Do I have bad oxygen sensors?

dashapht · 09-22-2001, 02:12 AM

I've been fighting a surging idle for a while now.. finally pulled the codes tonight.

I got "air/fuel mixture is out of range for self test"
and "EGO sensor reports lean air/fuel mixture"

The problem is that the car is running extremely rich (bad enough to burn your eyes) which would contradict with this reading. Could the O2 sensors be bad, thinking the mixture is lean, and dumping fuel in? then seeing the extra fuel, say "oops, im rich now!" take fuel away, and keep on doing that cycle, in turn causing a surge? this surging sucks!

thanks

------------------
93 Reef Blue Notchback, 74k miles (August 2001), TFS TW Heads, TFS Stage 1 Cam, TFS Track Heat Intake, 1.6 RR's, 70mm TB, Cold Air ,76mm MAF Meter, 24lb injectors, 255lph in-tank, AFPR, Edelbrock Water Pump, Be Cool Radiator, Mac 1 5/8" Long Tube Headers, 2.5" Pro Chamber, Flowmaster 2 CH 2.5" Cat Back, 3.73 , Alum Driveshaft, Auburn Differential, 17x9 Cobra Rs with Nitto 555s, Tri-Ax Shifter.
Got to make a pass finally! 8.44 @ 85mph on regular radials.
My new website: <A HREF="http:

09-22-2001, 02:12 AM	#1
dashapht Registered Member Join Date: Jan 2001 Location: nashville, tn Posts: 72	Do I have bad oxygen sensors? I've been fighting a surging idle for a while now.. finally pulled the codes tonight. I got "air/fuel mixture is out of range for self test" and "EGO sensor reports lean air/fuel mixture" The problem is that the car is running extremely rich (bad enough to burn your eyes) which would contradict with this reading. Could the O2 sensors be bad, thinking the mixture is lean, and dumping fuel in? then seeing the extra fuel, say "oops, im rich now!" take fuel away, and keep on doing that cycle, in turn causing a surge? this surging sucks! thanks ------------------ 93 Reef Blue Notchback, 74k miles (August 2001), TFS TW Heads, TFS Stage 1 Cam, TFS Track Heat Intake, 1.6 RR's, 70mm TB, Cold Air ,76mm MAF Meter, 24lb injectors, 255lph in-tank, AFPR, Edelbrock Water Pump, Be Cool Radiator, Mac 1 5/8" Long Tube Headers, 2.5" Pro Chamber, Flowmaster 2 CH 2.5" Cat Back, 3.73 , Alum Driveshaft, Auburn Differential, 17x9 Cobra Rs with Nitto 555s, Tri-Ax Shifter. Got to make a pass finally! 8.44 @ 85mph on regular radials. My new website: <A HREF="http:

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