v3mafadjcombft
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v3mafadjcombft [2009/06/11 14:11] twdorris |
v3mafadjcombft [2009/08/05 05:58] 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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| ====== STEP 3: Data Capture ====== | ====== STEP 3: Data Capture ====== | ||
| Add the following log items to your captured values (F10): CombinedFT, MAFRaw and ClosedLoop | Add the following log items to your captured values (F10): CombinedFT, MAFRaw and ClosedLoop | ||
| - | Make sure the engine is at full operating temperatures. You don't want to mess with coolant based variations at this point. You want to stabilize everything you can first and then adjust based on the one variable left (presumably airflow variation). | + | Make sure the engine is at full operating temperature. You don't want to mess with coolant based variations at this point. You want to stabilize everything you can first and then adjust based on the one variable left (presumably airflow variation). |
| 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, stop the log and click on the "MAFComp Adjust (CombinedFT)" menu item (right click in the graph window to get this menu item) to see what the application comes up with. Review this, smooth the points as you'd like, extend the points to cover areas where you did not collect data and then hit "Save to ECU" when you're done. | + | When you're done, stop the log and click on the **MAFComp Adjust (CombinedFT)** menu item (right click in the graph window to get this menu item) to see what the application comes up with. Review this, smooth the points as you'd like, extend the points to cover areas where you did not collect data and then hit "Save to ECU" when you're done. |
| **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. | ||
v3mafadjcombft.txt ยท Last modified: 2024/03/15 11:16 (external edit)
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