how to correct going rich on decel
#1
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Location: Raleigh, NC
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how to correct going rich on decel
this is pretty aggravating because i think it's affecting my mpg's alot. i have the ve table 90% right, i can't really tune the really low kpa rows because everytime i let off the gas it immediately wants to go rich.. like 11.0 rich. i have 80lb fic injectors with all their data already in the tune. what can be adjusted in the tune to help with this? i don't know anything about transient fueling or dfco, haven't messed with either of them. my current tune is attached
#6
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Larger high impedance injectors are inherently lazy at low pulsewidths, on decel your engine needs very little fuel and a larger injector even at its smallest pulse width may still dump to much fuel. Pulse adder is very important at this point as it compensates for a larger slower injector and commands the injector to fire sooner to factor in the latency.
Long story short it is a inherent problem. Fine tuning can help reduce it but....
Long story short it is a inherent problem. Fine tuning can help reduce it but....
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#9
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I wouldn't worry about it, honestly... If everyone was concerned enough about the mileage lost while going rich on hard decel they wouldn't have modifications done to require injectors that size anyway lol. If you want more control of the fueling at low pulse width, get some low Z injectors.
#10
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I wouldn't worry about it, honestly... If everyone was concerned enough about the mileage lost while going rich on hard decel they wouldn't have modifications done to require injectors that size anyway lol. If you want more control of the fueling at low pulse width, get some low Z injectors.