Air/Fuel Ratio gauge

gray87GT · 05-15-2001, 06:06 PM

I have done my homework on this topic, and have come to the conclusion that 90% of you guys have nothing good to say about A/F ratio gauges (at least over on the Corral). ALL I want to do is know that I am not lean at WOT, that's it. I don't wanna tune with it, I only want it to be sure I don't have a lean condition. My question is: Will the Autometer A/F Ratio gauge do the job I want it to, will it tell me if I am running lean at WOT?? Thanks

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87 GT, BBK shorty's, MAC High-Flow H-pipe, ASP pullies, BBK 70mm T.B., Cobra intake, no smog pump, Windsor Jr irons, Comp cams 1.6 rollers, F303 cam, FMS HD water pump, Tri-Ax, FMS subframes, Battle boxes, SSM liftbars, FMS King Cobra clutch, mass-air conversion, 73mm C&L, 24lb injectors, BBK AFPR, 3/8" no EGR spacer,MAC pro-dumps, FMS 3.73's, and other piddly sh*t.

Rick 91GT · 05-15-2001, 10:27 PM

It will be fine for WOT, I read my plugs that is the only true way to see how it is running.

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Check Out My Site 91GT,Holley SysteMAX II Kit-Heads 2.02" x 1.60" port matched to a 1262,Anderson N-61,24#,76mm C&L,Full MAC exhaust 1-5/8" Long tubes,2-1/2" O.R H-Pipe,2 1/2" cat back, No A/C or PS or emissions, 12" K&N Filter,RNH PERFORMANCE Ram Air,Ron Davis Radiator,Full Suspension,S&W 8pt "X" brace,JAZ seats,3:73's,Welds..etc,4:30's and 31 splines coming very soon!

smokedchevy · 05-16-2001, 12:47 AM

I have the A/F gauge and mine works nicely. I had a vacuum leak before and I noticed on the gauge it was running really lean, so lean my plugs were turning white. My friend found the leak and we fixed it and the gauge went back to normal. It's only good at full throttle or under load, cruising around it fluctuates like mad, but this is normal. I like mine and it also looks cool.

joe4speed · 05-16-2001, 01:01 AM

I agree with smokedchevy
The one I have looks cool, and is pretty functional, it helped me when I was messing with fuel pressure combos.

------------------
Joe!
1988 GT, 167,000 miles!!! 13.58@105mph Check out my listing! Click here! Or my website:
www.joe4speed.com
1999 Ninja ZX-6R 10.32@135mph!
1993 Olds Eighty Eight LSS 16.40@88.8mph

TEXSN95 · 05-16-2001, 11:48 AM

At idle does your gauge bounce around? When I start it, it's lean for a bit, then as the rpms go down a bit when it's idling, I dont get a reading anymore until I drive. We spliced into the 2 EEC wires for the 02s, and ran them to a 3 way toggle. But when I switch from the left to right, the readings look exactly the same, like it isn't reading 2 different sensors. So I dunno what the hell is going on.

------------------
Clint L.
White 95 Cobra #3637
58cc GT40X heads with mild porting, Crane 2031 cam, FRPP 65 TB, 1.7s, Cobra intake, homeade cold air, 155lph, pullies, Tokico Illuminas, C springs, GW LCAs, Kenny Brown super subs, Steeda CC plates, aluminum driveshaft, Steeda quadrant, B&M ripper, Kirban FPR, MSD6A, Taylor wires, Mac shorties, off road hpipe, 2 1/2 ultra flows w/ dumps, R hood, Euro clear corners, stock 3.08s
13.61 @ 104.7 w/ 2.22

joe4speed · 05-16-2001, 12:03 PM

it bounces around big time, but that's normal, the gauge really only works at WOT (wide open throttle)
Good idea with the switch!

blueneonman1 · 05-16-2001, 12:20 PM

can someone tell me what the plugs would look like for a lean condition? I checked one of my plugs yesterday and it had a little brown/white on it. Is this normal? Also, should I check all the plugs or would one plug tell me about all cyliders? Thanks.

------------------
Blueneonman - '95 5.0L Mustang GT Convertible | K&N Custom Cold Air Intake | FMS 9mm Wires | Hollow Cats | Flowmaster 2 Chambers | BBK Subframes | 6-pt Rollcage | 14deg Timing | King Cobra Clutch | FMS Adjustable Clutch Cable | Coolest Neon Lighting on a Mustang EVER!

Homepage: http://www16.brinkster.com/blueneonman/

Best time: 14.578 @96.20mph

mjones · 05-16-2001, 01:22 PM

The guage will bounce around as the computer is constatntly componsating for changing conditions. That is what the o2 sensor does is give feed back to the computer regurding fuel mixture so id adds or deletes as nesecary. under light load conditions it is hard for it to find the exact amount of fuel required as injector on time is already very little a few milliseconds. so it will go up and down constantly. So it can be used for tuning etc as that is what the stock computer uses it for. You also have to remeber that most O2 sensors are heated so they do not give acurate results until there internal heater has got them upto 600 degrees.

jseaton · 05-16-2001, 01:27 PM

Do ant of you know what type of O2 sensor to run if you ran leaded fuel??? I know the normal ones will not last at all..

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82- 347, SVO A4, Scat Billet Crank, Crower Rods, Nowak Pistons, TFS Heads W/Crower Stainless Rockers, Victor Intake, Gold Claw, Paxton Fuel system, MSD ignition,

gray87GT · 05-16-2001, 05:17 PM

For you guys who have the gauge: I know the left HEGO is pin 43, and the right HEGO is pin 29. Should I splice into the HEGO ground pin 49, or just a chassis ground? Thanks

05-15-2001, 06:06 PM	#1
gray87GT Registered Member Join Date: Jan 2001 Location: Minnesota Posts: 177	Air/Fuel Ratio gauge I have done my homework on this topic, and have come to the conclusion that 90% of you guys have nothing good to say about A/F ratio gauges (at least over on the Corral). ALL I want to do is know that I am not lean at WOT, that's it. I don't wanna tune with it, I only want it to be sure I don't have a lean condition. My question is: Will the Autometer A/F Ratio gauge do the job I want it to, will it tell me if I am running lean at WOT?? Thanks ------------------ 87 GT, BBK shorty's, MAC High-Flow H-pipe, ASP pullies, BBK 70mm T.B., Cobra intake, no smog pump, Windsor Jr irons, Comp cams 1.6 rollers, F303 cam, FMS HD water pump, Tri-Ax, FMS subframes, Battle boxes, SSM liftbars, FMS King Cobra clutch, mass-air conversion, 73mm C&L, 24lb injectors, BBK AFPR, 3/8" no EGR spacer,MAC pro-dumps, FMS 3.73's, and other piddly sh*t.

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05-15-2001, 10:27 PM	#2
Rick 91GT Procharged! Join Date: May 1999 Location: Hanover, PA Posts: 1,539	It will be fine for WOT, I read my plugs that is the only true way to see how it is running. ------------------ Check Out My Site 91GT,Holley SysteMAX II Kit-Heads 2.02" x 1.60" port matched to a 1262,Anderson N-61,24#,76mm C&L,Full MAC exhaust 1-5/8" Long tubes,2-1/2" O.R H-Pipe,2 1/2" cat back, No A/C or PS or emissions, 12" K&N Filter,RNH PERFORMANCE Ram Air,Ron Davis Radiator,Full Suspension,S&W 8pt "X" brace,JAZ seats,3:73's,Welds..etc,4:30's and 31 splines coming very soon!

05-16-2001, 12:47 AM	#3
smokedchevy Registered Member Join Date: Jun 2000 Location: ventura,CA Posts: 438	I have the A/F gauge and mine works nicely. I had a vacuum leak before and I noticed on the gauge it was running really lean, so lean my plugs were turning white. My friend found the leak and we fixed it and the gauge went back to normal. It's only good at full throttle or under load, cruising around it fluctuates like mad, but this is normal. I like mine and it also looks cool.

05-16-2001, 01:01 AM	#4
joe4speed He said Member...heh, heh Join Date: Sep 1999 Location: Jupiter, Florida U.S.A. Posts: 3,718	I agree with smokedchevy The one I have looks cool, and is pretty functional, it helped me when I was messing with fuel pressure combos. ------------------ Joe! 1988 GT, 167,000 miles!!! 13.58@105mph Check out my listing! Click here! Or my website: www.joe4speed.com 1999 Ninja ZX-6R 10.32@135mph! 1993 Olds Eighty Eight LSS 16.40@88.8mph

05-16-2001, 11:48 AM	#5
TEXSN95 Registered Member Join Date: Mar 2001 Location: college station, tx Posts: 143	At idle does your gauge bounce around? When I start it, it's lean for a bit, then as the rpms go down a bit when it's idling, I dont get a reading anymore until I drive. We spliced into the 2 EEC wires for the 02s, and ran them to a 3 way toggle. But when I switch from the left to right, the readings look exactly the same, like it isn't reading 2 different sensors. So I dunno what the hell is going on. ------------------ Clint L. White 95 Cobra #3637 58cc GT40X heads with mild porting, Crane 2031 cam, FRPP 65 TB, 1.7s, Cobra intake, homeade cold air, 155lph, pullies, Tokico Illuminas, C springs, GW LCAs, Kenny Brown super subs, Steeda CC plates, aluminum driveshaft, Steeda quadrant, B&M ripper, Kirban FPR, MSD6A, Taylor wires, Mac shorties, off road hpipe, 2 1/2 ultra flows w/ dumps, R hood, Euro clear corners, stock 3.08s 13.61 @ 104.7 w/ 2.22

05-16-2001, 12:03 PM	#6
joe4speed He said Member...heh, heh Join Date: Sep 1999 Location: Jupiter, Florida U.S.A. Posts: 3,718	it bounces around big time, but that's normal, the gauge really only works at WOT (wide open throttle) Good idea with the switch!

05-16-2001, 12:20 PM	#7
blueneonman1 Registered Member Join Date: Mar 2001 Location: Palm Harbor, FL Posts: 208	can someone tell me what the plugs would look like for a lean condition? I checked one of my plugs yesterday and it had a little brown/white on it. Is this normal? Also, should I check all the plugs or would one plug tell me about all cyliders? Thanks. ------------------ Blueneonman - '95 5.0L Mustang GT Convertible \| K&N Custom Cold Air Intake \| FMS 9mm Wires \| Hollow Cats \| Flowmaster 2 Chambers \| BBK Subframes \| 6-pt Rollcage \| 14deg Timing \| King Cobra Clutch \| FMS Adjustable Clutch Cable \| Coolest Neon Lighting on a Mustang EVER! Homepage: http://www16.brinkster.com/blueneonman/ Best time: 14.578 @96.20mph

05-16-2001, 01:22 PM	#8
mjones Registered Member Join Date: Aug 1999 Location: London, Ontario, Canada Posts: 10	The guage will bounce around as the computer is constatntly componsating for changing conditions. That is what the o2 sensor does is give feed back to the computer regurding fuel mixture so id adds or deletes as nesecary. under light load conditions it is hard for it to find the exact amount of fuel required as injector on time is already very little a few milliseconds. so it will go up and down constantly. So it can be used for tuning etc as that is what the stock computer uses it for. You also have to remeber that most O2 sensors are heated so they do not give acurate results until there internal heater has got them upto 600 degrees.

05-16-2001, 01:27 PM	#9
jseaton Registered Member Join Date: Sep 1998 Location: carrollton,texas,usa Posts: 59	Do ant of you know what type of O2 sensor to run if you ran leaded fuel??? I know the normal ones will not last at all.. ------------------ 82- 347, SVO A4, Scat Billet Crank, Crower Rods, Nowak Pistons, TFS Heads W/Crower Stainless Rockers, Victor Intake, Gold Claw, Paxton Fuel system, MSD ignition,

05-16-2001, 05:17 PM	#10
gray87GT Registered Member Join Date: Jan 2001 Location: Minnesota Posts: 177	For you guys who have the gauge: I know the left HEGO is pin 43, and the right HEGO is pin 29. Should I splice into the HEGO ground pin 49, or just a chassis ground? Thanks