Is the icp sensor on the left side down under the air box, steering shaft area? And how much air preesure did you apply to the icp rail? Also what size or thread is the fitting? I might try it myself if I can't talk the dealer into doing it. Mine hasn't done the no start warm thing since the temps have been in the 50's.
nope its on passenger valve cover. right beside glow plug controller
100 psi. could hear leak immediately, just hard to pinpoint.
i bought a new icp sensor, so i sacrificed the old one. i cut it off leaving just enough of the hex to tighten with a wrench, then gutted it and drilled a hole so air could flow thru and clamped a small hose on. there will be an air leak from the a hole in the back of the hpop. supplying battery power and ground to the ipr (Injection Pressure Regulator) (for no more than 20 seconds at a time ) on top of hpop should change the sound, as it will block most of the air from leaking out the hole. if it does not change, suspect the ipr.
could also be the top o rings on the injectors where the hp oil rail fits in. remove the valve covers and rails to check all the o rings. both hp oil rails have standoff tubes going thru the rails, thru the heads into the hp oil lines in the block. remove the standoff tubes and check all those o rings. the standoffs are under the large shiny allen head plugs, at the rear of the hp rails. the standoffs are 2 pcs, so pull them apart and check all the o rings.
after i checked all the o rings, i put the standoffs back in , plugged off one with hose and clamps and pressured up the other one. could hear air coming from deep inside block. removed turbo , ipr (need a special socket- 1&3/8 deep thin wall with one flat cut out for electrical connector or a crows foot)and hpop cover. inspect ipr o rings, replace ipr, power it up and check the hp fitting for leaks at the swivel/ o ring area. this is where mine was. most people that change the pump fix the problem, only because the new pump will come with the new fitting which was the problem in the first place!!
ambient temp should not be a factor if it is a leak. only oil temp and viscosity. cold oil is thicker, so it does not leak as readily, which is why it starts better cold. if the problem has stopped, i would suspect icp sensor, ipr or possibly wiring.
there is a ford tsb on the hpop hp fitting, which your dealer should have.
this is a big job, not to be undertaken unless you have the tools and lots of time on your hands.
