have you buzz tested the injectors? or atleast check the armature clearance?

 

Not sure if this silly Auto-Zone reader can do a Buz test. Ill try it out.

I was really expecting to see at least some codes. I think ill disconnect something to see if I get a code. that just seams so odd

The truck ran the other day. It ran well. For all 8 inj to go so far out of spec that none fire over-night seems out of bounds, Am I wrong on that? Something is intermittently stopping the signal to the injectors.

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With regard to the IDM , do they have to be a exact match AA or AB ?
The back-up I have been trying is an AB whereas the truck original is a AA?
Has anyone experience a 'ghost' intermittent IDM failure. Work for a couple hours ... not work for a month .....work for a day then quit for a few weeks?

I am looking for a trial available AA right now / see if I can make that happen

Thanks Again

 

any 7.3 IDM will work. and a autozone scanner will always show a pass 1111 code since it does not have enhanced capabilities of ford diesels. and yes the injectors can get bad that fast especially with rotella oil. if it were a glow plug issue it would atleast smoke out of the tailpipe when cranking. try plugging in the block heater and see if it starts, warming the injectors with the block heater may make them grow enough to start

 

Perhaps BOTH IDMs that I have have failed, the one intermittently, but I am getting a Injector Pulse Width of 3 Mil-sec which I thought was an output function of the IDM

Can you walk me through the the non-code issue .... have you experienced a No Code result before ie no pass 1111 code result .... I mean what the hey ... no codes found?? (?)

Thanks

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Sorry I was going to add that with regard to GPs, the Injectors are NOT firing , you cna see that they are not, As far as I know there is no feed back loop with regard to GP function. If all GP failed it would still fire the injectors -- perhaps not start ---but fire and smoke. Is that not true. ?

Same with injector clearance, as far as I know, again no feed back to stop injectors from firing because of clearance issue. Am I wrong. ?

Thanks

 

the pcm sends mass fuel desired to the idm and it does the rest. generally a failed idm has a code such as p1298 and injector codes such as p1316. you just need a better scan tool for the diag such as auto enginuity

 

Waiting for a tech with a better reader ... perhaps tomorrow. Ordering a different (3rd) IDM just to experiment

Found new clean oil in the valley can not replicate a leak under crank. No visable leak. Casper has not run, has not fired, with the 'new oil' in place .... perhaps it was spilled during refill but perhaps a clue. Again I am reading 2300 psi but injectors do not fire.

If you get 2300 psi HPOS via ICP to PCM I would think that closes that loop. But can air in the HPOS or any other HPOS leak type circumstance interrupt signal to PCM, or trigger any other deal killer circumstance with read to non-fire??


On the block, drivers side, not far from ICP but on the otherside of the forward lifting eye, is a heavy wire , looks like a ground wire, is anyone familiar with what that is and where it goes?


thanks for you time

 

bad cps or wiring could do this, or injectors,ect. along with dozens of other problems could cause it!

 

Since it is Preakness Day: I have two ready-to-cook Baltimore Crab Cakes (+FEDX) for anybody that can get 'Casper' Going. Right now it is Stop-and-Start with a high degree of Stop

It is not the CPS and I have tired 'dozens of things'
WTS works / dash tach works
Replaced the OEM CPS twice, redid wiring and re-positioned 2 more times

Checked all fuses and relays/ re-positioned all

Checked / reworked battery Wires and clean grounds to block / took BATS to store for check and full charge ,12.2 volts no crank ... with 10.5 / 10.6 when cranked, 160 rpm @ crank

No codes thrown / checked for codes with two different PCMs

Checked all known connections

New oil / oil in reservoir/ oil pressure under crank/ 2300 psi HPOS reading from ICP / IPR at 32% / new IPR / ICP wire and connection replaced

55 psi fuel after bowl

3.17 - 3.5 pulse width

replaced IDM twice Mine was AA but ford said AC should work ... (don't know (?)

Cover off / wiring appears OK /over valve cover / replace any remotely suspect wires in engine harness / injectors not firing

Local independent says it is a HPOS leak and it will start cold. The truth is it will start when it wants to / and has nothing to do with cold.

Truck ran and started 20 miles 2 weeks ago (hot and cold) and for 20 miles 3 weeks ago / otherwise no start over 4 months

(there is one heavy undone wire I don't know what it is. Close to the ICP but on the other side of engine lift mount)

Is there any other function key switch related that can kill the motor. I have power to PCM, GP, CPS, and starter

https://www.dieselbombers.com/images/smilies/dash2.gif

thanks

 

where are you located? i'm not a seafood person but I might be able to help if you are ready to dig in deep
click diagnostic guides button, then print diesel engine diag. guide for your appropriate year. fill it out with precise info and we can go from there.
POWER-STRUCK, osgood indiana, performance tuning

 

hey I was reading your post and was wondering if a super chips tuner would read the codes you need to read I have one that came with my truck when I bought it and I basically never used it as I went w a dp chip. id be willing to send it to you if you wanted to borrow it if you have a ups acct number..