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TOPIC: Nash Flash, PCV and Autotune

Nash Flash, PCV and Autotune 1 year 1 month ago #1

Ok guys, have a few thoughts Id like comments on and some help finding info.

(Disclaimer) I bought my bike used and the autotune was already installed with a good map in the PCV. Other than checking to ensure the ground was good and the TPS signal was rock solid (after tps harness recall) Ive not used or messed with the PCV and never touched the autotune because the bike ran great.

Just got the ECU Flashed with Tims program and Reinstalled. Bike starts and idles fine but thats all I could do today. When clearing code 50, I also noticed code 17. I havent found that anywhere yet. HOping it isnt something serious.

Ive looked for help on the site with Autotune and see tons of refs to FXSteins posts about it but hit ERROR 404 on all the links. Anyone know where its kept or where it went? Still available?

I think Tim suggested that once i had his flash, I could use autotune to make small refinements to accomodate my specific bike. Id also need to zero out the PCV map that is in the bike now, as I dont really want that altering what Tim has already done correct? How do I do that exactly? Highlight all the numbers and hit "0" or "delete" or? Im guessing i can figure it out once I have time to hook into it while running (no time tonight) but figured Id ask before I go pushing buttons.

was also hoping I could ask the questions after I read up on things but I keep hitting a lot of 404 Error codes when searching.

any help is appreciated.

Thanks
Jeff
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Re: Nash Flash, PCV and Autotune 1 year 1 month ago #2

Error code 17 is for the EXUP. If you have that error code, you may have an old code or you ordered a Stock flash. The stock flash still has the EXUP codes functional and I open the EXUP all the time. If you ordered a different re-flash, the error should clear when you reset it. If it does not clear when reset, the EXUP moved to an odd position, so it would be best to un-plug and remove it.

You should start with a zero map and work from there with your autotune. Open the PCV software and connect to your PCV. Select "Get Map". When it is displayed, select a single table cell at random and depress Ctrl + A (for novice PC users, that means depressing the Ctrl Key and the letter A at the same time). This will select all cells and type "0". The click "Send Map". You are good to go.
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Re: Nash Flash, PCV and Autotune 1 year 1 month ago #3

why2kmax wrote:
When clearing code 50, I also noticed code 17. I havent found that anywhere yet. HOping it isnt something serious.

I think Tim suggested that once i had his flash, I could use autotune to make small refinements to accomodate my specific bike. Id also need to zero out the PCV map that is in the bike now, as I dont really want that altering what Tim has already done correct? How do I do that exactly? Highlight all the numbers and hit "0" or "delete" or? Im guessing i can figure it out once I have time to hook into it while running (no time tonight) but figured Id ask before I go pushing buttons.

Thanks
Jeff

Hi Jeff,

Error code 17 is just the code for EX-UP being disconnected (open circuit). This might be just something from before when you disconnected the EX-UP.
Tim disables the EX-UP so once you clear the codes it shouldn't be back. If it is he left EX-UP enabled and the ECU is still reporting a fault code

Yes, you need to zero out your entire map.
You can just enter "0" in all the throttle % from 0% to 100%.
Then copy that row to all other rpm increments of 500 or 250 what ever your PC V is set at.
I would disable AutoTune if I were you in the config settings of PC V.
You can leave it connected, but just disable it for now.
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Re: Nash Flash, PCV and Autotune 1 year 1 month ago #4

Jeff I have used the Auto Tune module quite a bit, early on with my bike. It can be a decent tool, but needs to be used correctly and can at times be a PITA.

My first question for you is what Re-Flash did you get and how close does it match the hardware on your bike? If it is a tune done for your setup.....I would just 0 out the map (it's done as you described) and ride the bike for a while.

If you are dead set on the "perfect tune", then a few of pulls on the dyno ($50-$75) to have the AFR checked across the board will give you an idea of where you are. I would recommend that, before diving into the Auto Tun Module as it can be difficult to work with a times, and may not be necessary.

I'll be happy to answer any questions on the module for you.....it would take more time then I have tonight to give you a good useful summary.

Mark
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Re: Nash Flash, PCV and Autotune 1 year 1 month ago #5

ITGOES: well im not dead set on the perfect tune but was hoping to learn how to use it and refine if I could, as long as it is not rocket science but kept finding errors when looking for the early discussions when you guys were figuring out how to work the autotune. I pretty much understand most of the how it works part, what Im short on is experience with the interface and what Im doing in the screens and how what sections of the software do what. My bike has X-pipe with stock cans, AIS removed, and monster Air kit. I got Tims 4-1-2 xpipe/monster air tune which should be darn close to where I want to be.

Thanks for the code 17 info. I figured it was a previous code and just wanted reassurance it was something minor.

Tim, thanks for the flash and all your hard work that went into it. Appreciate you being here and your willingness to answer questions and help us all out, cant wait to ride it.

Jeff
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Re: Nash Flash, PCV and Autotune 1 year 1 month ago #6

well im not dead set on the perfect tune but was hoping to learn how to use it and refine if I could, as long as it is not rocket science but kept finding errors when looking for the early discussions when you guys were figuring out how to work the autotune. I pretty much understand most of the how it works part, what Im short on is experience with the interface and what Im doing in the screens and how what sections of the software do what. My bike has X-pipe with stock cans, AIS removed, and monster Air kit. I got Tims 4-1-2 xpipe/monster air tune which should be darn close to where I want to be.

If you are willing to experiment a little, it's not difficult to get started.

I would recommend:

Make sure your PCV is installed properly with the digital ground mod, and the TPS is calibrated.
Install a switch in a convenient place (I put mine under my flip up portion of the seat) so that you can enable and disable the AutoTune module.
Make sure you have the latest version of Power Commander Software on your PC and flashed to the PCV.

In the AutoTune the target AFRs should be 14.7 anywhere below 20% throttle and 13.2% everywhere else.
I would put 0's in the 2% throttle column, this can be a tricky area to adjust, if you put 0's there no adjustments will be made.
Make sure the bike is warmed up before you enable the AutoTune.
Ride the bike as you normally would I would discourage things like; downshift engine braking, blipping the throttle......anything that might confuse the software. Keep in mind what it's looking at, RPM, throttle opening and the AFR based on the oxygen sensor.

After a ride or 2 you can look at the AutoTune table that the software created. The positive and negative numbers you see in the cells will indicate where it feels fuel should be added or subtracted.
If your tune is good those number should be very small. Anything smaller than 5 is really not that significant.

You'll then have the choice to save the changes or delete them. To fine tune the map you would want to save them and then repeat the process several times until you are seeing mostly 0's after a ride.

That's about all I can think of off the top of my head to get you started.

Give it a try.....and good luck. If you have any questions feel free to ask.

Mark
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Re: Nash Flash, PCV and Autotune 1 year 1 month ago #7

itgoes wrote:
I would discourage things like; downshift engine braking, blipping the throttle......anything that might confuse the software. Keep in mind what it's looking at, RPM, throttle opening and the AFR based on the oxygen sensor.

+ 1. I can't stress this enough. Autotune doesn't do too well with deceleration (when you cut fuel). It sends the unit into a frenzy. When you close the throttle it creates a lean condition as you've cut fuel and the autotune tries to adjust the map for that lean condition and messes up your good work.

So I would add to Mark's recommendation and go as far as clutching in once you're decelerating while tuning.
This will hopefully record the right figures on acceleration and not mess them up on decel.
HopevI didn't confuse the heck out of you.
Good luck.
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Re: Nash Flash, PCV and Autotune 1 year 1 month ago #8

Well, to get a bit on the Techy Side....

Tim mentioned it sometime ago, the AIS-Valve is only activated during Decel.

That would give us the Option to piggyback a seperate Relay on this Circuit. When the AIS-Valve gets Voltage through the System, the Coil would be energized. Then, use a normally closed Contact on our Relay to switch Autotune OFF during Decel. Add a second Switch in Series to generally Activate/Deactivate Autotune and the updated automatic Autotune-System is ready to produce.

That said, i'd like to express this again, as it's not advertised by Dyno, Autotune is producing the Correction Tables as a Byproduct.

The Main Function of Auto-Tune is TO REGULATE EFI-Timing on the Fly. It does this very good at a very respectable Sample Rate.

That means, you can set the Target Maps at the AFR you want to see, activate Auto-Tune and ride on ... You never have to accept the Correction Table as long as you allow enough positive and negative Range in the Auto-Tune Configuration .
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Last Edit: 1 year 1 month ago by Squeeze.
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Re: Nash Flash, PCV and Autotune 1 year 1 month ago #9

Ok Im getting it. Clarification questions:

Squeeze, when you say: "You never have to accept the Correction Table as long as you allow enough positive and negative Range in the Auto-Tune Configuration ."


Is setting the target AFR like Mark suggested in a previous post (target AFRs 14.7 below 20% throttle and 13.2% everywhere else) is THAT what you mean by "enough positive-neg range" (14.7-13.2%)

OR (what I think) that you set the target AFRs as mark said (14.7/13.2) and then there is another section or variable to set the range that you will allow the Autotune to move within +/- X amount away from those targets?

Like set range at .5 (giving a possible 14.2-15.2% for the set target of 14.7%
OR does a "5" in the tables mean .5 therefore if I set the range at "5" then it will move 14.2-15.2
I certainly DONT want it moving 9.7-19.7%

OR do you set a floor and a ceiling for the target. Target 14.7% with 14.0% bottom and 15.0% top.

so then my next question is what have you all found to be a good range to allow that to move around in?

and finally do you set it for each target number or just in ONE spot and it allows that movement for all the targets

maybe this is all obvious when I hook back into the PCV and look at the Autotune myself (I dont recall all what was in there or how the interface was) Im just trying to answer as many questions as possible first so that I dont end up getting halfway through it and have to come running back here to say HEy I did this but what now. and then Im still afraid to ride or waiting a day for an answer.

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Jeff
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Re: Nash Flash, PCV and Autotune 1 year 1 month ago #10

Jeff I believe he is talking about the limit you can set on the correction....in other words how much up or down you allow the AutoTune to adjust while it's active. There is a setting for that. It's a fuel percentage increase/decrease limit, not a target AFR adjustment.....(though obviously related to the AFR set for that area).

I would think the numbers you will see will be so small that it won't be an issue....but you can just increase the range if you want.
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