AFRleans under boost after 7000 rpm , Please help , i cant figure this out !!!

s300 and SManager software questions & answers
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payam_fox
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AFRleans under boost after 7000 rpm , Please help , i cant figure this out !!!

Post by payam_fox » Mon Jun 17, 2019 9:15 pm

hello , i have a b16 turbo with low comp pistons , we did dyno tuning before it was great and now i changed some parts like turbo , AEM fuel pressure regulator , and i had to re tune it , i started tuning in on street like before , and everything is fine except when i floor it afte 7 psi around 7 and 8 k rpm in one of the columns read really lean , its like car hesitates for half a sec , ive tried to give it a lots of fuel to be not lean but still same rpm same columns is lean , does anyone had this problem before '? by the way i have tried oem fuel pressure regulator its same


i have high pressure fuel rail , 1000 injectors , walbro pump everything is built on the car

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Spunkster
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Re: AFRleans under boost after 7000 rpm , Please help , i cant figure this out !!!

Post by Spunkster » Tue Jun 18, 2019 9:23 am

Without the calibration and a Datalog showing the issue it is hard to say what it might be.

payam_fox
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Re: AFRleans under boost after 7000 rpm , Please help , i cant figure this out !!!

Post by payam_fox » Tue Jun 18, 2019 5:50 pm

here is the datalog atached for one pull , ill try to do another one
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33.s3d
(207.8 KiB) Downloaded 21 times

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Re: AFRleans under boost after 7000 rpm , Please help , i cant figure this out !!!

Post by Spunkster » Wed Jun 19, 2019 9:02 am

You need to post the calibration as well.

payam_fox
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Re: AFRleans under boost after 7000 rpm , Please help , i cant figure this out !!!

Post by payam_fox » Thu Jun 20, 2019 10:45 am

here i have attached the calibration too , as you can see in vtec fuel table i gave a lots of fuel to help it but still reads lean on those spots
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fuckkkk.skl
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Re: AFRleans under boost after 7000 rpm , Please help , i cant figure this out !!!

Post by Spunkster » Thu Jun 20, 2019 10:54 am

You are hitting a rev limit and shift cut according to the Datalog. You also have a strain gauge in put set that is probably what is triggering this.

payam_fox
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Re: AFRleans under boost after 7000 rpm , Please help , i cant figure this out !!!

Post by payam_fox » Fri Jun 21, 2019 11:14 am

it happens before the rev limiter , what is the strain gauge ? where can i turn it off ?

payam_fox
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Re: AFRleans under boost after 7000 rpm , Please help , i cant figure this out !!!

Post by payam_fox » Fri Jun 21, 2019 11:16 am

oh i saw it , let me change that to see if it changes , thanks bro :)

payam_fox
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Re: AFRleans under boost after 7000 rpm , Please help , i cant figure this out !!!

Post by payam_fox » Wed Jun 26, 2019 12:52 am

hey i have tried it its still the same , injectors stop working in some point , here is an example datalog
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Re: AFRleans under boost after 7000 rpm , Please help , i cant figure this out !!!

Post by Spunkster » Wed Jun 26, 2019 9:15 am

Post the calibration that the Datalog was made with.

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