v3mafadjcombft
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v3mafadjcombft [2009/02/26 14:23] twdorris |
v3mafadjcombft [2009/06/02 09:24] twdorris |
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| - | ====== MAF Adj: CombinedFT ====== | + | ====== MAFComp Adjust (CombinedFT) ====== |
| **NOTE:** Make sure you're running the latest version of the [[v3changelog|laptop application]]. We are constantly improving and tweaking this function to get better results as more users are posting example files. | **NOTE:** Make sure you're running the latest version of the [[v3changelog|laptop application]]. We are constantly improving and tweaking this function to get better results as more users are posting example files. | ||
| - | The **MAF Adj: CombinedFT** menu item is one of several tools you can use to help "dial in" your airflow settings. This particular item maps out and averages [[v3combinedft|CombinedFT]] over a range of closed loop driving conditions to produce a set of adjustments to the current MAF compensation table. It's basically letting the ECU track how much adjustment it needs under various conditions and then moves that adjustment into the MAF compensation table. | + | The **MAFComp Adjust (CombinedFT)** menu item is one of several tools you can use to help "dial in" your airflow settings. This particular item maps out and averages [[v3combinedft|CombinedFT]] over a range of closed loop driving conditions to produce a set of adjustments to the current MAF compensation table. It's basically letting the ECU track how much adjustment it needs under various conditions and then moves that adjustment into the MAF compensation table. |
| This function probably helps most with a GM MAF setup run straight to the ECU using ECMLink's GM MAF integration option. That particular configuration produces a pretty large number of MAF sample points for fairly typical driving conditions (easily ranging from 500hz to 2000hz for simple idle and cruise conditions). So having a tool which helps establish a decent starting point can be very handy here. | This function probably helps most with a GM MAF setup run straight to the ECU using ECMLink's GM MAF integration option. That particular configuration produces a pretty large number of MAF sample points for fairly typical driving conditions (easily ranging from 500hz to 2000hz for simple idle and cruise conditions). So having a tool which helps establish a decent starting point can be very handy here. | ||
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| 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 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). | ||
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| ===== Basic Usage ===== | ===== Basic Usage ===== | ||
| - | 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). When you're done, you can click on the "MAF Adj: CombinedFT" 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. | + | 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). When you're done, stop the log and click on the "MAF Adj: 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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