Man, it’s been dead in here lately. Let me throw a goofy one at some of you guys, hopefully someone has a thought.
01 f450 pretty much stock
Truck had come to me a few months back, put up pipes, pedestal, and a hydra on it. Php didn’t have the pcm code for their box tunes, so I found a description that was similar to what the truck is, and loaded those up. Ran fine for about a month and a half, then his hpop started pissing, so I put a cnc fab stage 1, and the 2 cnc fab lines, did not do a crossover line. About 2 weeks later he calls me saying it lacks power, and was damn near undriveable. I asked the usual questions, as far as filters go, he cleaned the air filter, and changed both his fuel filters (he’s got a pre filter on it) even though the fuel filters weren’t too old time/mileage wise. I stopped by his house, truck ran pretty good cold, about as good as a 450 boom truck on a 75ish ho tune can run. Then, as it got warm it lost all power, and didn’t have the slight amount of smoke that it had cold. He informed me the injectors came out of his old pickup, and probably had about 225-250 on them, so I sold him some stock replacement full force injectors (to include the long lead injector, as this guy thinks it’s too noisy), motorcraft valve cover gaskets, under valve harnesses, and glow plugs. Changed the oil and filter with a motorcraft filter, and Costco Kirkland 15-40, which I didn’t even know was made. Did not fix the problem. Only code it’s throwing is a 1211 icp higher/lower than desired.
I have checked icp, it is reading correctly koeo, seems to follow desired, but far enough off to not be defaulted, I found its idling at 2.5ish ms on pulse width, at 500ish psi, and 7-11% ipr. Once it gets to around 180 on oil temp, this thing has a solid 3 count once you hit the throttle, then it slowly comes up in rpm. App is reading properly when I press the throttle when this occurs. After having it lack power, the ipr duty cycle will hang around 45-60% still at 2.5ms, and 500ish psi. If I free rev it to about 2500 rpm it acts like it’s got a hard rev limiter, and will bounce from 3ish ms to 600micro seconds for about 10 seconds, it is around 2500psi at this point, then it will smooth out, drop to 1.5ish ms and 1500ish psi. Then when I return it to idle its idling at 2.5ms, 7-11% ipr, and 500ish psi.
Changed the ipr, mainly for s&gs but also figured it may have been sticking when hot, no change.
Base oil pressure is 20 at hot idle, 40 at hot stall on the converter while testing the concern, seemed low to me, but a guy I know who does 7.3s all the time says that’s normal. He is also stumped on this.
Only thing I have found that is absolutely wrong, is fuel pressure, it’s about 35 at hot idle, and drops to 24 while power braking. I know this is bad, but the numbers don’t change from when it doesn’t have any issues vs when it does have the issue. It is also not a suction issue, I ran the suction side of the pump to a 5gal jug tonite with no change.
Planning on trying a cam sensor for s&gs tomorrow, and if that doesn’t fix it borrowed a idm from my buddy to test. Not really leaning towards either fixing it, but it’s a 7.3, if it’s not under valves, icp, or ipr, it’s a cam sensor, right?
I know this is a lot, but I figured all the info I’ve got makes it easier for some else to help diag.
Thanks for any help
Sent from my iPhone using Tapatalk
01 f450 pretty much stock
Truck had come to me a few months back, put up pipes, pedestal, and a hydra on it. Php didn’t have the pcm code for their box tunes, so I found a description that was similar to what the truck is, and loaded those up. Ran fine for about a month and a half, then his hpop started pissing, so I put a cnc fab stage 1, and the 2 cnc fab lines, did not do a crossover line. About 2 weeks later he calls me saying it lacks power, and was damn near undriveable. I asked the usual questions, as far as filters go, he cleaned the air filter, and changed both his fuel filters (he’s got a pre filter on it) even though the fuel filters weren’t too old time/mileage wise. I stopped by his house, truck ran pretty good cold, about as good as a 450 boom truck on a 75ish ho tune can run. Then, as it got warm it lost all power, and didn’t have the slight amount of smoke that it had cold. He informed me the injectors came out of his old pickup, and probably had about 225-250 on them, so I sold him some stock replacement full force injectors (to include the long lead injector, as this guy thinks it’s too noisy), motorcraft valve cover gaskets, under valve harnesses, and glow plugs. Changed the oil and filter with a motorcraft filter, and Costco Kirkland 15-40, which I didn’t even know was made. Did not fix the problem. Only code it’s throwing is a 1211 icp higher/lower than desired.
I have checked icp, it is reading correctly koeo, seems to follow desired, but far enough off to not be defaulted, I found its idling at 2.5ish ms on pulse width, at 500ish psi, and 7-11% ipr. Once it gets to around 180 on oil temp, this thing has a solid 3 count once you hit the throttle, then it slowly comes up in rpm. App is reading properly when I press the throttle when this occurs. After having it lack power, the ipr duty cycle will hang around 45-60% still at 2.5ms, and 500ish psi. If I free rev it to about 2500 rpm it acts like it’s got a hard rev limiter, and will bounce from 3ish ms to 600micro seconds for about 10 seconds, it is around 2500psi at this point, then it will smooth out, drop to 1.5ish ms and 1500ish psi. Then when I return it to idle its idling at 2.5ms, 7-11% ipr, and 500ish psi.
Changed the ipr, mainly for s&gs but also figured it may have been sticking when hot, no change.
Base oil pressure is 20 at hot idle, 40 at hot stall on the converter while testing the concern, seemed low to me, but a guy I know who does 7.3s all the time says that’s normal. He is also stumped on this.
Only thing I have found that is absolutely wrong, is fuel pressure, it’s about 35 at hot idle, and drops to 24 while power braking. I know this is bad, but the numbers don’t change from when it doesn’t have any issues vs when it does have the issue. It is also not a suction issue, I ran the suction side of the pump to a 5gal jug tonite with no change.
Planning on trying a cam sensor for s&gs tomorrow, and if that doesn’t fix it borrowed a idm from my buddy to test. Not really leaning towards either fixing it, but it’s a 7.3, if it’s not under valves, icp, or ipr, it’s a cam sensor, right?
I know this is a lot, but I figured all the info I’ve got makes it easier for some else to help diag.
Thanks for any help
Sent from my iPhone using Tapatalk
