Hi,
finished my MS-2 installation yesterday. After a bit of fiddling it started and since then I managed to tune the cold and hot start behaviour and parts of the VE tables using AMC. The funny thing about this is that the changes in VE-table 1 are bigger than in VE-table2.
In parts where a lot of driving is done the values are similar but more extreme point that I reach by driving against the brakes for a few seconds are changed a lot more in VE-Table1.
Are the update times / vertex / min VE change etc. seperate for both tables? If so where can I change the values for table 2?
William
Westfield with a 3.9 Rover V8, MS-II V 2.685, MT2.25, V3.0 board, EDIS-8, 2x innovate LC-1
Dual Table automatic mixture control
Forum rules
Read the manual to see if your question is answered there before posting. If you have questions about MS1/Extra or MS2/Extra or other non-B&G code configuration or tuning, please post them at http://www.msextra.com The full forum rules are here: Forum Rules, be sure to read them all regularly.
Read the manual to see if your question is answered there before posting. If you have questions about MS1/Extra or MS2/Extra or other non-B&G code configuration or tuning, please post them at http://www.msextra.com The full forum rules are here: Forum Rules, be sure to read them all regularly.
The AMC is not really meant to tune starting. You should only use this after you have rough tuned everything and you are at normal operating temperature. The VE table corrects for the air flow of your engine at different rpms and maps; there are separate priming, cranking, after start and warmup enrichments to handle these conditions.
As far as the dual table, it looks like you are using 2 ego sensors, one for each injector bank. In this case there are two reasons the VE1 and VE2 table might come out different. The AFR1 and AFR2 tables are different or the EGO1 and EGO2 readings are different. Some of it could also be caused by running AMC during startup/warmup where things are very transient. So what I would do is check the two AFR tables are identical, get the car warmed up fully, then turn on the AMC and if the VE tables are still different monitor the two ego readings. If they are different, swap the sensors and see if the difference follows the sensor or if it follows the bank. One means one or both sensors are out of calibration, the other means there may be an air/ fuel flow imbalance in the engine. If the egos are read the same and the afr tables are the same, then we will have to look at things further.
As far as the AMC parameters - they are the same for both banks. However, I found that the ve change parameter was never really implemented, so don't worry if nothing different happens when you change the delta_ve. I have this fixed in a future version, but all it means for now is that the AMC will update things based on time only. To slow down the rate just increase the time between updates.
As far as the dual table, it looks like you are using 2 ego sensors, one for each injector bank. In this case there are two reasons the VE1 and VE2 table might come out different. The AFR1 and AFR2 tables are different or the EGO1 and EGO2 readings are different. Some of it could also be caused by running AMC during startup/warmup where things are very transient. So what I would do is check the two AFR tables are identical, get the car warmed up fully, then turn on the AMC and if the VE tables are still different monitor the two ego readings. If they are different, swap the sensors and see if the difference follows the sensor or if it follows the bank. One means one or both sensors are out of calibration, the other means there may be an air/ fuel flow imbalance in the engine. If the egos are read the same and the afr tables are the same, then we will have to look at things further.
As far as the AMC parameters - they are the same for both banks. However, I found that the ve change parameter was never really implemented, so don't worry if nothing different happens when you change the delta_ve. I have this fixed in a future version, but all it means for now is that the AMC will update things based on time only. To slow down the rate just increase the time between updates.
Hi,
I didn't use it during starting. Just when driving fully warmed up. I had a look at the AFR readings and they look the same. The changes made to both VE tables are also the same. It only seems to take quite a bit longer to get things changing in VE table 2 and I wanted to know if the parameters for both are the same.
I will do some longer drives when I'm back from holiday.
thanks,
William
I didn't use it during starting. Just when driving fully warmed up. I had a look at the AFR readings and they look the same. The changes made to both VE tables are also the same. It only seems to take quite a bit longer to get things changing in VE table 2 and I wanted to know if the parameters for both are the same.
I will do some longer drives when I'm back from holiday.
thanks,
William