v3mafadjcombft
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v3mafadjcombft [2009/06/11 14:09] twdorris |
v3mafadjcombft [2009/06/11 14:16] twdorris |
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| You absolutely MUST make sure your fuel settings are already appropriate for your injector size, fuel type and base fuel pressure. If there is any deviation here, then the adjustments to airflow suggested by this function will simply include those fuel corrections as well! This can create a really confusing configuration if you aren't careful. So please review your [[baseinjectordata|global fuel and deadtime settings]] first to make sure they are at least somewhat reasonable for your setup. | You absolutely MUST make sure your fuel settings are already appropriate for your injector size, fuel type and base fuel pressure. If there is any deviation here, then the adjustments to airflow suggested by this function will simply include those fuel corrections as well! This can create a really confusing configuration if you aren't careful. So please review your [[baseinjectordata|global fuel and deadtime settings]] first to make sure they are at least somewhat reasonable for your setup. | ||
| - | ====== STEP 2: Check For Close Loop Operation ====== | + | |
| + | ====== STEP 2: Check For Closed Loop Operation ====== | ||
| Make sure the car is able to run in closed loop mode. Look for a cycling FrontO2 sensor and a "1" in the ClosedLoop log item. It doesn't have to be running with fuel trims near 0% (that's the purpose of using this function after all). But it does need to at least cycle in closed loop mode on its own. If it does not, you need to make some manual adjustments first to at least get it running in closed loop. | Make sure the car is able to run in closed loop mode. Look for a cycling FrontO2 sensor and a "1" in the ClosedLoop log item. It doesn't have to be running with fuel trims near 0% (that's the purpose of using this function after all). But it does need to at least cycle in closed loop mode on its own. If it does not, you need to make some manual adjustments first to at least get it running in closed loop. | ||
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| 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 · Last modified: 2024/03/15 11:16 (external edit)
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