How can i tell if i'm running Lean or not?
09-01-2009, 01:56 PM
#1
4th Gear Member
Thread Starter
Join Date: Jul 2009
Location: Virginia
Posts: 1,216
How can i tell if i'm running Lean or not?
My gauges are all fine, temp. oil pressure amps, everything looks good, but more and more, even when in nuetral if i give it a good race up, i can smell fuel like it was poured in my back seat, same with WOT, won't be long after i can smell it. Does that mean i'm running lean? if so how can i fix that, i heard its bad news causes detentation, which causes the paper weight effect.
09-01-2009, 02:12 PM
#2
2nd Gear Member
Join Date: Oct 2008
Location: california
Posts: 380
well lean means your running less fuel so i would guess your running rich if you could smell the fuel. you could hear detonation it sounds almost like popcorn popping at the top end of the rpm range. i went too lean on a predator and it would detonate right after the 1-2 shift when the motor was under full load.
09-01-2009, 02:17 PM
#3
TECH SAVANT
Join Date: Dec 2006
Location: Saint Augustine, FL
Posts: 10,938
+1, if you are smelling fuel it's probably rich, not having cats will make it stink too--if it smells like raw fuel then something is very wrong.
Beyond that, you need a wide band O2 sensor to properly tune your engine--there is no other way to accurately determine AFR across the entire power band...
Beyond that, you need a wide band O2 sensor to properly tune your engine--there is no other way to accurately determine AFR across the entire power band...
09-01-2009, 02:29 PM
#7
2nd Gear Member
Join Date: Oct 2008
Location: california
Posts: 380
you can just "eyeball" it with a handheld tuner that lets you adjust the parameters of the air/fuel ratio. you wouldnt be able to tell if you were on point tho unless you have a wide band.. do it the right way and get a dyno tune
