Hello: i cant get a big white, ugly pk-up out of my driveway and to the work site where i used to make money

it runs 1 day out of 30, (make that 1 / 60)
ran the other day for 20 miles, restarted hot
would not start the next day
it did that 2 weeks ago as well
otherwise it took the winter off

I have 2300 psi Injection Control pressure (can u still have show stooping HPO leaks ie Injectors, elsewhere?)
had a bad connection to ICP now fixed
have changed IPR
new CPS
3.29 - 3.15 Fuel Pulse Width
32% IPR Duty
45 - 60 psi fuel pressure after bowl
140 - 165 rpm
have WTS
have tach inside

changed PCM
examined connector, looks OK

tried a second (used) DCM
with fuel pulse width at 3.29 it is working ... no?
wires over Valve cover are OK



Correct oil level, changed oil, LPOS pumping / oil res full
Correct type of fuel
Correct fuel pressure (50+ PSI per Ford spec)
Sufficient air supply
Proper oil level in HPOP reservoir (1 to ¾ inch from top)
Glow plug relay works and glow plug operation is BAD but 80 here today and NO smoke

drained filter housing and cleaned
verified fuel is filling filter housing

had (newer) batteries tested and charged / cleaned posts

any ideas?

Thanks for your time

 

So you've tried a different idm? Have you checked that the engine harness hasn't rubbed through a wire where it lays on the driver side valve cover? Being able to check for codes would help a lot. Have you checked the valve cover harness and connector both outside and under the valve cover? Have you checked for oil squirting out of the injector vents while cranking?

 

Yes and no. the wiring across the DS valve cover appears fine, there is 1/2 " spacing above the VC.

I have not had the VC off. Which speaks to my short understanding on this restart. I would not know what i was looking at. If u have 2300 psi in the HPOS can u have show stopping leaks in the system? If one injector was leaking would not the others try to fire. Why would it work one day and not the next. Would a bad UVCH be on and off problem?

what / which is an injector spout anyway? Thanks

 

sometimes the connector on the inside can work its way loose and be intermittent for a while and then eventually loose connection. Check outside connector terminals and inside connector and make sure its secure. I wouldn't think you have a leak on the high press. oil side if showing that much press. The spouts look like little turn down tips that bolt to the injector with an allen head bolt. If you have oil coming out of it while cranking the injector is working. Can you hear the injectors clicking while cranking?

 

I got the Driver Side VC off, there should be a warning about the bolt against the firewall.

anyway, the wiring appears (to me) to be OK

the injectors are NOT firing

tried the old idm, no luck ... they could both be bad

thanks

 

Have you tried plugging the block heater in? My friends 99 7.3 would not start because of a bad glow-plug relay, there for when he would plug it in, it would start no problem.

 

well i'll be able to put 4 GPs in now.

but what on earth is keeping the injectors from firing?

what can i do to narrow this down? Thanks

 

IDM, wiring, fuses/relays, cam sensor. If you could get a hold of a code reader or scan tool it would help you alot

 

IDM :could be bad , i have tried two, can failure be intermitent or better can it be tested?
How can you test power to IDM and is that a relayed cycle ignited by PCM

WIRING, Looks OK but connection to IC Sensor was bad. I have a good 98 eng harness,
(this is a 99) ill see if it 'fits', I know it is modestly different with regard to turbo
sensors and altirnator / perhaps I can cut and paste a good harness together for
a test

FUSES and RELAYS keep testing OK
Fuses/ the PCM, switch and dash gauges, CPS are 'lit' / is there a fuse specific to IDM?
Relays, anything other than GP? anything in the fire cycle for injectors that is not
clustered with PCM / Dash Gauges / CPS that is powered now?

Is there anything key switch related (direct to IDM perhaps) in the fire cycle

CPS cam sensor. changed twice / reset 4 times

Thanks

 

Checked / reworked battery Wires and clean grounds to block / took BATS to store for check and full charge, one like new one only slightly off

No codes thrown / checked fro codes with two different PCMs

2300 psi HPOS / IPR at 32%

12.2 volts no crank ... with 10.5 / 10.6 when cranked

55 psi fuel after bowl

165 rpm under crank //// CPM is working (?)

3.5 pulse width /// doesn’t that indicate IDM working?

I have a 99 AA IDM ....... tried a friend’s 99 AB, nothing //// would not a BAD IDM throw a code?

Cover off / wiring appears OK / injectors not firing

New oil / oil in reservoir

Truck ran 20 miles 2 days ago and for 20 miles 2 weeks ago / otherwise no start over 3 months

thanks