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For those of you having trouble reading the sensor with your monitor here is what I have found so far.

I plugged both the sensors from my Pre and Post DPF into the Pre DPF plug. It will not read either sensor while plugged into the Pre location. I plugged both into the Post DPF plug nd they both functioned fine, and were readable on my EDGE CTS.

Clearly the Pre DPF system is faulty, most likely the plug itself.

Here is what Im going to try, in this order:

1. Take apart the connector on the Pre DPF sensor and see if it is dirty, clean it, and plug each individual wire into one sensor to see if it works. If it does I will reassemble the connector and try again.

2. If that fails Im going to try cutting off the plug for the Pre DPF and on the sensor and connect them directly without the connector. IF the system is good but the plug is bad this should work. Assuming it does I will solder the connections and heat shrink them.

3. If plan #2 fails I am going to get two wires larger than the wires to the plugs and solder them as extensions so I can use the Post DPF plug which I know works. Since the system is measuring resistance generated in the thermocouple based on heat on the bi-metal strips in that thermocouple the larger wires with good solder connections should not generate any additional resistance.

Hopefully one of the methods works, we shall see and I will report back the results.

I know, this seems like a lot of work but I am on a mission to MAKE it work. Wish me luck!
 

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Good luck, but it could also be a short in the wiring up stream of the plug.. There is probably a reference voltage sent to sensor. But don’t know for sure. Make sure you have that at the plug. If not your troubles may be farther up.
 

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I just got home for a short time. I pulled down the Pre DPf plug and found I could not get deep enough to take it apart, but I looked at the two pins and they were black.

I used the small blade on a Swiss Army knife and scraped them each on both sides. Bits of black crud fell off of both pins on both sides. I then took a small micro file and scraped both flat sides as well as the thin sides of each pin. When I was finished both pins were copper colored on all sides. I then blew out the plug to get rid of that crud.

Prior to plugging in a probe my monitor read 1836. After I plugged in one probe the temp read 90. This was with the probe just lying on the ground. I plugged in the second probe and got the same reading, 90. The ambient temp is about 90 so I believe I got it.

Now all I need is time to drill and tap the manifold. Not sure when that will happen, possibly not for a couple weeks, but it seems the system is working just fine. Im one step closer to having an operational EGT monitor.
 

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I gave up on mine, just bought a egt gauge and installed it.
Im too hard headed to give up on most things until I have exhausted EVERY possible idea I have or suggestions I find reasonable.

There is also for me a sense of satisfaction in making things work the way they should or could.

In addition I HATE also the idea of a mere mechanical device defeating me. My Teutonic brain would never let me live it down. :wink2:
 

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I'm sticking to the minimaxx turned off those sensors story. Its the only thing that makes sense. I plugged all three in, multiple ways and it just wouldn't work.
 

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I'm sticking to the minimaxx turned off those sensors story. Its the only thing that makes sense. I plugged all three in, multiple ways and it just wouldn't work.
That is possible, the Minimax is a "canned" tuner? Not a customizable EFI Live tune?

If that is the case I would most likely want to contact Minimax just to confirm your suspicions.

What I wanted was the EGT, TFT and ECT all in the same Edge CTS display, which is what I will have now.
 

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When tapping the hole, once it is drilled, besides loading the tap up with grease, do you keep the engine running?

I also had an idea of connecting up my shop vac to the exhaust to pull the chips down past the turbo up pipe. Obviously the engine would have to be off for this. Any thoughts on this idea?
 

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I started it and had it idled up. Chips blast you in the face so wear some protection.
Thanks, it is going to be a week and a half until I can get to it but I will post up the results when Im done.

Ive got a face shield so I will wear that, along with gloves and a long sleeve shirt.
 

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OK, got it done today, FINALLY!! Between the work, Honey-dos and other obligations I have not had time.

Drilled and tapped, done.
 

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Jrry261....did you ever confirm the Mini Maxx infact disabled the EGT sensors? I know someone with the same issue.
 
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