Juice w/Attitude Engine Temp reading

[hackengineering]

I noticed this weekend while towing i am getting very conflicting gauge readings when it comes to my engine temp. I have an edge juice chip with the attitude controler. I have the Engine Temp as one of my read outs while driving. When i was pulling two trailers this weekend up the mountains i notices my original temp gauge located next to the spedo rose to nearly 220 maybe 225 while the attitude display made it to 204 and never moved and then quickly went back down once i was going down hill. My question is do these two gauges refrence two very diffrent temperatures. Possible one refrences the engine block the other is actual water. Do we know which is more reliable? Has anyone seen your Juice controller read higher than the 204 engine temp, mine has never been above that.

Thanks in advance.

 

[JasonCzerak]

I noticed this weekend while towing i am getting very conflicting gauge readings when it comes to my engine temp. I have an edge juice chip with the attitude controler. I have the Engine Temp as one of my read outs while driving. When i was pulling two trailers this weekend up the mountains i notices my original temp gauge located next to the spedo rose to nearly 220 maybe 225 while the attitude display made it to 204 and never moved and then quickly went back down once i was going down hill. My question is do these two gauges refrence two very diffrent temperatures. Possible one refrences the engine block the other is actual water. Do we know which is more reliable? Has anyone seen your Juice controller read higher than the 204 engine temp, mine has never been above that.

Thanks in advance.

the edge is taking it's data directly from the ECU via the data port. it shoulnd't be do any any "math" with it. In this case I'd suspect it's a gauge cluster deal.

 

[Cattletrkr]

Mine always corresponds almost exactly with the factory gauge.

 

[hackengineering]

I am suprised this is the first we have heard of this.

I am attaching the letter i recieved from Edge this morning. If we should post this somewhere else so we can get the word out let me know.

Thanks

CH





Here is what my engineers had to say on this area.





Here is a little background to help show the big picture. The Dodge VP44 has an ECM made by Cummins and a PCM made by Chrysler. The Cummins ECM (mounted on the driver side of the engine block) has a data link that allows a Cummins tool to talk with the ECM. This is also the same data link that the Juice module uses to make horsepower and get data from the truck. The PCM (mounted on the passenger side fire wall) on the VP44 does not communicate with the ECM on this data link, it uses a different bus.







The Juice module reads ECT directly from the ECM via the data link. The data size allocated on the data link bus for ECT only allows up to 204 degrees F. I do not know why, but that is the way it is. One might ask, why does the OEM ECT gauge on the dash go higher than 204 degrees? The answer is simple. The Cummins ECM gets the engine temp data from the ECT sensor. This data is then passed along to the PCM over the communication bus set up between the ECM and PCM. This bus has enough space allocated for ECT to allow the full range of temperatures to be reported to the OEM ECT gauge on the dash.







So to reiterate, the Juice module can only report a maximum of 204 degrees.











Jared Venz



Edge Products



Central Region Sales Manager



1080 S. Depot Dr.



Ogden, UT 84404

 

[Cattletrkr]

Ummm... . that apparently only applies to 2nd gens. Mine will go up to whatever the engine temp is. I've seen over 220 on the Attitude.

 

[hackengineering]

Yea if we want i was thinking of gathering any questions about this issue and replying to Mr. Venz. That is deffinetly one that i was interested in, which years are affected, and are there possibly any other gauges that the attitude gives incorrect readings due to the data size allocation.

CH