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Old 07-08-2012, 12:22 AM
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IDM Mod fail?

ok so I and my father inlaw ( a chief ET in the navy) did the IDM mod on my truck today I got the correct resistor from digikey, i forgot to disconnect the batteries, i removed the idm, removed the top, he unsoldered the 6042 resistor and soldered the new one in and then rtv'd it to the board for anti vibration, then rtved the top back on, clamped it and let it dry for 2 hours ,reinstalled. cranked,idle, reved it and it died. cranked,idle,reved it and it died. (good damn bit of black smoke). tightened down the 10mm screw on the plug. cranked,idled,reved. moved the truck 50 feet, put in park,idled, put in drive and it died. now no start. so i remember the batteries. dissconnect and then reconnect. double check the 10mm for tightness. still no start, no CEL, but i am seeing the batt light stay on.
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Old 07-08-2012, 07:26 AM
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You'll get more responses if you post this in the General Discussion or the Performance section... not many people wonder down into these areas.

I personally would have bought the Swamps IDM, as they add much more power than the diy idm mod.
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Old 07-08-2012, 08:03 AM
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Removing the idm without disconnecting the batteries won't hurt anything. I've done it on mine before. Take a look in the connector on the idm and make sure you didn't bend any pins over when you plugged it back in. Otherwise you may want to see if you can get your hands on a different idm that you can plug in and see if it starts. You may just have a different issue that happened to show up when you did the idm. An idm from any 7.3 will work.
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Old 07-08-2012, 09:39 AM
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whats got me confussed is it cranked up great,idled great, and when i reved it it died,twice, then it ran fine and i reved it a couple times and moved it,put it in park and then back to drive and it cut off and then no start
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Old 07-08-2012, 11:01 PM
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Sounds like the resistor was working then came loose. I would open the IDM again and check for a cold solider joint. Also check that the RTV you used isn't conductive.
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Old 07-09-2012, 07:03 PM
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Quote:
Originally Posted by JSchuricht View Post
Sounds like the resistor was working then came loose. I would open the IDM again and check for a cold solider joint. Also check that the RTV you used isn't conductive.
its not loose its the resistor is wrong its a 5% instead of a 1% and theres a burnt resistor and small spot of foil run that were replacing and then replacing the 75.0k "140v mod" resistor with the correct resistor
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