sdveadjcomft
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sdveadjcomft [2009/06/15 14:01] 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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| 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). | ||
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| ====== STEP 4: Run the Adjustment Tool ====== | ====== STEP 4: Run the Adjustment Tool ====== | ||
| - | When you're done, you right click in the graph area and select the **SD VE Adjust (SDRatio)** menu item. The application will then make a number of suggested changes to your SD VE table. You will definitely want to smooth and tweak this data a bit to make it "look nice". The application is just going to slap numbers into cells that it has data for. You'll need to extrapolate that data a bit to areas where you don't normally drive if you want to make the table work well in unexpected conditions. | + | When you're done, you right click in the graph area and select the **SD VE Adjust (CombinedFT)** menu item. The application will then make a number of suggested changes to your SD VE table. You will definitely want to smooth and tweak this data a bit to make it "look nice". The application is just going to slap numbers into cells that it has data for. You'll need to extrapolate that data a bit to areas where you don't normally drive if you want to make the table work well in unexpected conditions. |
| **NOTE:** You're basically changing the very data long term fuel trim was previously based on. So if you're making fairly large changes to MAF compensation, you should consider resetting the long term fuel trim values using the "Reset fuel trims" menu item in the ECU menu. | **NOTE:** You're basically changing the very data long term fuel trim was previously based on. So if you're making fairly large changes to MAF compensation, you should consider resetting the long term fuel trim values using the "Reset fuel trims" menu item in the ECU menu. | ||
sdveadjcomft.txt ยท Last modified: 2024/03/15 11:16 (external edit)
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