IDM R & R

[rober]

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)?
thanks

[jeepzj94]

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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[JD3020]

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.

[erics diesel]

the idm is on the far right of the picture to the left of it sticking through the firewall is the pcm

[rober]

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?

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

[351fifty]

Sounds like they were talking about the idm, sd stands for superduty

[rober]

i took the IDM off this afternoon it is a model 100. what is the difference between the models 100.100A, 110. & 120?

[351fifty]

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

[rober]

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.

[erics diesel]

another option is to get an upgraded one from swamps