Low pressure high duty cycle.
Hellomand thanks in advance for any help! I have a 2003 7.3 excursion 4x4 with 74300 miles. At about 68-70K it developed a oil and fuel leak. I resealed the HPOP and fuel bowl. About a week later the CEL came on with a P1211,1212code. It ran fine and everything appeared to be w/i perimeters so after some research i figured id just reflash the computer( superchip came with the truck and in tow safe mode) couldnt find the cord but it drove fine so I didn't do it until recently and had no change. A few months ago after towing the boat it would barely,make it up the hill. Duty cycle pretty much hit 64.7 % and stayed there pressure never rose above 1800. It is totally gutless under load or up hill and dies under braking while going down hill. So,far ive- Resealed the fuel bowl,HPOP. New injector orings,new ipr,icp,cps.im getting low pressure- less than 1800 psi according to the icp sensor( new and old) , and a very high duty cycle from the ipr 64.7%, after replacing the ipr the pressure would not build above 1800 whereas the old unit was giving me at least 2600-2800. I cannot tow the boat, it has very long 10-20+second 'crank times it has died about a dozen times but only while going downhill under a braking application. Sometime it starts fine other times it is a very very long crank, it is not a consistant issue but its usually when warm. Oil has less than 1000 miles on it 15-40 delo with new fuel and oil filter. No visible oil leaks. I finally had to take it to a mechanic and they said that fuel pressure was 68-75 with spikes to 120. FRP in fuel bowl does not appear to be side loaded or have aftermarket springs/ shim. How do I get my truck back to functional shape