BacaDiesel
SDD Junior Member
i've got a really weird problem with this truck im working on, its a 2000 f-450 auto trans 2wd federal pcm.
ok well, it drives just fine but does not produce more than 10psi wot. idles fine. but after i drive it hard for a couple minutes it acts like it wants to die at idle and no power at all, i can be flooring it and now i am only making like 1-2 psi, will barely go 10 mph. so im thinkin maybe boost leak. if i let the truck sit for like 20-30 min it will drive just fine again until i boost it hard.
the only code it is throwing is low boost pressure i cant remember but i think it p0247 or something.
i have taken off all the intercooler boots and cleaned them, they look good, no holes or rips anywhere. i installed the pipes and still same problem, i also cleaned the y-pipe boots. i have been spraying brake parts cleaner around the boots and manifold plenum and nothing, no change in rpm. i also checked map sensor hose and put new clamps on hose. i tried another map sensor and also tried driving it with map sensor disconnected and still that same. i check my fuel pump, i dont think its related but i dont know what else to do. the fuel pump with key on engine off was showing like more than 100psi so that cant be good, so i switched it with another fuel pump off another truck i have here, and this one puts out 65 psi. i installed fuel pump and took it for a test drive and still doing the same thing. so i switched the pcm off the other truck but that didnt work because the other truck is a manual trans.
i have also tried wiggling wires to the valve cover harness but i think that connector is fine, there is no other codes except for low boost. new fuel filter was installed last week. is 10psi stock psi for a f450? on my f350 i get like 19psi.
oh and i checked the exhaust crossover pipes and there is no soot on there, but i noticed that there are two bolts broken off on the turbo exhaust side right next to the two bolts for the pedestal. and there is a little bit of soot there, could that be my boost leak and the no power at all/idle problem? not not sure if there is boost there in the middle section of the turbo, maybe just the shaft that spins there? im going to try to take a pic of the turbo bolts that are broken.
if anybody has any idea what this could be please help me, i have been trying to diagnose this for over 14 hrs now
ok well, it drives just fine but does not produce more than 10psi wot. idles fine. but after i drive it hard for a couple minutes it acts like it wants to die at idle and no power at all, i can be flooring it and now i am only making like 1-2 psi, will barely go 10 mph. so im thinkin maybe boost leak. if i let the truck sit for like 20-30 min it will drive just fine again until i boost it hard.
the only code it is throwing is low boost pressure i cant remember but i think it p0247 or something.
i have taken off all the intercooler boots and cleaned them, they look good, no holes or rips anywhere. i installed the pipes and still same problem, i also cleaned the y-pipe boots. i have been spraying brake parts cleaner around the boots and manifold plenum and nothing, no change in rpm. i also checked map sensor hose and put new clamps on hose. i tried another map sensor and also tried driving it with map sensor disconnected and still that same. i check my fuel pump, i dont think its related but i dont know what else to do. the fuel pump with key on engine off was showing like more than 100psi so that cant be good, so i switched it with another fuel pump off another truck i have here, and this one puts out 65 psi. i installed fuel pump and took it for a test drive and still doing the same thing. so i switched the pcm off the other truck but that didnt work because the other truck is a manual trans.
i have also tried wiggling wires to the valve cover harness but i think that connector is fine, there is no other codes except for low boost. new fuel filter was installed last week. is 10psi stock psi for a f450? on my f350 i get like 19psi.
oh and i checked the exhaust crossover pipes and there is no soot on there, but i noticed that there are two bolts broken off on the turbo exhaust side right next to the two bolts for the pedestal. and there is a little bit of soot there, could that be my boost leak and the no power at all/idle problem? not not sure if there is boost there in the middle section of the turbo, maybe just the shaft that spins there? im going to try to take a pic of the turbo bolts that are broken.
if anybody has any idea what this could be please help me, i have been trying to diagnose this for over 14 hrs now
