air fuel ratio going crazy

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Nov 4, 2004 | 11:13 AM

Choppa

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3rd Gear Member

Joined: Dec 2003

Posts: 518

From:

air fuel ratio going crazy

My frined jus installed an air fuel ratio gauge an autometer one now as hes cruising the light is bouncing around form rich to lean and flies around faster when he floors it to him he doenst really care he jus likes it cuz he thingks its cool (i also think theyre are kinda cool for looks) but shouldnt the light stay in one spot or stay close to the same spot when your jus cruising. why does it jump around so much

Nov 4, 2004 | 01:17 PM

roundman

5th Gear Member

Joined: Mar 2004

Posts: 4,813

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RE: air fuel ratio going crazy

sounds to me like a bad connection or a bad O2 sensor where he hooked it up.

Nov 4, 2004 | 01:27 PM

mdvaldosta

I ♥ Acer

Joined: Sep 2003

Posts: 8,826

From: United States

RE: air fuel ratio going crazy

Quote:

ORIGINAL: Choppa

My frined jus installed an air fuel ratio gauge an autometer one now as hes cruising the light is bouncing around form rich to lean and flies around faster when he floors it to him he doenst really care he jus likes it cuz he thingks its cool (i also think theyre are kinda cool for looks) but shouldnt the light stay in one spot or stay close to the same spot when your jus cruising. why does it jump around so much

no its gonna bounce around all over the place all the time, except when your idleing it should steady out in the stoich area. WHen you go full throttle it should show rich. It bounces around because your a/f bounces around.

Nov 4, 2004 | 02:25 PM

luckythirteen13

6th Gear Member

Joined: May 2004

Posts: 9,092

From: las vegas, nv

RE: air fuel ratio going crazy

^^^^^^^ hes right

quick question on the subject.....when setting fuel pressure, you want the car idling and watch as the air/fuel ratio changes right? and when its stoich you stop there? or should i pay more attention to fuel pressure?

Nov 4, 2004 | 02:37 PM

Birdieman4

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Joined: Oct 2003

Posts: 3,020

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RE: air fuel ratio going crazy

It is supposed to move around, except under load. Under load it should show a steady 'full rich' green light. If that green light starts to move toward the lean side at all under load, you are probably too lean. I have this same gage on my Procharged 01 S281, but have since abandonded this method and now I only use a digital wideband.