Air / Fuel after throttle lift - Is this normal >> ?
#1
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Air / Fuel after throttle lift - Is this normal >> ?
When I let off the throttle my A/F goes threw the roof. It comes right back down to normal, but seems odd that motor would run that lean for sec...
Here is a log of what is going on when going to 2k RPM and letting off.
thanks,
platinum
Here is a log of what is going on when going to 2k RPM and letting off.
thanks,
platinum
#3
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Re: Air / Fuel after throttle lift - Is this normal >> ? (Lonnieboosted)
So is the motor really runing that lean, or is it just cause the gas gets sucked out of the exhaust during lift?
platinum
platinum
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#8
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Re: Air / Fuel after throttle lift - Is this normal >> ? (Muckman)
No for sure not part throttle. A/F looks fine during throttle and boost.
I guess it's the injectors shuting off when decelerating.
Learn something everyday from you guys.
thank you,
platinum
I guess it's the injectors shuting off when decelerating.
Learn something everyday from you guys.
thank you,
platinum
#9
Honda-Tech Member
Re: Air / Fuel after throttle lift - Is this normal >> ? (Muckman)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Muckman »</TD></TR><TR><TD CLASS="quote">The injectors shut off completely when your decelerating off the throttle completely. However if your at part throttle and its that lean then you have a problem.</TD></TR></TABLE>
hit the nail on the head
hit the nail on the head
#10
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Re: Air / Fuel after throttle lift - Is this normal >> ? (platinum00)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by platinum00 »</TD></TR><TR><TD CLASS="quote">No for sure not part throttle. A/F looks fine during throttle and boost.
I guess it's the injectors shuting off when decelerating.
Learn something everyday from you guys.
thank you,
platinum</TD></TR></TABLE>
Thats it! I noticed when i let off my Wideband would go nuts!! Like -x38 past 1:100 AFR lol!
I guess it's the injectors shuting off when decelerating.
Learn something everyday from you guys.
thank you,
platinum</TD></TR></TABLE>
Thats it! I noticed when i let off my Wideband would go nuts!! Like -x38 past 1:100 AFR lol!
#13
thats normal man
that means the ecu cut off the duty cycle on the injectors to a point it will lean
the amount of fuel and air consumed by the engine is minimal and poses no threat to the engine
everytime i datalog my air fuels during shifts it also climbs up to 21 afr's and goes back to normal
that means the ecu cut off the duty cycle on the injectors to a point it will lean
the amount of fuel and air consumed by the engine is minimal and poses no threat to the engine
everytime i datalog my air fuels during shifts it also climbs up to 21 afr's and goes back to normal
#16
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Re: (93turbo16)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93turbo16 »</TD></TR><TR><TD CLASS="quote">That is why when you datalog, you set a min TPS, so you don't get those big spikes in the A/F. </TD></TR></TABLE>
is this in the EMS software?
platinum
is this in the EMS software?
platinum
#17
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Re: (platinum00)
thats wierd, cause when I let go of the gas/shift my A/F goes rich. It will read rich for like 2-3 seconds THEN go lean. Its wierd cause when im driving, I shift from 2nd and the a/f goes rich then go into 3rd, if I shift fast the a/f is still rich and when I give it some gas in 3rd it'll make a small pop. It does this just about every time in every gear.
I'm running crome with the plx m300.
I'm running crome with the plx m300.
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