IDM R & R - Ford Powerstroke Diesel Forum
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post #1 of 22 Old 02-13-2013, 03:31 PM Thread Starter
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IDM R & R

since the codes show a bad IDM i'm going to replace it. any hints on how to do this? 1st i have to figure out where it is. i was told it is on the driver's side firewall & that i'll need to remove the black plastic inner fender. sound about right?
i've attached a photo. i believe the IDM is to the right on the firewall. i'm not sure what the unit to the left of it is. i also believe that the box on the fender well ( far right ) is the computer that runs the fuel injection system. can anyone verify this or point out my error(s)?
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post #2 of 22 Old 02-13-2013, 03:34 PM
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IDM R & R

Yes, that silver box to the right in the picture, the one attached to the Inner fender is the IDM, and yes it is responsible for controlling the Injectors.


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04 F350 6.0 LE Lariat CCLB DRW; Edge Insight CTS, SCT tuned, Blue Spring
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post #3 of 22 Old 02-13-2013, 03:41 PM
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It doesn't necessarily control the injectors, it just fires them when the PCM tells it to. They are known to wear out overtime, and will also get water in them that will short them out. Best way to troubleshoot it is to borrow a known good one and swap it in.

And its the big silver box on the fender. I believe its 3 bolts, and 1 large plug with a bolt in it. Very simple to remove. On the SD's its inside the fender, and a PITA to get to.

Jimmy
97 F-250 ECLB 7.3/E4OD/4wd, 216k miles: FFD 250/200%'s, stock turbo, built trans, e-fuel, Swamps IDM, shimmed 910's, Melling LPOP, welded cam gear/modified pick-up tube. Built and tuned by me

97 F-250 ECSB project truck:250/2's, Gen 3, S468, SD axles, studs/springs, ZF-6
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post #4 of 22 Old 02-13-2013, 04:11 PM
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the idm is on the far right of the picture to the left of it sticking through the firewall is the pcm

95 f250 eclb 4x4 under construction
96 f250 eclb 4x4 rosewood stage 1 injectors, bully dog 6 position chip, 6637 air filter, idm mod
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post #5 of 22 Old 02-13-2013, 05:34 PM Thread Starter
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this website is great!! the mechanic who told me the inner fender had to be pulled must have been thinking of the newer body style.
some questions:
-a couple years ago the driver's side valve cover gasket shorted. the shop i took the truck to said the short had fried part of the wiring harness, a couple of injectors & the injector computer. were they talking about the IDM?

Quote:
And its the big silver box on the fender. I believe its 3 bolts, and 1 large plug with a bolt in it. Very simple to remove. On the SD's its inside the fender, and a PITA to get to.
what does SD stand for?

-what is the unit to the left of the PCM?
thanks y'all
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post #6 of 22 Old 02-13-2013, 05:57 PM
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Sounds like they were talking about the idm, sd stands for superduty

-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


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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 #7 of 22 Old 02-14-2013, 02:36 PM Thread Starter
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i took the IDM off this afternoon it is a model 100. what is the difference between the models 100.100A, 110. & 120?

Last edited by rober; 02-15-2013 at 06:44 AM.
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post #8 of 22 Old 02-14-2013, 02:39 PM
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110 is obs, 120 is sd, it's the supplied voltage, and they cost 900 at ford, go for anywhere between $50-350 tho used

-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


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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 #9 of 22 Old 02-14-2013, 02:53 PM Thread Starter
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local dealer quoted me $650.00. has anyone dealt with midwest auto module out of toledo? he has 100% postive feedback on fleabay. $129.00 for a rebuilt with free shipping. he also supplies a free shipping label for returning the core. there is no core charge but if you return the your core he upgrades you to a lifetime warranty.
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post #10 of 22 Old 02-15-2013, 04:04 AM
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another option is to get an upgraded one from swamps

95 f250 eclb 4x4 under construction
96 f250 eclb 4x4 rosewood stage 1 injectors, bully dog 6 position chip, 6637 air filter, idm mod
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