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Old 11-09-2008, 06:38 PM   #21
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So i recalibrated the lc1 and it got a LITTLE better. Without any editing the AFR was no longer pegged at 7.4 and went up to about 7.6-7.8. I changed the fuel required and was able to get it to idle at about 9.5-10. When i rev it and it gets anywhere near the proper AFR the car begins to idle bad and die quietly.

The gas smell is overwhelming.
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Old 11-09-2008, 06:56 PM   #22
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Frustration leve, lol. Mine's like infinity/zero right now....


Did you recalbrate with it in the exhaust after sitting or did you remove it? I'd try removing it just to be damn sure. Sounds like it's off to me. What does the gauge for your wideband read vs. what megatune says? If your gauge reads reasonable numbers and MS doesn't, this is a software issue not a calibration issue.

Do you have the LC-1's output setup? IE-did you go into LM programmer and set it up? It's like 0-5V 10-20 AFR or something like that. Just make sure you do the same settings there that you do in megatune.
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Old 11-09-2008, 07:13 PM   #23
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Frustration leve, lol. Mine's like infinity/zero right now....


Did you recalbrate with it in the exhaust after sitting or did you remove it? I'd try removing it just to be damn sure. Sounds like it's off to me. What does the gauge for your wideband read vs. what megatune says? If your gauge reads reasonable numbers and MS doesn't, this is a software issue not a calibration issue.

Do you have the LC-1's output setup? IE-did you go into LM programmer and set it up? It's like 0-5V 10-20 AFR or something like that. Just make sure you do the same settings there that you do in megatune.
Waiting for the exhaust to cool before i take it out. The gauge and MS are dead on. I did not personally program the LC1 but since the gauge and MS are in spec i do not see as that being a problem.
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Old 11-09-2008, 07:19 PM   #24
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Waiting for the exhaust to cool before i take it out. The gauge and MS are dead on. I did not personally program the LC1 but since the gauge and MS are in spec i do not see as that being a problem.
If the are dead on with each other I would lean the idle out. My AEM only reads down to 10 AFR, I was pegged on ten. I had to lean idle out considerably.
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Old 11-09-2008, 07:47 PM   #25
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WOOT! i just recalibrate it in free air and i think that solved a few problems. im fighting the fuel tables right now to get it to idle currently but im at 12.5 and its nice and steady.
The only problem now is if i rev it slowly it would lean out and die.
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Old 11-09-2008, 08:19 PM   #26
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Ok, now im pretty mad. There is no way i can lean it out without it dying. When i slowly decrease the VE it would lean out, but its never steady. Its like once it gets to 14 i just keeps going slowly all the way to 22.4 which it then shuts down.

Im getting tired of this. Thinking of selling this pos and just buying a car where a tune involves plugging in a obd2 wire and press 1 button.
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Old 11-09-2008, 08:24 PM   #27
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MS can be one hell of a headache at times. Believe me.

I STILL don't think you have the LC-1 programmed correctly. For one, if you had it 0-5V 10:20 AFR, then it wouldn't spit out a 7:1 or 22.4:1 AFR in the first place. So backup and read about programing the LC-1 and do that.
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Old 11-09-2008, 08:31 PM   #28
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MS can be one hell of a headache at times. Believe me.

I STILL don't think you have the LC-1 programmed correctly. For one, if you had it 0-5V 10:20 AFR, then it wouldn't spit out a 7:1 or 22.4:1 AFR in the first place. So backup and read about programing the LC-1 and do that.
I have it set to LC1 default 0-5v .5-1.5 lambda.
Here is what joe told me.
Ok, you've got an LC1 wideband sensor, set to the default of 0v = .5λ and 5v = 1.5λ. If you do the math, 0.5λ with gasoline is 7.35:1, and 1.5λ is about 22.1. So all you should need to do is go into MegaTune Configurator (which can be launched from the start menu or from within Megatune) and set it up for the LC-1 default.
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Old 11-09-2008, 08:42 PM   #29
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Did you set it up in LM Programmer? Yes or no.
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Old 11-09-2008, 09:26 PM   #30
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No i did not set it up in LM, but i think i found my problem. I think i have read more on the MS boards than i have in my last 2 years of college. Good thing too because i found this gem. https://www.miataturbo.net/forum/t26149/
Mine was on as well. As i turned it off, i was able to lower my VE tables by a factor of about .9. This gave me the idle that is in AFR table as 13.3.
I was actually able to drive the car! Now i have fine tuning to go, but at least now my urge to sell the car has diminished.

Im including a new log file of my very short run. There is 2 points that concern me, they begin at about record 940. My AFR goes max lean while my PW goes to 0. What could explain this?

Thank you pat for all your help, if you were here, id pour you a shot.
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File Type: xls datalog200811091708.xls (335.9 KB, 39 views)

Last edited by jobambo; 11-09-2008 at 09:37 PM.
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