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We are privately owned, with access to a professional Diesel Mechanic, who can provide additional support for Dodge Ram Cummins Diesel vehicles. Many detailed information is FREE and available to read. However, in order to interact directly with our Diesel Mechanic, Michael, by phone, via zoom, or as the web-based option, Subscription Plans are offered that will enable these and other features. Go to the Subscription Page and Select a desired plan. At any time you wish to cancel the Subscription, click Subscription Page, select the 'Cancel' button, and it will be canceled. For your convenience, all subscriptions are on auto-renewal.
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Well, since I've taken it upon myself today to solve the mystery of my truck's poor performance on 2-stroke oil (see cumminsforum), as a side effect I solved the mystery of the boost formula.
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boost fooling from the ez. Remember the obdlink is showing you what the ECM is seeing, the Edge is limiting what hte ecm sees.
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Hunting for hidden data that the VP44, ECM, PCM, ABS, SRS, etc might be talking over the bus and being able to read this hidden data. Later on like after 04.5 it seem most OBDII PID data is consistent
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Welcome To Mopar1973Man.Com LLC
We are privately owned, with access to a professional Diesel Mechanic, who can provide additional support for Dodge Ram Cummins Diesel vehicles. Many detailed information is FREE and available to read. However, in order to interact directly with our Diesel Mechanic, Michael, by phone, via zoom, or as the web-based option, Subscription Plans are offered that will enable these and other features. Go to the Subscription Page and Select a desired plan. At any time you wish to cancel the Subscription, click Subscription Page, select the 'Cancel' button, and it will be canceled. For your convenience, all subscriptions are on auto-renewal.
Ok gang... I'm going to share a few tidbit of information for advance OBDII tinkering.
If you happen to have a OBDLink or ELM327 tool you should be able to tag along here. I will have to give a bit of thanks to @Me78569 for getting me started with the Bluetooth terminal on Android. Once I had that I could directly communicate with the OBDLink and pass commands to it. So starting out I passed the command...
ATSP0
This basically tells the tool to communication with the detected protocol of the vehicle ours happens to be ISO 9141-2 protocol. After that I passed the command...
0100
Which happens to be PID Mode 01 with the PID 00 which tells the vehicle to report back which ODBII PID are available. It returns back.
41 00 98 3A 80 14 41 00 90 18 80 14
At this point the hexadecimal bytes you want are 98, 3A, 90, 18...
So now you need to take these 4 bytes on convert them to binary.
98 = 1001 1000
3A = 0011 1010
90 = 1001 0000
18 = 0001 1000
So now lay it all out in one long string. This is counting 20 hex (32 dec) from left to right.
1001 1000 0011 1010 1001 0000 0001 1000
So you have counting only the high bit (1's)...
01 - MIL Status Light
04 - Engine Load
05 - Coolant Temperature
(11) 0B - Manifold Pressure
(12) 0C - RPM
(13) 0D - MPH
(15) 0F - Intake Temperature
(17) 11 - APPS Sensor
(20) 14 (Unknown yet)
(28) 1C - OBD Compliance should report 05 hex.
(29) 1D - (Unknown yet)
NOTE: (number) is decimal... Just for the human side for counting placement. ECM/PCM use the hexadecimal values only.
Now if you want to add any of these as a custom gauge.
Module/Header: 486
OBD Mode: 01
PID Number: (Any of the above will work use only the Hex number not the decimal)
Priority: Leave on High
Equation: Look it up on Wikipedia at https://en.wikipedia.org/wiki/OBD-II_PIDs
Edited by Mopar1973Man