sdveadjcomft
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sdveadjcomft [2009/06/15 07:07] dmertz |
sdveadjcomft [2009/12/28 12:42] twdorris |
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| A good understanding of [[v3combinedft|CombinedFT]] and [[fueltrimupdatepoints|fuel trim in general]] will help a lot with your understanding of this function. | A good understanding of [[v3combinedft|CombinedFT]] and [[fueltrimupdatepoints|fuel trim in general]] will help a lot with your understanding of this function. | ||
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| To use this tool, you need to capture some non-default data from your ECU while you drive around. | To use this tool, you need to capture some non-default data from your ECU while you drive around. | ||
| - | **Note:** As normally installed, first generation (not Gen 2 or MAFT Pro) MAF translators get their ground from ECU sensor ground via the Mitsubishi MAF connector and draw a moderate amount of current, particularly when powering the GM MAF sensor at higher airflow, so the pressure and temperature readings seen by the ECU will change a little if you later unplug the GM MAF or MAF translator, upsetting the VE table calibration. Changing the translator's ground from ECU sensor ground to chassis ground instead will eliminate this effect. Cut the MAF translator's ground wire between the translator box and the Mitsubishi MAF connector and connect the end of this wire coming from the translator to chassis ground. Leave the wire end that remains on the translators Mitsubishi MAF connector isolated and insulated. | + | **NOTE:** As normally installed, first generation (not Gen 2 or MAFT Pro) MAF translators get their ground from ECU sensor ground via the Mitsubishi MAF connector and draw a moderate amount of current, particularly when powering the GM MAF sensor at higher airflow, so the pressure and temperature readings seen by the ECU will change a little if you later unplug the GM MAF or MAF translator, upsetting the VE table calibration. Changing the translator's ground from ECU sensor ground to chassis ground instead will eliminate this effect. Cut the MAF translator's ground wire between the translator box and the Mitsubishi MAF connector and connect the end of this wire coming from the translator to chassis ground. Leave the wire end that remains on the translators Mitsubishi MAF connector isolated and insulated. |
| {{ http://www.ecmtuning.com/images/forums/sddata/sdmaploc.png}} | {{ http://www.ecmtuning.com/images/forums/sddata/sdmaploc.png}} | ||
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| The MAP sensor you want to log here is the one you have already configured in your **Manifold pressure (MAP)** field on the ECU Input tabs. An example of this is shown here. More details on configuring and installing this sensor can be found on the [[sdsetup|ECMLink - Speed Density Setup]] page. | The MAP sensor you want to log here is the one you have already configured in your **Manifold pressure (MAP)** field on the ECU Input tabs. An example of this is shown here. More details on configuring and installing this sensor can be found on the [[sdsetup|ECMLink - Speed Density Setup]] page. | ||
| - | When attempting to initialize the **SD VE Adjust (SDRatio)** tool, the application will check your ECU Input tab to locate the MAP sensor. It will then attempt to find this sensor in your datalog. Using the image above as an example, you would want to log the GM 3-bar sensor attached to the MDP input in order to use this function. | + | When attempting to initialize the **SD VE Adjust (CombinedFT)** tool, the application will check your ECU Input tab to locate the MAP sensor. It will then attempt to find this sensor in your datalog. Using the image above as an example, you would want to log the GM 3-bar sensor attached to the MDP input in order to use this function. |
| Once you're satisfied that the requirements above have been met, you're ready to grab a datalog. Let the car idle for about a minute. Then go drive. Try to keep the car in closed loop mode as much as possible (more on that in the advanced section). | Once you're satisfied that the requirements above have been met, you're ready to grab a datalog. Let the car idle for about a minute. Then go drive. Try to keep the car in closed loop mode as much as possible (more on that in the advanced section). | ||
sdveadjcomft.txt ยท Last modified: 2024/03/15 11:16 (external edit)
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