lower temps leaning out my fueling?
#1
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lower temps leaning out my fueling?
since my switch to hi-res, saturday i did 2 good logs and ran the ve analysis and my fueling was great, drove 60 miles here and there with my girl, everything seemed great. Today temps were 20 degrees lower and i was much leaner eveywhere under normal driving. now apparently i suck with this megasquirt but what could cause this?
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if the IAT fuel adjustments were too agressive then wouldnt that make it overly rich when it got colder? Colder air = more air molecules = more fuel needed. So, if it was over compensating, it should be rich. I may be off here but i think thats right.
#8
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well it's easy to see on your logs if enrichments were in use...look at the Gammae (total enrichments) or Gair (air temp enrichments) to see how much enrichments are there....if its rich and you see like 110 or something, your map is good but its adding too much fuel for some reason or another.
#12
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My Gammae sits at 100 almost all my logs after i reach 160*F (warmup), it dips up/down when EGO kicks in. and rises to 110-130 at idle when i start to heatsoak and start to see +20*F higher intake temps than ambient while cruising, I have AIT corrections turned on at idle to keep my AFR solid.
#13
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here's my map. i'm not really sure what i need to play with. i guess i'm stuck on the concept that if it's colder out it should richen up the mixture but for some reason it's leaning it out. at least that's the way i think it should work in my mind. today, a bit warmer out run and drives great.
anyway if one of you gurus could take a look at the map i've got in there right now and make any suggestions that would be great.
anyway if one of you gurus could take a look at the map i've got in there right now and make any suggestions that would be great.
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and here's the datalog i made just driving around to make the above ve table, i see gair and gego but i'm still confused on how to use them, i'm guess i gotta disable those things, let the car fully warm up past 160 and then redo my fuel map? if so how do i turn those things off?
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i thought it was i took the firmware image from the link in this thread and followed the instructions
https://www.miataturbo.net/forum/showthread.php?t=17901
i thought it was supposed to be already easythermed
https://www.miataturbo.net/forum/showthread.php?t=17901
i thought it was supposed to be already easythermed
#18
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Watch your Gair during that log...all your enrichments are intake air enrichments....i could see cooler temps leaning things out, you can see the enrichments kick into +120 when you near 3K, due to your air density correction map. From +50°F AIT you add fuel between idle and 3K.
For example, watch at 1938sec till 1972sec. You come to idle, where you are adding 33% more fuel (Gair) to see your 14.7ish idle. If the intake temps weren't as high (80*F) you'd be adding less, so leaner....
For example, watch at 1938sec till 1972sec. You come to idle, where you are adding 33% more fuel (Gair) to see your 14.7ish idle. If the intake temps weren't as high (80*F) you'd be adding less, so leaner....
#20
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go to clt related air density, i believe it's under advanced...
make everything below 80*F 100. I correct for heatsoak at idle. see if that helps. you'll probably need to retune the idle cells.
make everything below 80*F 100. I correct for heatsoak at idle. see if that helps. you'll probably need to retune the idle cells.