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Tuning MAF in Open Loop ?

for those of you who has the experience in tuning. I'm trying to fine tune the MAF at idle/cruising Would it be better to tune the MAF in Open loop

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Old 08-28-2011, 11:31 AM   #1 (permalink)
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Default Tuning MAF in Open Loop ?

for those of you who has the experience in tuning.

I'm trying to fine tune the MAF at idle/cruising

Would it be better to tune the MAF in Open loop ?
because right now my AFR fluctuate from 14 to 15 Afr at idle and the compensation are within 95-105 ..

I have read that the O2 sensor should do that in 1 sec but mine takes 3.7 sec from peak to peak .


so now I'm guessing my OEM 02 Sensor are getting too slow ?!?!

disregard the LC1 log at 20.8afr , I just installed everything with the LC1 and computer to make sure everything work and log correctly.
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Old 09-01-2011, 04:04 PM   #2 (permalink)
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I don't know if this is relevant but when I was at Performance Motorsports they told me that they don't mess with the idle tune... it is always rich and irrelevant I guess.

What are you really going to gain?
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Old 09-01-2011, 05:25 PM   #3 (permalink)
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I don't know if this is relevant but when I was at Performance Motorsports they told me that they don't mess with the idle tune... it is always rich and irrelevant I guess.

What are you really going to gain?
since the fluctuation was up to 1.5afr up or down . I tried to isolate the possible problem.
but even in Open loop with my wideband still see some fluctuation of about half of what I was getting..

to answer your question ; Im trying to get a more stable MAF tune because my whole CAI is custom made. (maf tube included)
dealing with te K-fuel / MAF table isnt an easy job.

at first I thought my K-fuel wasnt alright , which seemed to be one of the problem .I still suspect my OEM AFR wideband to get sluggish from the finding I have done ...
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Old 09-01-2011, 05:44 PM   #4 (permalink)
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Have you logged the MAF signal at idle to see if it is getting a smooth reading?
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Old 09-01-2011, 07:08 PM   #5 (permalink)
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Have you logged the MAF signal at idle to see if it is getting a smooth reading?
yeep , there isnt any problem there.
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