fluctuation in afr's log included
#1
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Hi yall, been tuning with tunerstudio for over 6 months cant get rid of this afr fluctuation, going turbo soon and would like it gone before i do, what settings would cause this? Thanks
setup: brain built ms3x 1990 miata aem uego
update: added tune to my post
setup: brain built ms3x 1990 miata aem uego
update: added tune to my post
Last edited by nwNAMiata; 12-30-2012 at 11:55 PM. Reason: added tune
#6
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I'm assuming the aem uego is calibrated and setup correctly.
Look at tps accel and gego in your log. There are accel flags everywhere followed by gego compensating at only 4 ignition events per step.
You could try going for a drive with 100% map based ae and mapdot threshold of 50-80kpa/s for comparison.
Perhaps someone with good tps and eae settings will chime in.
![](https://www.miataturbo.net/attachments/megasquirt-18/63276-fluctuation-afrs-log-included-graph4g.png?dateline=1356964655)
![](https://www.miataturbo.net/attachments/megasquirt-18/63278-fluctuation-afrs-log-included-graphar.png?dateline=1356964655)
The lean throttle tip in from idle gets no correction since gego is inactive below 1500 rpms.
![](https://www.miataturbo.net/attachments/megasquirt-18/63279-fluctuation-afrs-log-included-graph3j.png?dateline=1356964655)
Also, Do you have a colder than stock thermostat? The car stays in warmup mode for most of the log since wue ends at ~188 F.
Look at tps accel and gego in your log. There are accel flags everywhere followed by gego compensating at only 4 ignition events per step.
You could try going for a drive with 100% map based ae and mapdot threshold of 50-80kpa/s for comparison.
Perhaps someone with good tps and eae settings will chime in.
![](https://www.miataturbo.net/attachments/megasquirt-18/63276-fluctuation-afrs-log-included-graph4g.png?dateline=1356964655)
![](https://www.miataturbo.net/attachments/megasquirt-18/63278-fluctuation-afrs-log-included-graphar.png?dateline=1356964655)
The lean throttle tip in from idle gets no correction since gego is inactive below 1500 rpms.
![](https://www.miataturbo.net/attachments/megasquirt-18/63279-fluctuation-afrs-log-included-graph3j.png?dateline=1356964655)
Also, Do you have a colder than stock thermostat? The car stays in warmup mode for most of the log since wue ends at ~188 F.
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