1st tuning experience
#21
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Setting the frequency to 0 effectively disables the MAF and should put you in SD mode (SES lights and all, unless you disabled them too).
You would only leave the fail frequency at 0 if you intended to run an SD tune and not turn the MAF back on and calibrate it for the new SD/VE tune.
Cheers,
Rob (Bad30th)
You would only leave the fail frequency at 0 if you intended to run an SD tune and not turn the MAF back on and calibrate it for the new SD/VE tune.
Cheers,
Rob (Bad30th)
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Setting the high fail frequency = 0 will fail the MAF when it reports any frequency greater than 0. Setting the high fail limit to 1 means the PCM will fall into SD mode the first time the high fail frequency is exceeded.
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I read thru the thread quickly but here's what I see as your issue. (I didn't see anyone else specifically address your problem.)
MAF Fail = 0 is SD. SD uses the secondary VE table. You need to copy the appropriate rows from your modified primary table to the secondary table to see any effect. Do that and you should see better fuel trims. Now log, change primary and secondary tables again, log more... repeat until you're satisfied or bored.
Then reset MAF Fail Freq to re-enable MAF and go thru the MAF tuning procedure until you like the fuel trims again.
MAF Fail = 0 is SD. SD uses the secondary VE table. You need to copy the appropriate rows from your modified primary table to the secondary table to see any effect. Do that and you should see better fuel trims. Now log, change primary and secondary tables again, log more... repeat until you're satisfied or bored.
Then reset MAF Fail Freq to re-enable MAF and go thru the MAF tuning procedure until you like the fuel trims again.