Disconnect ground on both batteries







Remove IDM using 8mm socket.



Remove connector using 10 mm socket



Removing the cover, using a sharp blade or xacto knife, remove as much of the RTV that seals the cover as you can. (I couldn't get it off
and was going to damage the cover) I found that warming the cover with a heat gun softened the RTV sealant enough to easily pry it off.








Some of the tools you will need are shown here, a suitable soldering iron pencil size tip suitable for circuit board work, fine rosin core solder or silver solder, tweezers, needle nose pliers, Q tips & alcohol to clean residue off of pads after resistor chip is removed.




Add a little solder to the ends of the 6042 chip resistor and heat each end, moving the solder iron from end to end, when its hot enough it will loosen and can be pushed off of the pads with the tip of the iron. (Use caution not to burn or damage other components)




Clean the area of solder residue using Q tip and alcohol. Then add a little solder to each of the pads.



Form the resistor leads as shown.





Solder resistor to pads, inspect and clean area around pads you don't want any excess solder bridging to other near components. I used a small amount of super glue to secure the resistor body to the board.





Use suitable RTV sealant and replace cover. Use clamps or a weight to hold cover in place and allow to dry. (may take a few hours) I let it dry over night and installed the next day.

 

Well done!! Good pictures!

 

Rep. sent, great work!

 

this should be pinned to the top! great pictures.

 

where did you get the resistor and do you have a part number?

 

Great job description and super pictures reps sent.

 

Reps sent great write up.

 

fantastic! you have seriously raised the bar.

 

reps sent. very good write up and great pics.

How is working now with the mod done?

 

BTW you are the first of all I have read that mention the tip: that warming the cover with a heat gun softened the RTV sealant enough to easily pry it off.

Thats a good clue.

 

Thank you all for the kind replies!
I was up late putting it all together, got to bed about 4 am.
I had been following information about this mod for some time and was really inspired by (member Kevin C) who did a write up in January. I was able to obtain the resistor from (member blake 7.3).
The resistors are a bit hard to find, but available at the following link Digi-Key - PPC75.0KXCT-ND (Vishay/BC Components - SFR16S0007502FR500)

Last three numbers of IDM serial number is current volts

Here they are:
IDM-100 uses a 75.0k Ohm (75,000 ohm) 1/2 watt 1% tolerance Metal Film resistor
IDM-110 uses a 75.0k Ohm (75,000) 1/2 watt 1% tolerance Metal Film resistor
IDM-120 uses a 73.2k Ohm (73,200) 1/2 watt 1% tolerance Metal Film resistor

 

Great pics and writeup. Reps sent.

How's it working?

 

I have noticed some improvement from this mod, I think I notice a little power gain and smoother idle. It is a time consuming mod for the amount of gain, but the price is right.
My truck runs so much better with the few mods I have done.
In a couple of months when I hook up the almost 14k 5er & tow it to the lake (that will be a good test for power gain). I'll have to take it easy though as I haven't got a pyro gauge yet.

 

looking at your mods in sig, you should be fine with egt's since you haven't done anything to increase fuel yet. i have a chip, stock down pipe, only a K&N filter, and no guages so i get worried when i tow. you should be fine.

 

Great pics and tips! I've been a little confused about this one, but you cleared it all up. Reps sent!