IDM Modification problem - Ford Powerstroke Diesel Forum
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Old 06-22-2010, 05:39 PM
JDH JDH is offline
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IDM Modification problem

Went to perform the IDM mod today and experienced a problem with the factory resistor pulling loose the small square "pad" to which it was soldered. I used a 23 watt soldering iron and solder wick to remove the resistor in hopes of avoiding overheating the board. I can't seem to get solder to stick to the small tabs on the board and the original pad refuses to reattach. Anyone experience this problem? Any helpful advice is appreciated.
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Old 06-22-2010, 05:51 PM
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Dumb question but are you good at soldering?? I can solder wire but I would never solder on a board this important without testing on some junk board.
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Old 06-22-2010, 06:56 PM
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What you need to do is find another place to attach to. Your going to need a good meeter with some sharp fine tipped probes. Hopefully you can see the traces and follow them to a point you can attach, but basically, you need to figure out where the traces lead from the old resistor solder pad and attach your new resistor somewhere in that circuit.
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Old 06-23-2010, 02:30 AM
JDH JDH is offline
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I am decent at soldering since we do it at work from time to time. Just suprised that the attachement plate came off the board so quickly/easily. Looking at soldering to the trace but it goes under an IC chip quickly after leaving the resistor.
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Old 06-23-2010, 08:28 AM
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whats this mod supposed to do again? refresh me.
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Old 06-23-2010, 07:13 PM
JDH JDH is offline
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The mod should provide better idle and quicker throttle response or this is my understanding. I have been able to solder the resistor to the incoming trace but don't have a diagram/print to show where they terminate. Anyone have a diagram or know how the resistor is positioned in the circuit? The traces go under the chip beside it. REALLY need to know where the trace terminate so I can verify no cold solder joint exists. Thanks.

Last edited by JDH; 06-24-2010 at 05:05 PM.
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