1994.5 -stock truck no modifications
--Originally parked due to worn synchros in transmission--
Current situation- Engine will crank over but will not start-no smoke-Wait to start light is working
Vehicle sat for several years.(6+) Rats chewed on upper wiring harness damaging (high power harness top of engine) Inspection of rest of harness showed no damage
Hooked snap on red brick got code of p1283 also did buzz test and passed .
Removed harness from truck repaired and soldiered all connections-checked continuity and ohmed out harness and IPR
and all appeared to pass. Also took ipr
apart and put new seals in then reinstalled harness & IPR
on truck. IPR-connector did look bad (rubber was gummy from oil saturation)at that time but did not replace pig tail at that time. I attempted to do all test on fords p1283 code sheet but did not have break out box and was some what skeptical of results due to meter and needing three hands for wiring work (results point at bad ecm)
Truck would not start still at this point.
Due to age and time truck sat (also so i could clean valley) replaced fuel pump and all rubber lines and hose clamps. Removed all fuel in tanks using suction at main line in engine bay. Re-o-ringed fuel bowl and replaced filter added 5 gallons fresh fuel to tank as well as top off filter. Double check to ensure selector switch was on correct tank. installed new glow plug relay as well replaced cam sensor as well. Truck Still Crank no start condition.
Before replacing IPR
applied 12 volt straight to IPR
Still crank No start. Replaced IPR
pigtail on harness (connections soldiered).
Truck Still in crank no start condition. Have tried starting with ICP
connected and disconnected no change.
Also noted seemed HPOP
reservoir was low filled it with oil. Still crank no start. At this time due to low oil in reservoir removed oil sending unit on top of HPOP
installed mechanical gauge no pressure on crank attempt.
Even after cranking oil was still in HPOP
reservoir level seemed unchanged. (assumption LPOP
failure & Possible HPOP
malfuction or due to not firing leaving reservoir still full.
Next thing to check-inspect for possible cracked tube on LPOP
pickup-(over fill crank case with oil jack up rear) repeat crank test
Also planing on testing pressure on HPOP
(just ordered parts for pressure tester)
Also just purchased 104 break out box -rerun p1283 code test and confirm bad ecm
Red Brick stats
IPR-KOEO-not cranking resting reading 15%
ICP-resting KOEO- .18
Key On Cranking- 55%
Cranking RPM 160
So is their any thing I may have forgotten....? any added suggestion?