed anything.
Using AE I found the following:
Cold idle ICP is 724 PSI with a duty cycle of 14.45.
Cranking ICP ~150 PSI (very low), ICP volts ~.42, RPM was 130, duty cycle increased from 14.84 to 64.48 as I floored the accelerator.
Floored Accel ICP was over 2000 PSI at first then tapered, Duty cycle was 30.86, ICP volts 2.77, RPM 3186 (reved up to a peak of 3484.1).
I realize that a cranking psi of 150 is way to low to start so I should focus on that. Removing the IPC sensor doesn't help. Would the next step be to remove the IPR and clean it, then replace if no change? Are my running injection pressure values OK?
I hate to throw more parts at this thing since replacing the injectors didn't fix my problem.
BTW, I filled the truck up with truck stop diesel and added some Diesel Klean.
Any help is much appreciated as money is tight and I need my truck!