Need some help- AutoTune isnt getting me anywhere close to the Target AF
09-03-2017, 05:14 PM
#1
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Need some help- AutoTune isnt getting me anywhere close to the Target AF
I have been trying for a few days but havent had much luck with the autotune yet. The car has been running almost off the charts lean!
These are my tables now- I dont know know why AutoTune is going nuts with that bottom row. I have changed it not to autotune below 850RPM
Here is the new log
https://app.box.com/s/wmuk1vlz8l956g0xkcanszmu4vmpa7za
Map File
https://app.box.com/s/sotguv2lsdq2nhknrjgd984u3z8xp31z
Car is a mostly stock 94 miata engine in a 7 Chassis.
Basically has an intake, exhaust and DIYPNP and no emissions stuff.
Any helps appreciated!
These are my tables now- I dont know know why AutoTune is going nuts with that bottom row. I have changed it not to autotune below 850RPM
Here is the new log
https://app.box.com/s/wmuk1vlz8l956g0xkcanszmu4vmpa7za
Map File
https://app.box.com/s/sotguv2lsdq2nhknrjgd984u3z8xp31z
Car is a mostly stock 94 miata engine in a 7 Chassis.
Basically has an intake, exhaust and DIYPNP and no emissions stuff.
Any helps appreciated!
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09-03-2017, 06:15 PM
#2
Cpt. Slow
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I tell it to ignore below 30kpa and below 1500rpm. Put your idle valve in test mode, set it to a really low idle, then about 850, and then about 1200. Tune those by hand. Set the 20 kpa row to ~55, make sure it reads full lean or close to it in over run, then leave it alone. If you're running lean everywhere, ctrl-A the table and multiply by ~1.05 until it's closer to your target AFRs*.
Other tips, if the cursor is hovering between two cells, either RPM or KPA, that are close together, like 28 and 35kpa, the VE numbers should be close too. You've got a few that are really far apart in the 850-1200 and 28-45kpa range.
BTW what injectors are you running?
*you should be targeting 14.5 at idle, 13.8 is needlessly lean.
P.S. Are you on Mazda comp mounts? They love a 900-1000 rpm idle, so if 850 is your target I'd up that for a little less vibration.
Other tips, if the cursor is hovering between two cells, either RPM or KPA, that are close together, like 28 and 35kpa, the VE numbers should be close too. You've got a few that are really far apart in the 850-1200 and 28-45kpa range.
BTW what injectors are you running?
*you should be targeting 14.5 at idle, 13.8 is needlessly lean.
P.S. Are you on Mazda comp mounts? They love a 900-1000 rpm idle, so if 850 is your target I'd up that for a little less vibration.
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09-03-2017, 08:00 PM
#3
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I tell it to ignore below 30kpa and below 1500rpm. Put your idle valve in test mode, set it to a really low idle, then about 850, and then about 1200. Tune those by hand. Set the 20 kpa row to ~55, make sure it reads full lean or close to it in over run, then leave it alone. If you're running lean everywhere, ctrl-A the table and multiply by ~1.i05 until it's closer to your target AFRs*.
Other tips, if the cursor is hovering between two cells, either RPM or KPA, that are close together, like 28 and 35kpa, the VE numbers should be close too. You've got a few that are really far apart in the 850-1200 and 28-45kpa range.
BTW what injectors are you running?
*you should be targeting 14.5 at idle, 13.8 is needlessly lean.
P.S. Are you on Mazda comp mounts? They love a 900-1000 rpm idle, so if 850 is your target I'd up that for a little less vibration.
Other tips, if the cursor is hovering between two cells, either RPM or KPA, that are close together, like 28 and 35kpa, the VE numbers should be close too. You've got a few that are really far apart in the 850-1200 and 28-45kpa range.
BTW what injectors are you running?
*you should be targeting 14.5 at idle, 13.8 is needlessly lean.
P.S. Are you on Mazda comp mounts? They love a 900-1000 rpm idle, so if 850 is your target I'd up that for a little less vibration.
The car idles well when warm. Needs a bit of work on the cold start but idles at 450 rpm very solidly when warm.
I haven't raised the idle mainly because I have such had heat problems that the lower the rpm the less heat I put into the car.
Is there something I am missing? I assume ve numbers increasing means adding fuel? I got some cells to 100 and haven't seen it change much on the af gauge. Just want to be sure I'm going the right direction.
I appreciate your reply! Definitely going to take the 20kpa out of auto tune!
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09-04-2017, 04:54 PM
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I had read both ways but most recently post I found said it can stay on. It is not going to work while on auto tune.
Turns out my big problem is a bad fpr and a pump was not pushing more than 40psi. It was an old external pump. I got an aeromotive unit but need some fittings to install it. The 255lph walbro pump is very nice this far.
Hopefully that's where the mystery ends! Will update this once I get the fpr in
Turns out my big problem is a bad fpr and a pump was not pushing more than 40psi. It was an old external pump. I got an aeromotive unit but need some fittings to install it. The 255lph walbro pump is very nice this far.
Hopefully that's where the mystery ends! Will update this once I get the fpr in
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09-04-2017, 05:10 PM
#7
Retired Mech Design Engr
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I had read both ways but most recently post I found said it can stay on. It is not going to work while on auto tune.
Turns out my big problem is a bad fpr and a pump was not pushing more than 40psi. It was an old external pump. I got an aeromotive unit but need some fittings to install it. The 255lph walbro pump is very nice this far.
Hopefully that's where the mystery ends! Will update this once I get the fpr in
Turns out my big problem is a bad fpr and a pump was not pushing more than 40psi. It was an old external pump. I got an aeromotive unit but need some fittings to install it. The 255lph walbro pump is very nice this far.
Hopefully that's where the mystery ends! Will update this once I get the fpr in
EDIT: Just remember to write the changes to Flash at the end of the session: "Save on ECU". If you were not "Update Controller", then click both "Apply" and "Save on ECU" (I think it used to be "Send" and "Burn".
Last edited by DNMakinson; 09-04-2017 at 05:21 PM.
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