Go Back   Ford Truck Enthusiasts Forums > Diesel > 1994.5 - 1997 7.3L Power Stroke Diesel
Sign in using an external account
Register Forgot Password?


1994.5 - 1997 7.3L Power Stroke Diesel SPONSORED BY:

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 06-28-2013, 08:27 AM
OldWoodsDiesel's Avatar
OldWoodsDiesel OldWoodsDiesel is offline
Posting Guru
 
Join Date: Oct 2011
Location: Exton, PA
Posts: 1,483
OldWoodsDiesel is gaining momentum as a positive member of FTE.
possible truck purchase but "needs pcm"

so, my search for a crew cab truck continues, but one just came on the market nearby with lots of miles but a body that's in reasonable shape. if the guy would come down in price a bit, i'd consider buying it, but a line in his ad says: "needs pcm."

my question is: could swapping my good PCM into his truck with a potentially suspect electrical system kill my PCM? i'm figuring the obvious answer is yes, if there is a short in the system somewhere that killed his PCM in the first place, it would just kill mine again, right quick. but if it was just water that go into his PCM, or some internal fault of the PCM, swapping mine in would be OK.

before I just swapped it over, though, i'd hook up my AF scanguage to his truck and see what it says. as long as it communicates, then, the PCM is not totally fried and should tell me what's, wrong, right? if I get nothing on the scanguage, his PCM is, indeed, cooked and mine may well be soon, too if I swap it in, right?

my first thought is that the truck just stopped running on him and if he's inexperienced with these engines, he may just assume its a pcm problem, but could well be a cps, ipr, #22 fuse etc. it'd be easy enough to shake down that issue, given some time, though.

any quick thoughts on the matter would be much appreciated, as i'm hoping to go see the truck this afternoon...

thanks!
__________________
JP
96 F250 SCLB 4x4 7.3L PSD - RED (RIP - the part out has begun)
97 F350 CCLB 4x4 7.3L PSD - WHITE (361k mi - DD, auto->ZF5, 3.55LS, 6637, 3"DP->StraightPipe, 33x12.5x16.5's, object of more upgrades)
97 F250 RCLB 2WD 5.8L gas - BLUE (ZF5, 3.55, distant-future-project-truck - 235k mi)
Reply With Quote
  #2  
Old 06-28-2013, 08:40 AM
bryanlindborg600's Avatar
bryanlindborg600 bryanlindborg600 is offline
Senior User
 
Join Date: Jul 2009
Location: Bellingham, WA
Posts: 459
bryanlindborg600 is gaining momentum as a positive member of FTE.
Quote:
Originally Posted by OldWoodsDiesel View Post
so, my search for a crew cab truck continues, but one just came on the market nearby with lots of miles but a body that's in reasonable shape. if the guy would come down in price a bit, i'd consider buying it, but a line in his ad says: "needs pcm."

my question is: could swapping my good PCM into his truck with a potentially suspect electrical system kill my PCM? i'm figuring the obvious answer is yes, if there is a short in the system somewhere that killed his PCM in the first place, it would just kill mine again, right quick. but if it was just water that go into his PCM, or some internal fault of the PCM, swapping mine in would be OK.

before I just swapped it over, though, i'd hook up my AF scanguage to his truck and see what it says. as long as it communicates, then, the PCM is not totally fried and should tell me what's, wrong, right? if I get nothing on the scanguage, his PCM is, indeed, cooked and mine may well be soon, too if I swap it in, right?

my first thought is that the truck just stopped running on him and if he's inexperienced with these engines, he may just assume its a pcm problem, but could well be a cps, ipr, #22 fuse etc. it'd be easy enough to shake down that issue, given some time, though.

any quick thoughts on the matter would be much appreciated, as i'm hoping to go see the truck this afternoon...

thanks!
I agree there is always a risk when swapping electrical parts, but i recently got done diagnosing my truck and swapped idm's from truck to truck,BUT, I took my thought to be bad idm and put it into my known to be good running truck to diagnose, I would recommend that if you eliminate all the other possible "no start" or reason to post "needs PCM" issue! But it was still a risk when I decided to take the good idm and run it in my truck that had the bad one, but it has been a few weeks and all is well!! Electrical shat can just quit, so the risk I think is low.....?
Reply With Quote
  #3  
Old 06-28-2013, 09:01 AM
OldWoodsDiesel's Avatar
OldWoodsDiesel OldWoodsDiesel is offline
Posting Guru
 
Join Date: Oct 2011
Location: Exton, PA
Posts: 1,483
OldWoodsDiesel is gaining momentum as a positive member of FTE.
good point - if it reads dead with the scanner, I can assume it won't start my truck either. if it reads alive, but with problems and I can't pinpoint it to an exact cause, swapping it into my truck and confirm it runs my truck OK would say that it is an engine-side electrical problem and not a pcm-side issue.

its a fine line to walk either way in this case - I don't want to fix the truck in front of him because then his price will go up or he won't sell at all. I also don't want to buy a truck that is unfixable. I guess that's why i'll plan on not paying much for it and just go ahead and sell it again or part it out if I can't fix it with a reasonable amount of time and effort...
__________________
JP
96 F250 SCLB 4x4 7.3L PSD - RED (RIP - the part out has begun)
97 F350 CCLB 4x4 7.3L PSD - WHITE (361k mi - DD, auto->ZF5, 3.55LS, 6637, 3"DP->StraightPipe, 33x12.5x16.5's, object of more upgrades)
97 F250 RCLB 2WD 5.8L gas - BLUE (ZF5, 3.55, distant-future-project-truck - 235k mi)
Reply With Quote
  #4  
Old 06-28-2013, 09:30 AM
bryanlindborg600's Avatar
bryanlindborg600 bryanlindborg600 is offline
Senior User
 
Join Date: Jul 2009
Location: Bellingham, WA
Posts: 459
bryanlindborg600 is gaining momentum as a positive member of FTE.
Quote:
Originally Posted by OldWoodsDiesel View Post
good point - if it reads dead with the scanner, I can assume it won't start my truck either. if it reads alive, but with problems and I can't pinpoint it to an exact cause, swapping it into my truck and confirm it runs my truck OK would say that it is an engine-side electrical problem and not a pcm-side issue.

its a fine line to walk either way in this case - I don't want to fix the truck in front of him because then his price will go up or he won't sell at all. I also don't want to buy a truck that is unfixable. I guess that's why i'll plan on not paying much for it and just go ahead and sell it again or part it out if I can't fix it with a reasonable amount of time and effort...
That's true! Sounds like you know about all you could know to Hopedully diagnose without actually fixing it and get a steal of a deal!! You might almost feel bad if you get it dirt cheap and its an easy fix, but hopefully that only last for a few seconds!! Lol!! Good luck man!!
Reply With Quote
  #5  
Old 06-28-2013, 10:34 AM
pjwoolw's Avatar
pjwoolw pjwoolw is offline
Postmaster
 
Join Date: Nov 2005
Location: San Ramon Ca.
Posts: 3,163
pjwoolw has a great reputation on FTE.pjwoolw has a great reputation on FTE.pjwoolw has a great reputation on FTE.pjwoolw has a great reputation on FTE.pjwoolw has a great reputation on FTE.
PCMs sometimes just stop working for no reason other than a internal component failure. So if you trust that the seller hasn't done anything to the rig to cause the failure I would give it a shot. Also Python Injection is a good outfit for PCM repair.
__________________
Pete in San Ramon
2005 F250 6.0 Lariat 4x4 CC Short bed (stock)
1997 F250 7.3 XLT 4X4 Reg. cab 1.0 housing Banks wheel AC injectors T500 Farmers Diesel pushrods Diamond Eye 4" exhaust DP F6 chip Electric fuel S@B intake

Reply With Quote
  #6  
Old 06-28-2013, 11:09 AM
OldWoodsDiesel's Avatar
OldWoodsDiesel OldWoodsDiesel is offline
Posting Guru
 
Join Date: Oct 2011
Location: Exton, PA
Posts: 1,483
OldWoodsDiesel is gaining momentum as a positive member of FTE.
Quote:
Originally Posted by bryanlindborg600 View Post
You might almost feel bad if you get it dirt cheap and its an easy fix, but hopefully that only last for a few seconds!! Lol!! Good luck man!!
thanks! I won't feel that bad. if he's just given up on it and wants some money for a truck he can't fix, then i'm happy to take that deal!

Quote:
Originally Posted by pjwoolw View Post
PCMs sometimes just stop working for no reason other than a internal component failure. So if you trust that the seller hasn't done anything to the rig to cause the failure I would give it a shot. Also Python Injection is a good outfit for PCM repair.
good to know - part of buying this truck would be converting it over to manual, though, and I already have a manual PCM in my barn ready to go in. the truck is auto now, though, so i'd have to get it fixed and working with the pcm from my other psd, though, which is [still] auto.

hopefully the truck isn't a big rust bucket though - that would be a dealbreaker.
__________________
JP
96 F250 SCLB 4x4 7.3L PSD - RED (RIP - the part out has begun)
97 F350 CCLB 4x4 7.3L PSD - WHITE (361k mi - DD, auto->ZF5, 3.55LS, 6637, 3"DP->StraightPipe, 33x12.5x16.5's, object of more upgrades)
97 F250 RCLB 2WD 5.8L gas - BLUE (ZF5, 3.55, distant-future-project-truck - 235k mi)
Reply With Quote
  #7  
Old 06-28-2013, 12:08 PM
Hussler's Avatar
Hussler Hussler is offline
Postmaster
 
Join Date: Sep 2007
Location: Medford Oregon
Posts: 2,981
Hussler has a great reputation on FTE.Hussler has a great reputation on FTE.Hussler has a great reputation on FTE.Hussler has a great reputation on FTE.Hussler has a great reputation on FTE.
Might just be fuse #22 ... if so

Don't tell the owner.
Negotiate a good price.
Tow it around the block.
Unplug fuel heater and replace fuse #22.
Start it up and drive past his place honking horn.

__________________
Jim

1997 F250 HD CC 4x4 7.3L - E4OD - 3.55's
Napa 6637 - FPR Shim 3" Down Pipe & CD 203 Stat
Riffraff
HPX - Interceptor Scan Gauge - Cobalt Digital Pyro
Reply With Quote
  #8  
Old 06-28-2013, 12:29 PM
fordman67 fordman67 is online now
Post Fiend
 
Join Date: Dec 2005
Location: evansville in
Posts: 6,129
fordman67 has a good reputation on FTE.fordman67 has a good reputation on FTE.fordman67 has a good reputation on FTE.
If the body is nice..and the price is cheap enough...who cares ...anything is fixable...its a cc!
Reply With Quote
Old 06-28-2013, 12:29 PM
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
AD vs. AE injector in cylinder 8 Pikachu 1999 - 2003 7.3L Power Stroke Diesel 35 03-11-2014 07:40 PM
Power Loss Problem Solved - BARO sensor was the culprit OldWoodsDiesel 1994.5 - 1997 7.3L Power Stroke Diesel 42 12-21-2013 01:02 PM
pcm again... bcaughhorn 1999 - 2003 7.3L Power Stroke Diesel 2 06-07-2012 10:24 PM
Gold Superchip lhud 1999 - 2003 7.3L Power Stroke Diesel 1 12-18-2007 10:17 PM
Banks Stinger Plus Impression!!! 18vtx00 1999 - 2003 7.3L Power Stroke Diesel 27 01-28-2005 07:09 PM


Go Back   Ford Truck Enthusiasts Forums > Diesel > 1994.5 - 1997 7.3L Power Stroke Diesel

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump



All times are GMT -5. The time now is 11:15 PM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup