Miss Under Boost.air/fuel Gauge Eratic

[SS#eater]

hi i just installed a auto meter air fuel ratio gauge straight from ecu wire pin out 29...anyway its very eratic i wound the boost up tp 10 and i get a missfire under boost and a/f gauge says car is leaning out like even at idle it even drops completetly off the gauge on the l;ean side..gauge faulty? its hardly ever in green basically stock r33 gtst s1 fmic exhaust..pod....

eratic gauge

what u think gauge rooted wrong wiring?

missfie

boost ? pugs gapped wrong?

plugs farked? coil packs

its not r&r

vacuum leak i dunno its driving me crazy...cars fine on standard boost dosent miss a beat under 10pound boost missfire quite a bit

Edited August 5, 2006 by SS#eater

[paulr33]

the air fuel ratio guage is erratic as its read of the stock slow and narrow sensor. its not accurate enough to give any useful data on an af guage. if you had a wideband 02 sensor it would be spot on and accurate. you are best off either ignoring the output from the guage, change to a wideband 02 sensor or sell the guage and move on. the guage and the stock 02 sensor will never be accurate.

the misfiring could be the r&r protection being activated in the stock ecu. try at 9psi and see if happens at that pressure

[SS#eater]

the air fuel ratio guage is erratic as its read of the stock slow and narrow sensor. its not accurate enough to give any useful data on an af guage. if you had a wideband 02 sensor it would be spot on and accurate. you are best off either ignoring the output from the guage, change to a wideband 02 sensor or sell the guage and move on. the guage and the stock 02 sensor will never be accurate.

the misfiring could be the r&r protection being activated in the stock ecu. try at 9psi and see if happens at that pressure

at 9 it is fine not a problem....i am quite happy at 9psi

paulr33 or anyone can u recommend a wideband 02 sensor suitable 4 my needs maybe part number...cost any info plz thanks 4 helping

[kjb_r33]

Wideband sensors probably start at around 300

[paulr33]

yeah they arent cheap and are really only useful when you can tune the fuel injection. its kinda pointless to have one in the car full time without being able to change anything. unless you have different ecu ?

[Beer Baron]

like the above guys have suggested the autometer AFR guages used with standard O2 sensor are a waste of time. I'ts about as good at telling you your AFR as your stereo is.

[paulr33]

haha

[SS#eater]

haha

yeah i noticed that...i have a power fc comming..wanted the a/f to be sure everything went right when pfc goes in

thanks anyway...i will put the a/f gauge on hold...spend my little amount of money on better things...

cheers

[rob82]

All I can say is at least your 02 sensor is working. LOL

[T04GTR]

but the guage looks cool rite?

[joc]

but the guage looks cool rite?

Hay guys maybe you's can help me out as well my a/f gauge doesnt not bounce back and forth between lean and rich it just sits on stoich with about 4 lights lit up when you accelerate it might move 2 bars towards rich, but it has never bounced back and forth (like i have heard and have read its supposed to) is somthing wrong with gauge or is it normal for a 1.5 series skyline,also i have wired it up in accordance with autometers installation guide.thanks in advance.Also im not using standard computer anymore im using power fc.