IDM Issues - Misfire?
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Freshman User
Joined: Mar 2011
Posts: 46
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From: McKinleyville
IDM Issues - Misfire?
Im having a problem (while driving) as what i can only describe as a miss-fire (injector cutting out?) I was told at a shop that it was my IDM, i bought one from Oriley's cause it was 600$ and the one from Ford was 1300$, the truck runs great until the "misfire"
i know that there is a good possibility that the IDM (since its from ORielys and cheap) could still be the issue.
MY worry is spending the 1300# for the Ford IDM and there still being an issue (and the 600$ worked just fine....)
is there something else it could be or a way to test it?
IDM - Injector Driver Module
i know that there is a good possibility that the IDM (since its from ORielys and cheap) could still be the issue.
MY worry is spending the 1300# for the Ford IDM and there still being an issue (and the 600$ worked just fine....)
is there something else it could be or a way to test it?
IDM - Injector Driver Module
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
If it's doing the exact same thing with 2 different IDM's, then it's probably not your new IDM and likely wasn't the old one either.
When the misfire occurs, is it constant like the injector just quits, or just a slight hiccup every once in a while? Does the CEL come on when the truck does this?
When the misfire occurs, is it constant like the injector just quits, or just a slight hiccup every once in a while? Does the CEL come on when the truck does this?
Lead Driver
Joined: Dec 2012
Posts: 7,874
Likes: 48
From: Tennessee
I have gotten bad a bad IDM or two ,or more ! I have put them in that were worse than the one removed . Have all the tests done , KOEO , KOER , CYL Cont, Buzz test , Memory ect . Some codes set are sure IDM fault . They did diagnose ? Not just guess ? Could be as simple as a Cam sensor . DO NOT get one anywhere but Ford if it is a bad cam sensor . Anyway , make sure it is diagnosed properly.That can save a lot of time , headaches , and money .
Post Fiend
Joined: May 2009
Posts: 5,470
Likes: 3
From: Pea Ridge, AR
Although I don't believe the IDM is your issue. At least save yourself a considerable amount of money by shopping around for IDM's Clay had them.
Riffraff Diesel: Alliant OEM 7.3L Injector Driver Module IDM
I would inspect the wiring going around the DS shock tower, over the DS valve cover and near the front lift hook on the DS, to ensure there is no chaffing. Beyond that either ohming out the UVCH, or using diagnostic tools to perform BUZZ tests, or look for possible codes.
Riffraff Diesel: Alliant OEM 7.3L Injector Driver Module IDM
I would inspect the wiring going around the DS shock tower, over the DS valve cover and near the front lift hook on the DS, to ensure there is no chaffing. Beyond that either ohming out the UVCH, or using diagnostic tools to perform BUZZ tests, or look for possible codes.
Thread Starter
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Freshman User
Joined: Mar 2011
Posts: 46
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From: McKinleyville
Northern California, i guess im wondering why new one wouldnt work. one didnt fire all the cylinders, 2 others onyl 4 of them, this last one works fien (MOST OF THE TIME!) but misses sometimes. is it because the idm now are remanned? if i got one out of a truck that i knew worked shoudnt it work in mine?
also my truck is a PRE 99 (same body as 9-03) different IDMs though, also idm are different for manuals and autos
on that note, the tranny is a 6 speed ( granny, 1-4, ovr driver) that a 6 not a 5 right? granny counts?
also my truck is a PRE 99 (same body as 9-03) different IDMs though, also idm are different for manuals and autos
on that note, the tranny is a 6 speed ( granny, 1-4, ovr driver) that a 6 not a 5 right? granny counts?
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Cargo Master
Joined: Feb 2005
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Same IDM for both. The OBS trucks used a 110v version I believe, while the superduties use a 120v, BUT they should work if interchangeably from what I've read. Cali is a little far from me, but if you can find someone who has a truck like ours that will let you try theirs it should rule out the IDM.
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Thread Starter
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Freshman User
Joined: Mar 2011
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From: McKinleyville
different idm for pre99 and 99-03
the part numbers are completly differnt, i used one from a 99-03, the truck ran, but reaked like diesel, they said the idm was wrong and the injectors werent workign right and even though it was running fine, it woudl eventually blow the injectors
unless you meant manual or auto are the same
the part numbers are completly differnt, i used one from a 99-03, the truck ran, but reaked like diesel, they said the idm was wrong and the injectors werent workign right and even though it was running fine, it woudl eventually blow the injectors
unless you meant manual or auto are the same
Cargo Master
Joined: Feb 2005
Posts: 2,837
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Yes, manual and auto are the same. The difference between the pre-99 IDM and the 99-03 IDM is 10v. I have been told that they are interchangeable, but I have no evidence to back that up. My current IDM is running 140v, and there is improved performance.
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
I'd put real dollars on a table, betting the "mechanic" pulled a code and it said IDM. My last IDM code just said IDM fault, and that was the whole message after a momentarty SES light. I conducted a KOEO test with my trusty-dusty AE and a message popped up that will have you all singing the same acronym: "Number 4 injector open low"
BigAlsPSD even cued up the acronym.
Hotshot
Joined: Jan 2011
Posts: 18,849
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From: Puget Sound
Lead Driver
Joined: Dec 2012
Posts: 7,874
Likes: 48
From: Tennessee
Oh for the love of.... Apparently Brother JWC 3 was not afforded full credence here. I'd like to call out his contribution. Everybody breathe in and breathe out for a moment. If you smoke, light one up (known in Kansas as a "thinkin' stick").
I'd put real dollars on a table, betting the "mechanic" pulled a code and it said IDM. My last IDM code just said IDM fault, and that was the whole message after a momentarty SES light. I conducted a KOEO test with my trusty-dusty AE and a message popped up that will have you all singing the same acronym: "Number 4 injector open low"
BigAlsPSD even cued up the acronym.
I'd put real dollars on a table, betting the "mechanic" pulled a code and it said IDM. My last IDM code just said IDM fault, and that was the whole message after a momentarty SES light. I conducted a KOEO test with my trusty-dusty AE and a message popped up that will have you all singing the same acronym: "Number 4 injector open low"
BigAlsPSD even cued up the acronym.
. Some are not willing to look for new input . I am open for all sugestions .
A good scanner can save a lot of heartache . I just saw someone spend $7500 .00 on a PS because of a bad cam sensor ! 2 from parts store , new IDM ,Head work ,injectors , ect .... FoMoCo cam sensor fixed it . Good diagnostics , good parts , THEY MAKE ALL the difference . My OTC and my MODIS help me , but , open for input .