His original post...
My 1999 F-250 7.3L diesel is hard to start after sitting 4 or 5 hours. I have pulled the codes and I get P1211, P1212, P1247. I have reset back to factory settings and all 3 modes of my tuner with no change. Once I get it started it revs high then bogs down and stalls I restart. This may happen 3 to 5 times. Once the engine gets to full operating temperature she runs normal no further issue until she is shutdown for a few hours. I am leaning towards the EBPV but not sure. The toss up is EBPV and MAP Sensor. I have run the tests for the 1211 and 1212 codes all is well. I have checked all fluid levels as well. Stopped by the Ford Dealer in Clarksville and was told they are backed up for the next 10-14 days. Any thoughts would be appreciated.
We data logged it this afternoon as it seems to be gettin worse. It's luggin while goin down the road now. He detuned, and I cleared all his codes before we started. His DC's and ICP at idle looked fine to me. DC maybe a touch high for no tune. But about normal. His MAP looked normal. I couldn't get any reading out his throttle sensor though. But, if it was bad, it wouldn't even move. It'd put the truck in limp right? I'm still learning, and not sure exactly what I'm supposed to see out EBV, but it didn't kick any codes while I was in it.
His ICP sensor is the cleanest I've ever seen. Looked brand new. The whole motor is as clean as I've ever seen. Not even a trace of anything leaking in the valley. His fuel bowl is full. Nothing that I can visually see wrong with anything.
I'll attach the data log. He goes WOT from line 6 to line 21. He backed out and the pressure spiked in 22. Notice it drops to 338 at one point! And goes up and down. It continued to act up through 26 where it spiked again, then drove normal for the rest of the log. We didn't go WOT again though. Notice though, that his DC's climb normally. Now, with my old HPOP and no tuning, the DC's never got over 38%, but I was easily at 3000 ICP.
It kicked another 1211 code when we went WOT, but nothing on EBV.
So, this data log looks almost like really bad tuning to me.
Could it be a bad ICP even though it's clean? I've seen 'em full of oil and the truck still runs fine. IPR maybe? Or is it time for a new HPOP? With nothing leaking, and as clean as the motor looks, I don't know what to think about the data I see.
Techs, if there's something else I need to look at, lemme know. Please include any parameters it should be within too.