TephraMod V7 & Omni 4 Bar MAP Sensor - Can't Log Boost - Help
Aug 1, 2011, 03:08 PM
#1
TephraMod V7 & Omni 4 Bar MAP Sensor - Can't Log Boost - Help
I did several searches but couldn't find anything that helped.
I am in the process of getting tuned and switching over to TephraMod V7 (94170715-v7). I am using the Omni 4 Bar MAP Sensor to log boost, and the Grimmspeed 3 Port for ECU boost control.
The problem that I am having is getting EvoScan v2.7 to log boost. I get a constant 36.7704 psi as a boost value in EvoScan. My tuner has no idea why this is happening.
I have attached a picture showing how I have the Omni 4 Bar set up in EvoScan. Most of my driving is at 500 to 700 feet above sea level, so I am using 14.4 in the formula.
Does anyone see a problem with the way it is set up, or have any idea why I can't log boost?
Thanks,
Dan (drb)
I am in the process of getting tuned and switching over to TephraMod V7 (94170715-v7). I am using the Omni 4 Bar MAP Sensor to log boost, and the Grimmspeed 3 Port for ECU boost control.
The problem that I am having is getting EvoScan v2.7 to log boost. I get a constant 36.7704 psi as a boost value in EvoScan. My tuner has no idea why this is happening.
I have attached a picture showing how I have the Omni 4 Bar set up in EvoScan. Most of my driving is at 500 to 700 feet above sea level, so I am using 14.4 in the formula.
Does anyone see a problem with the way it is set up, or have any idea why I can't log boost?
Thanks,
Dan (drb)
Aug 3, 2011, 12:59 AM
#5
Your best bet would be to check the voltage on the respective pin when the ignition is turned on and see whether the voltage corresponds to your local atmospheric pressure. 
This way you'll know if the problem is mechanical or software based. With this information it would be much easier to solve the situation.
This way you'll know if the problem is mechanical or software based. With this information it would be much easier to solve the situation.
Aug 3, 2011, 11:19 AM
#7
1. I installed the the Omni 4 Bar MAP Sensor - plugs right in to the same connector that was used by the stock sensor.
2. My tuner supplied me with an xml file for the Tephra V7 that he is using on the tune. I put the xml file in the ECUFlash rometadata folder for the evo.
3. I changed the data in EvoScan as shown in my original post above.
Am I missing something?
Last edited by drb; Aug 3, 2011 at 11:23 AM.
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Aug 3, 2011, 11:21 AM
#8
Your best bet would be to check the voltage on the respective pin when the ignition is turned on and see whether the voltage corresponds to your local atmospheric pressure. This way you'll know if the problem is mechanical or software based. With this information it would be much easier to solve the situation.
This way you'll know if the problem is mechanical or software based. With this information it would be much easier to solve the situation.Yellow Wire - Manifold Differential Pressure Sensor - Pin #73
Black Wire - Sensor Ground - Pin #92
Grey Wire - Power +5volts - Pin #81
Aug 3, 2011, 01:37 PM
#9
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Has he messed with the MUT table in the rom he sent you? All the evoscan info looks correct.
Might not hurt to just download a "stock" copy of the rom you are using from the V7 thread and load it up too see if it changes anything. Maybe do the same for the xml files too...
Might not hurt to just download a "stock" copy of the rom you are using from the V7 thread and load it up too see if it changes anything. Maybe do the same for the xml files too...
Aug 3, 2011, 02:47 PM
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I didn't really need to follow all the steps (I don't think). Let me know if I'm wrong.
1. I installed the the Omni 4 Bar MAP Sensor - plugs right in to the same connector that was used by the stock sensor.
2. My tuner supplied me with an xml file for the Tephra V7 that he is using on the tune. I put the xml file in the ECUFlash rometadata folder for the evo.
3. I changed the data in EvoScan as shown in my original post above.
Am I missing something?
1. I installed the the Omni 4 Bar MAP Sensor - plugs right in to the same connector that was used by the stock sensor.
2. My tuner supplied me with an xml file for the Tephra V7 that he is using on the tune. I put the xml file in the ECUFlash rometadata folder for the evo.
3. I changed the data in EvoScan as shown in my original post above.
Am I missing something?
Aug 4, 2011, 02:07 AM
#13
I mean to check the voltage on the pin #73 in your case (pin # are different for VII and IX) and see whether the signal wire voltage corresponds to the voltage that should be observed under your local atmospheric pressure (just to make it clear - you need to know the voltage that goes to the ECU through that wire). Should be done with ignition turned on, but the car not running.
It takes 3mins if you have necessary equipment and gives you clear understanding of the nature of the problem.
If it will show something a bit lower than 1.168V - your sensor and wiring is ok and you should check the software, if the reading is way off from the above mentioned value - either wiring is damaged or sensor is not working.
It is that easy and much more efficient than online brainstorming without sufficient input data.
It takes 3mins if you have necessary equipment and gives you clear understanding of the nature of the problem.
If it will show something a bit lower than 1.168V - your sensor and wiring is ok and you should check the software, if the reading is way off from the above mentioned value - either wiring is damaged or sensor is not working.It is that easy and much more efficient than online brainstorming without sufficient input data.
Last edited by vd; Aug 4, 2011 at 02:09 AM.
Aug 5, 2011, 05:03 PM
#14
I mean to check the voltage on the pin #73 in your case (pin # are different for VII and IX) and see whether the signal wire voltage corresponds to the voltage that should be observed under your local atmospheric pressure (just to make it clear - you need to know the voltage that goes to the ECU through that wire). Should be done with ignition turned on, but the car not running.
It takes 3mins if you have necessary equipment and gives you clear understanding of the nature of the problem. If it will show something a bit lower than 1.168V - your sensor and wiring is ok and you should check the software, if the reading is way off from the above mentioned value - either wiring is damaged or sensor is not working.
It is that easy and much more efficient than online brainstorming without sufficient input data.
It takes 3mins if you have necessary equipment and gives you clear understanding of the nature of the problem.
If it will show something a bit lower than 1.168V - your sensor and wiring is ok and you should check the software, if the reading is way off from the above mentioned value - either wiring is damaged or sensor is not working.It is that easy and much more efficient than online brainstorming without sufficient input data.
Aug 6, 2011, 08:13 PM
#15
I mean to check the voltage on the pin #73 in your case (pin # are different for VII and IX) and see whether the signal wire voltage corresponds to the voltage that should be observed under your local atmospheric pressure (just to make it clear - you need to know the voltage that goes to the ECU through that wire). Should be done with ignition turned on, but the car not running.
It takes 3mins if you have necessary equipment and gives you clear understanding of the nature of the problem. If it will show something a bit lower than 1.168V - your sensor and wiring is ok and you should check the software, if the reading is way off from the above mentioned value - either wiring is damaged or sensor is not working.
It is that easy and much more efficient than online brainstorming without sufficient input data.
It takes 3mins if you have necessary equipment and gives you clear understanding of the nature of the problem.
If it will show something a bit lower than 1.168V - your sensor and wiring is ok and you should check the software, if the reading is way off from the above mentioned value - either wiring is damaged or sensor is not working.It is that easy and much more efficient than online brainstorming without sufficient input data.
Yellow Wire - Manifold Differential Pressure Sensor - Pin #73 - voltage = .02
Black Wire - Sensor Ground - Pin #92 - voltage = .019
Grey Wire - Power +5volts - Pin #81 - voltage = 5
With 5 volts applied to the sensor (pin #81) the yellow wire coming from the sensor reads 4.4 volts
so what's that tell me?
Last edited by drb; Aug 6, 2011 at 10:07 PM.