How do you lean the car out at idle?
Thread Starter
Launching!
Joined: Mar 2002
Posts: 229
Likes: 0
From: Amarillo
How do you lean the car out at idle? How do you lean the car out at idle? I've installed 30 lb SVO injectors. At idle my Ltrims are
-10 to -12. The car smells really rich when your at the back by the exhaust.
Thanks
-10 to -12. The car smells really rich when your at the back by the exhaust.
Thanks
Re: How do you lean the car out at idle? Multiply the IFR table across the board by 110. Should get you close to 0 or neg. Go from there.
Since at part throttle you are not rich or lean, the trims are correcting, wonder why you smell gas? Did you change headers or exhaust?
Since at part throttle you are not rich or lean, the trims are correcting, wonder why you smell gas? Did you change headers or exhaust?
Re: How do you lean the car out at idle?
Multiply the IFR table across the board by 110. Should get you close to 0 or neg. Go from there.
Since at part throttle you are not rich or lean, the trims are correcting, wonder why you smell gas? Did you change headers or exhaust?
Since at part throttle you are not rich or lean, the trims are correcting, wonder why you smell gas? Did you change headers or exhaust?
Re: How do you lean the car out at idle? -L trims means that fuel is being removed!
If you don't have LS1 Edit and have a MAF Translator you can lean out the base setting.
As an aside, when you see misfires in Atap with some cars, some of those misfires are due to a car running rich and the plugs are loading up.
If you don't have LS1 Edit and have a MAF Translator you can lean out the base setting.
As an aside, when you see misfires in Atap with some cars, some of those misfires are due to a car running rich and the plugs are loading up.
Thread Starter
Launching!
Joined: Mar 2002
Posts: 229
Likes: 0
From: Amarillo
Re: How do you lean the car out at idle? I have ls1 edit. I think my problem with my car stumbling when I take off is do to it being to rich and loading up the spark plugs.
I will adjust my IFR table.
Thanks for the help.
I will adjust my IFR table.
Thanks for the help.
Re: How do you lean the car out at idle? I see a cam here, if you have a cam with some significant
overlap, you can "shoot through" some fuel/air while
both valves are open (BDC). At higher RPM you're just
"pipelining" and it's good. At idle you have enough time
to blow through. An exhaust that's doing some resonant
extraction will provide the draw-through.
As indicated by LTFTs of 10-12, the computer is in
control of the average idle mixture (it is not pegged
out at -25 or +25). You could lean it out but there's
a good chance that this won't matter.
A 10% rich natural mixture error will only put you to
about 13.2-13.4:1 AFR which should not be a killer;
inefficient, yes, but not too bad. At least when you
step off the map for closed loop you'll be in a good
place (slightly rich to cover any lean transients from
throttle etc.).
overlap, you can "shoot through" some fuel/air while
both valves are open (BDC). At higher RPM you're just
"pipelining" and it's good. At idle you have enough time
to blow through. An exhaust that's doing some resonant
extraction will provide the draw-through.
As indicated by LTFTs of 10-12, the computer is in
control of the average idle mixture (it is not pegged
out at -25 or +25). You could lean it out but there's
a good chance that this won't matter.
A 10% rich natural mixture error will only put you to
about 13.2-13.4:1 AFR which should not be a killer;
inefficient, yes, but not too bad. At least when you
step off the map for closed loop you'll be in a good
place (slightly rich to cover any lean transients from
throttle etc.).
