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Ignition/Tuner/ECM/Fuel InjectionNeed advice on ignition issues? Questions about a tuner? Have questions about a EFI calibration or Fuel Injection? Tips on Engine Diagnostics, how to get codes, and what they mean. Find your answers here.
That is hit count or how many times each cell was sampled. The higher number the better. The red cells are good, the orange could be better and the green did not get a very good sample.
Taipan, you might want to try this out. Find some hilly areas, steeper the better. Concentrate on the lower rpms first, 1000-2000rpms. Use 3rd, 4th, and 5th gear to help keep the rpms down, and increase the load on the engine. Watch the screen when twisting the throttle so you get the feel of how much it takes to fill in the cell values. Save it, flash it, do it again until it is less than 5% change. Then move up to the next set of rpms, 2-3000, etc. Once you het the hang of it, things get easier. You can also use the brakes to help increase the load on the engine, use your judgement on this though. Hardest area for me was 4500 and up. Speed isn't important, getting higher loads on the engine are.
I got the first AT-TT session ( 20-25 minutes ) done as you laid out for me.. THANKS!
( PV Newbie questions coming )
178 cells learned 3%avg and 19% max... can you explain this tidbit for me?
here is the datalog pic... Looks like 7 hits is the magic number to get to the red as 6 hits is still orange....
Now I did 'scale' it ... when I compare the tunes... my VE tables are modified and Engine Displacment is set to 128.5 instead of 120CI.... is this because I scaled instead of capped? Also... the VE tables compared shows the AT-TT session leaned out ( looking at the numbers... lower numbers on AT session VE tables vs higher numbers on original Tune VE tables ) ... this is across the entire range of the tables. Is this also due to scaling?
I have this AT-TT loaded now.... whats the next step since I did the AT-TT session.... Just looking to gain knowledge on the 'right' way to ge this done with the most out of the sessions....
I assume I can keep doing small sessions, targeting key areas of the table at a time until I see little or no change.. then move on to a different area... correct?
Thanks!
Taipan, you might want to try this out. Find some hilly areas, steeper the better. Concentrate on the lower rpms first, 1000-2000rpms. Use 3rd, 4th, and 5th gear to help keep the rpms down, and increase the load on the engine. Watch the screen when twisting the throttle so you get the feel of how much it takes to fill in the cell values. Save it, flash it, do it again until it is less than 5% change. Then move up to the next set of rpms, 2-3000, etc. Once you het the hang of it, things get easier. You can also use the brakes to help increase the load on the engine, use your judgement on this though. Hardest area for me was 4500 and up. Speed isn't important, getting higher loads on the engine are.
That's exactly the kind of info I've been trying to find out! Many thanks.
Taipan, you might want to try this out. Find some hilly areas, steeper the better. Concentrate on the lower rpms first, 1000-2000rpms. Use 3rd, 4th, and 5th gear to help keep the rpms down, and increase the load on the engine. Watch the screen when twisting the throttle so you get the feel of how much it takes to fill in the cell values. Save it, flash it, do it again until it is less than 5% change. Then move up to the next set of rpms, 2-3000, etc. Once you het the hang of it, things get easier. You can also use the brakes to help increase the load on the engine, use your judgement on this though. Hardest area for me was 4500 and up. Speed isn't important, getting higher loads on the engine are.
Spazz- congrats on getting your first tuning run completed. the auto tune added up to 19% more fuel and an average of 3% increase across all tuned VEs. I think scale was the way to go- but I've never had to mess with that so not sure- I would strongly advise calling FM or DJ and talk to them about the scaling results and best way to proceed. If you call DJ ask for Roy. he is a sharp guy with the PV and TT. But you are on the road to a good tune- be sure to "export learned" and save it into a tune slot, then load that new tune file to the ECM and you'll be running with the new changes. from there you can run AT again and further tune it as needed. more than likely it is only going to take 2 or three tuning sessions at most. I had mine done in 2 tune sessions.
Spazz- congrats on getting your first tuning run completed. the auto tune added up to 19% more fuel and an average of 3% increase across all tuned VEs. I think scale was the way to go- but I've never had to mess with that so not sure- I would strongly advise calling FM or DJ and talk to them about the scaling results and best way to proceed. If you call DJ ask for Roy. he is a sharp guy with the PV and TT. But you are on the road to a good tune- be sure to "export learned" and save it into a tune slot, then load that new tune file to the ECM and you'll be running with the new changes. from there you can run AT again and further tune it as needed. more than likely it is only going to take 2 or three tuning sessions at most. I had mine done in 2 tune sessions.
Thanks for the explanation on the %... makes sense to me now. Since I I have the AT tune loaded, I no longer reset trims fom here on out from what I gathered from you.
I will continue sessions and Target key areas.. thanks. Ton!
normally, yes that is correct you no longer need to reset trims. But FM/Jamie or DJ may have different insight to your tune with scaling and I would again suggest you contact one of them to discuss.
You wil be fine if it scaled to 128ci, for future runs before you export learned scroll thru the screens using Mode button and check the VE tables. If you only have a few cells that are maxed at the 127.5 limit you are Ok and select Cap, however if you have a large region or cluster of cells at 127.5 you will either need to Scale or use the CDE table(s) to level the VE table out.
Also note its always good practice to reset learned trims, however when you flash the tune after an Auto Tune run there are no trims there regardless as PV resets them when you enter Auto Tune mode. Hoping in an upcoming firmware version to remove this step and have the PV take care of it automatically, we get way too many calls on that
You wil be fine if it scaled to 128ci, for future runs before you export learned scroll thru the screens using Mode button and check the VE tables. If you only have a few cells that are maxed at the 127.5 limit you are Ok and select Cap, however if you have a large region or cluster of cells at 127.5 you will either need to Scale or use the CDE table(s) to level the VE table out.
Also note its always good practice to reset learned trims, however when you flash the tune after an Auto Tune run there are no trims there regardless as PV resets them when you enter Auto Tune mode. Hoping in an upcoming firmware version to remove this step and have the PV take care of it automatically, we get way too many calls on that
Thanks For Chiming in! I appreciate it and save me a phone call!
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