momentary lean dip at small throttle changes

s300 and SManager software questions & answers
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BIGDUMBGOOF
Posts: 2
Joined: Mon Mar 28, 2016 4:26 pm

momentary lean dip at small throttle changes

Post by BIGDUMBGOOF » Mon Mar 28, 2016 5:03 pm

hello everyone,

i get a momentary lean condition while increasing throttle position.
example lets say i'm cruising at 500mbar at 14.5afr @ 10% tps,
when i give it +-20-50%tps it goes to lets say 800mbar and the afrs gets to 16.0-16.5 for a second, and after that second it goes back to the afr's i tuned it to,(14.0 afr)
i tried increasing tip in up to 55% (but it didnt help the lean spot, just made it richer for a second at WOT,
when i give it full throttle i dont get this lean dip,
what could it be?
i also noticed that while cruising at very low throttle position (1%-2%-3%) afrs gets rich 13.5-13.8afr and it seems that what ever i take off the maps wond help this rich spot,


setup is:
s300v3
id1000 at 43psi no vac
gm 3 bar,
stock throttle size.

i attached the map now but i will have a datalog in a few days, (my wideband offset is too high and i need to sort it out)
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BIGDUMBGOOF
Posts: 2
Joined: Mon Mar 28, 2016 4:26 pm

Re: momentary lean dip at small throttle changes

Post by BIGDUMBGOOF » Tue Mar 29, 2016 9:06 am

Forgot to mention, (no exhaust leaks ,no vac leaks ,no cels. iat and ect stay constant)
thanks

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Spunkster
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Re: momentary lean dip at small throttle changes

Post by Spunkster » Tue Mar 29, 2016 5:00 pm

Post a datalog showing the issue.

Johnny_9
Posts: 312
Joined: Sun Apr 09, 2006 5:12 am

Re: momentary lean dip at small throttle changes

Post by Johnny_9 » Sun May 01, 2016 6:45 am

Does the next S300 version need tip-in fuel enrichment by RPM?

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