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Injectors being cut
Posted: Sun Jun 10, 2018 1:15 pm
by darren
So if I'm driving along at say 30mph, 1% to 2% throttle, my injectors keep being cut causing a jerk.
Engine is a b16 on ITB's
Any ideas?
Re: Injectors being cut
Posted: Mon Jun 11, 2018 9:31 am
by Spunkster
Has this been properly tuned on the dyno?
Re: Injectors being cut
Posted: Mon Jun 11, 2018 11:42 am
by darren
It has been tuned on a dyno by myself, its my first tune so I'm still learning but runs great apart from 1-2% throttle opening. I shall upload the datalog
Re: Injectors being cut
Posted: Mon Jun 11, 2018 11:46 am
by darren
You can see the problem in the first 15 seconds
Re: Injectors being cut
Posted: Mon Jun 11, 2018 5:18 pm
by Spunkster
Post the calibration as well
Re: Injectors being cut
Posted: Mon Jun 11, 2018 11:53 pm
by darren
Calibration is now attached
Re: Injectors being cut
Posted: Tue Jun 12, 2018 5:03 pm
by Spunkster
Do you have the MAP sensor connected and reading vacuum?
Re: Injectors being cut
Posted: Wed Jun 13, 2018 5:01 am
by darren
Yes, vacuum taken from all 4 runner's to a vac box, then map sensor reading vac from there
Re: Injectors being cut
Posted: Wed Jun 13, 2018 9:13 am
by Spunkster
IT is most likely form the overrun fuel cutoff settings. Try adjusting those and see if that has the desired effect.
Re: Injectors being cut
Posted: Mon Jun 18, 2018 10:56 am
by 2x0
Go into TPS parameters, lower the TPS % for overrun fuel cutoff (TPS), and lower the numbers for MAP (kPa) in the overrun cutoff (MAP). I use 18-19 on mine up to around 4000rpm and its smooth as can be.