Kris Harrison's 1997 Diesel Issues

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Kris Harrison's 1997 Diesel Issues

Gary Lewis
Administrator
Brandon/Bruno2 sent me a text message yesterday asking questions about the PCM on the 1997 F250 that his son, Kris/Bruno2son, has. Apparently it shuts off at the least opportune times, and may not be willing to start for an hour, or a day, or a week.

So I agreed to find the '96 EVTM and scan in the pages for the diesel that are in it. As it turns out there's only one diesel listed in it - a 7.3L DI w/a turbo. So I scanned those pages in. But, since I don't know where to put them in the Documentation part of the site I'll put them here. Hope they help.

Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker in front & 10.25 Spicer/Trutrac in back, & EEC-V MAF/SEFI

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Re: Kris Harrison's 1997 Diesel Issues

85lebaront2
Administrator
Gary, John Gleason (friend I did the 10.25" disc brake conversion for) has a 1995, same engine. He has had a couple of issues with his, one that blew his mind was oil low, apparently the oil level can get low enough that the HPOP (High Pressure Oil Pump) gets air into it and the hydraulically operated injectors don't open fully if at all.

Another common issue on these is the crank position sensor with no signal, the PCM has no reference so it won't trigger the injectors. A further item, the wiring for the injector solenoids and glow plugs runs through the valve cover gaskets and they are known to burn the connectors due to the high current for the glow plugs.

I would start by taking a good look at the connectors on the outside of the valve cover gaskets and make sure they aren't melted or burned.

These engines are a "drive by wire" system, no throttle cable of any kind, accelerator pedal operates a resistance box that tells the PCM how far the pedal is depressed.

If you look at the wiring you will also see the IDM (Injector driver module) it is an aluminum box underhood just behind the PDC on the left inner fender.
Bill
"Getting old is inevitable, growing up is optional"
Darth Vader 1986 F-350 460 converted to MAF/SEFI, E4OD 12X3 1/2 rear brakes, traction loc 3:55 gear, 160 amp 3G alternator
Wife's 2011 Flex Limited
Daily Driver 1994 Taurus LX
Project car 1986 Chrysler LeBaron convertible 2.2L Turbo II, modified A413
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Re: Kris Harrison's 1997 Diesel Issues

Gary Lewis
Administrator
Bill - I sent Brandon a link to this thread, so hopefully he'll see your helpful response soon.
Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker in front & 10.25 Spicer/Trutrac in back, & EEC-V MAF/SEFI

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Re: Kris Harrison's 1997 Diesel Issues

85lebaront2
Administrator
That was the idea, post something that will hopefully help.
Bill
"Getting old is inevitable, growing up is optional"
Darth Vader 1986 F-350 460 converted to MAF/SEFI, E4OD 12X3 1/2 rear brakes, traction loc 3:55 gear, 160 amp 3G alternator
Wife's 2011 Flex Limited
Daily Driver 1994 Taurus LX
Project car 1986 Chrysler LeBaron convertible 2.2L Turbo II, modified A413
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Re: Kris Harrison's 1997 Diesel Issues

grumpin
What Bill said, I know people who’ve had rough running PSD’s and an oil change cured it.
Dane
1986 F250HD SC XLT Lariat 4x4 460 C6
1992 Bronco XLT 4x4 351W E4OD
1998 Suburban LT K2500 454 4L80E
2000 Nissan Xterra XE 4WD 3.3 RE4R01A
Oregon
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Re: Kris Harrison's 1997 Diesel Issues

Bruno2
I have checked the oil level and all of the basic failure points regarding the 7.3. I even swapped the cam position sensor just for giggles even though I knew that wasnt the issue. The tach works when it cranks . When they don't on an OBS truck it is typically the CPS. The finger is pointed at the PCM. It is showing intermittent power failures. I havent tried swapping in an IDM. I have one on the shelf atvthe shop.

I am pretty sure it's the PCM. I an goingbto pull it this weekend,  open it up and give it a visual inspection.
Whitey: 1996 F 250 XL CCLB 4X4 7.3 DI ZF5 (The Work Horse) Lots of power mods
Whitey Jr: AKA Jr 1982 F 150 CCLB 4X4 351W C6 (Jr Work Horse) respectable power, but not over the top
The Bronco: 1987 Bronco XLT 351W C6 (needs work) Lots of off road mods and plenty of power mods
The Dodge: 2006 Ram 2500 CCSB 4X4 5.9 HO Cummins (The reliable ride that cant keep an AC in itself) (5th AC go around almost complete)
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Re: Kris Harrison's 1997 Diesel Issues

Gary Lewis
Administrator
Brandon - Don't miss that you can download that file.
Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker in front & 10.25 Spicer/Trutrac in back, & EEC-V MAF/SEFI

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Re: Kris Harrison's 1997 Diesel Issues

grumpin
Also might try fresh oil.
Dane
1986 F250HD SC XLT Lariat 4x4 460 C6
1992 Bronco XLT 4x4 351W E4OD
1998 Suburban LT K2500 454 4L80E
2000 Nissan Xterra XE 4WD 3.3 RE4R01A
Oregon
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Re: Kris Harrison's 1997 Diesel Issues

Bruno2
In reply to this post by Gary Lewis
Well today I set out to nail down the electrical gremlin. We discovered fuse #9 (completely different than Mambo #9) was blown.  Although this had never happened before I suspected it had something to do with it.  While ohming the fuses in the UHD PDB I got a funny reading on #9. It started to give the audible indicating the was a complete circuit. However, it stopped almost immediately.  I pulled it to findbthe infamous hanging
Whitey: 1996 F 250 XL CCLB 4X4 7.3 DI ZF5 (The Work Horse) Lots of power mods
Whitey Jr: AKA Jr 1982 F 150 CCLB 4X4 351W C6 (Jr Work Horse) respectable power, but not over the top
The Bronco: 1987 Bronco XLT 351W C6 (needs work) Lots of off road mods and plenty of power mods
The Dodge: 2006 Ram 2500 CCSB 4X4 5.9 HO Cummins (The reliable ride that cant keep an AC in itself) (5th AC go around almost complete)
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Re: Kris Harrison's 1997 Diesel Issues

Gary Lewis
Administrator
Brandon - I think you posted before you were done.  And I find it hilarious that you left us hanging by saying "I pulled it to findbthe infamous hanging"......  

But for the others, he found a wire that was power from the PCM Power Relay to the PCM and other things that was bad and grounding out.  Apparently that was causing the fuse to blow and stop the truck.  He said the truck started and he was driving it home from the shopping mall's parking lot where it quit last time I knew.
Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker in front & 10.25 Spicer/Trutrac in back, & EEC-V MAF/SEFI

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Re: Kris Harrison's 1997 Diesel Issues

Bruno2
The Garagemahal somehow left out about 4 patagraphs and a couple of pictures.  This is like the 3rd time this has happened.  The last time I remember wasxa tailgate thread. It takes the wind out of my sails when it happens. This phenomenon turns a lengthy fun story into see spot run because I am scared it will happen again.

I will try again later.
Whitey: 1996 F 250 XL CCLB 4X4 7.3 DI ZF5 (The Work Horse) Lots of power mods
Whitey Jr: AKA Jr 1982 F 150 CCLB 4X4 351W C6 (Jr Work Horse) respectable power, but not over the top
The Bronco: 1987 Bronco XLT 351W C6 (needs work) Lots of off road mods and plenty of power mods
The Dodge: 2006 Ram 2500 CCSB 4X4 5.9 HO Cummins (The reliable ride that cant keep an AC in itself) (5th AC go around almost complete)
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Re: Kris Harrison's 1997 Diesel Issues

Gary Lewis
Administrator
Sorry!  Are you doing that on a phone?
Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker in front & 10.25 Spicer/Trutrac in back, & EEC-V MAF/SEFI

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Re: Kris Harrison's 1997 Diesel Issues

Bruno2
Yes
Whitey: 1996 F 250 XL CCLB 4X4 7.3 DI ZF5 (The Work Horse) Lots of power mods
Whitey Jr: AKA Jr 1982 F 150 CCLB 4X4 351W C6 (Jr Work Horse) respectable power, but not over the top
The Bronco: 1987 Bronco XLT 351W C6 (needs work) Lots of off road mods and plenty of power mods
The Dodge: 2006 Ram 2500 CCSB 4X4 5.9 HO Cummins (The reliable ride that cant keep an AC in itself) (5th AC go around almost complete)