I just recieved my copy of DIESELPOWER and there is a good write up about the IDM mod it even has pictures. after reading it I'm thinking I'll do it myself. I'm adding it to the list of other things to do
so theres only the one resistor that has 6042 on it and thats the one i need to change right ?
There are 4 styles of IDM that I am aware of.
IDM 100
IDM 100a
IDM 110
IDM 120
That looks to me to be either an IDM 100, or an IDM 100a.
As far as Im aware, you only change the one resistor marked 6042.
For those of you that just "break and remove" the old resistor, A word of warning. You can very easily "tear" or "lift" the copper pad that is bonded to the circuit board material. If this happens, you are seriously screwed. I've done better than 2 dozen IDM mods now, and havent had any lift on me yet, but then, I use solder wick and a really hot, small, chisel point to get the solder off.
Im curious how the article in the magazine looks like. Joe Servo managed to keep the mod a "secret" for many years. *NO ONE* would post what it was he did, even tho several ppl knew the "secret".
I finally got someone to send me their modded IDM (I wasnt about to shell out 300 bucks! for Joe to do mine). I opened up his case, found the changed part, did some math, and posted my findings. It has since become a "common" mod, but ppl do still get scared of the whole electronics thing.
I just did the mod tonight on my 100a IDM module, PIECE OF CAKE !!
Like said earlier, just use a good soldering iron, some desoldering braid and some good solder.
I scraped the board with a razor to get a clean work area too...
Whole process including case opening took under 10 minutes !!
"But these are not ordinary radio shack resistors! They are special, high tolerance, heat resistive,
metal film resistors that are about 40 cents a piece, versus your usual 5 cent rat-shack ones.
Its imperative that you use high quality parts as any drifting of the values could result in a
blown IDM."
Where where I aquire the appropriate resistor?
"DigiKey sells the needed resistors:
75.0KX (Violet-Green-Black-Red-Brown)
73.2KX (Violet-Orange-Red-Red-Brown)"
Never heard of DigiKey, is there a local place I can go to deal with somebody face to face?
I called around to a bunch of electronic supply houses and could not come up with any that met those specs, I ended up ordering them from Digikey.com and it was good service, a little pricy on the shipping, but I had the resisters (cause I had to buy 5) in two days. cost was $5.99 including shipping.
Justin
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'96 F250 HD Crew Cab Short Bus, built E40d, 4.10 ls 305s on stock Alcoas IDM mod
Powerstroke
Nice to know someone at Diesel power is paying attention!
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Linear Mode
