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post #1 of 36 Old 12-07-2012, 10:05 AM Thread Starter
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PCM

Just wondering how much the PCM or ECM is for a 99 7.3 orielys dosent have the priced listed on there website and how bad are they to replace im gunna do this myself I am a mechanic but havent had to do it on a diesel yet supprislingly.

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post #2 of 36 Old 12-07-2012, 10:19 AM
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its located under your dash iirc below the steering wheel, this is the obs section, but ours is located behind the e brake, has to be removed from under the hood. prices are not cheap unless you find a good used one, why are you replacing it btw?

-Kris-
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The stock downpipe in an OBS is flat because I'm a ginger.
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Finding a decent woman is like shopping for a used truck. You spend most of your time picking through the money pits, wrecks, and basket cases until you find one that you can tolerate
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Well at least you caught the loose bolts before they cause any damage. Nothing worse than a sloppy hole
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post #3 of 36 Old 12-07-2012, 01:35 PM Thread Starter
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Well the truck has a hicup basically it acts like as if I truned the engine off real quick and truned it back I just get my SES light and wts light then it goes away in 10 seconds and I keep drivin like nothin happened I replaced the cps sensor thinkin that was my problem but it wasnt whats wierd is it comes and goes truck will be fine for one week and then act up once twice the next so I'm thinkin its my pcm but I could be wrong I work on diesels all the time but not once has this ever happened so I'm alittle lost.

1999 F-350 Lariat 4x4 extended cab short bed single rear wheel locking hub 6speed manual 4.5inch lift Eagel alloy wheels 4inch flowmaster downpipe 4inch exhaust into side dump 5inch xpd se tip pyro pre turbo and boost gauge #6637 DIY Intake custom built box for 12inch subs and 2400 watt amp kicker comp 6x9 speakers in the doors

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post #4 of 36 Old 12-07-2012, 07:05 PM
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same exact thing happens to me when ever i use my cruise control, been happening ever since ford did the cruise control recall on it too, have you checked the codes its throwing at all?

-Kris-
2000 excursion V10 2wd 230k
2000 Excursion 7.3 4x4 246k
1995 CCLB DRW 324K
2001 CCLB DRW 319K
Dp tuner infinity, exhaust, intake, chipped, tricked, and wrecked


Quote:
Originally Posted by marine5811
The stock downpipe in an OBS is flat because I'm a ginger.
Quote:
Originally Posted by alberta 7.3
Finding a decent woman is like shopping for a used truck. You spend most of your time picking through the money pits, wrecks, and basket cases until you find one that you can tolerate
Quote:
Originally Posted by JJFLASH
Well at least you caught the loose bolts before they cause any damage. Nothing worse than a sloppy hole
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post #5 of 36 Old 12-07-2012, 07:24 PM
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Quote:
Originally Posted by PowerStroke_Lover View Post
Well the truck has a hicup basically it acts like as if I truned the engine off real quick and truned it back I just get my SES light and wts light then it goes away in 10 seconds and I keep drivin like nothin happened I replaced the cps sensor thinkin that was my problem but it wasnt whats wierd is it comes and goes truck will be fine for one week and then act up once twice the next so I'm thinkin its my pcm but I could be wrong I work on diesels all the time but not once has this ever happened so I'm alittle lost.
Have you tried to read codes or connect to the PCM? If so, does your scanner connect?

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post #6 of 36 Old 12-08-2012, 05:19 AM Thread Starter
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I've tried reading codes and I get nothin but the scanners aren't the best so there maybe codes that I can't read with the scanners I've used and I haved noticed that on the highway stayin at a steady 70mph it gets worse and is more frequent but below that less often and not as bad sadly my cruise control don't work lol.

1999 F-350 Lariat 4x4 extended cab short bed single rear wheel locking hub 6speed manual 4.5inch lift Eagel alloy wheels 4inch flowmaster downpipe 4inch exhaust into side dump 5inch xpd se tip pyro pre turbo and boost gauge #6637 DIY Intake custom built box for 12inch subs and 2400 watt amp kicker comp 6x9 speakers in the doors

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post #7 of 36 Old 12-08-2012, 05:28 AM
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im not exactly sure what the issue is but i wouldnt throw a computer at it , ses light and wait to start light can mean it is losing power to pcm at times ,i would suggest unplugging the fuel heater and drive it and see if that makes any difference , whatever you try always try one thing at a time ,so you will know what made the difference , check all your fuse connections inside and outside fuse box and check over wiring real good to make sure of no chaffing

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post #8 of 36 Old 12-08-2012, 07:01 AM Thread Starter
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Quote:
Originally Posted by SCUFFY828 View Post
im not exactly sure what the issue is but i wouldnt throw a computer at it , ses light and wait to start light can mean it is losing power to pcm at times ,i would suggest unplugging the fuel heater and drive it and see if that makes any difference , whatever you try always try one thing at a time ,so you will know what made the difference , check all your fuse connections inside and outside fuse box and check over wiring real good to make sure of no chaffing
Well I've gone through all the wiring that was the first thing I did the area that has any concenerable wear is the transfer case wiring for my light but my exhaust just melted the plastic cover I put on it other wise wiring is old but intact havent gone through my fuses yet but why would my fuel heater cause the problem its like I said every powerstroke I have ever worked on never had this problem and would adding diesel additive have somethin to do with it cuz I bought a bottle of DP to run through it for this winter for anti fuel geling but its also boostes my creatine level and cleans the injectors im alittle over half way through a 150 gallon treatment.

1999 F-350 Lariat 4x4 extended cab short bed single rear wheel locking hub 6speed manual 4.5inch lift Eagel alloy wheels 4inch flowmaster downpipe 4inch exhaust into side dump 5inch xpd se tip pyro pre turbo and boost gauge #6637 DIY Intake custom built box for 12inch subs and 2400 watt amp kicker comp 6x9 speakers in the doors

OIF 02-22-08 to 08-10-08
MEU 03-20-10 to 11-11-10
Semper Fi DEVIL DOG
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post #9 of 36 Old 12-08-2012, 07:51 AM
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Quote:
Originally Posted by PowerStroke_Lover View Post
I've tried reading codes and I get nothin but the scanners aren't the best so there maybe codes that I can't read with the scanners I've used and I haved noticed that on the highway stayin at a steady 70mph it gets worse and is more frequent but below that less often and not as bad sadly my cruise control don't work lol.
Even the "best" mainstream scanners don't read our trucks. You need AutoEnginuity, an AeroForce Scangauge, or a Snap-On MT2500 or Modis.
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post #10 of 36 Old 12-08-2012, 08:44 AM
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When you went through the wiring did you remove the harness from the PCM and look at both connectors? Eventually the weather seal will fail and water getting into the connector starts rusting the pins. Just a clean and go deal.

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