Oxygen Sensor Questions
Thread Starter
Burning Brakes
Joined: Aug 2003
Posts: 899
Likes: 0
From: Copperas Cove TX
Oxygen Sensor Questions
Is there any way to test the Oxygen Sensor to see if It's functioning correctly??? Also can they be cleaned or does it make a difference???
HAVE A GREAT DAY!!!!!!!!!
HAVE A GREAT DAY!!!!!!!!!
Drifting
Joined: May 1999
Posts: 1,478
Likes: 3
From: Sacramento, CA Money can't buy happiness - but it's more comfortable to cry in a Corvette than a Yugo.
A good scan tool can tell you exactly what the O2 sensor is doing and if it is operating correctly. A Tech1 or Tech2 at the dealership can do it also. While you "could" clean it, I believe that most agree not to.
They run about $25 - $45 bucks depending on the brand and type. Not that hard to replace in general.
Over at Corvette Action Center, Hib Halverson has a review of the newer style Denso O2 sensors versus the AC-Delco units and he appears to prefer the Denso units for his 95 ZR1. While an O2 sensor should last 75k - 100k miles, Hib recommends replacing them much sooner. Around 50k I believe.
They run about $25 - $45 bucks depending on the brand and type. Not that hard to replace in general.
Over at Corvette Action Center, Hib Halverson has a review of the newer style Denso O2 sensors versus the AC-Delco units and he appears to prefer the Denso units for his 95 ZR1. While an O2 sensor should last 75k - 100k miles, Hib recommends replacing them much sooner. Around 50k I believe.
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
You can jump the A&B terminals on the ALDL then idle the engine. The frequency of the SES flashes will tell you if the system is in open or closed loop. If the system goes closed loop, the 02 is working, but the SES fglashes won't tell you how well.
If I remember correctly, one flash per second indicates closed loop and faster flashes indicate open loop.
To see how quickly it's cycling, you need a data logger. I don't know of any other way.
Jake
If I remember correctly, one flash per second indicates closed loop and faster flashes indicate open loop.
To see how quickly it's cycling, you need a data logger. I don't know of any other way.
Jake
Thread Starter
Burning Brakes
Joined: Aug 2003
Posts: 899
Likes: 0
From: Copperas Cove TX
Thanks Guy's The car is an 86 and I have no idea if it's been changed. Think it's time to get a new one. I'm putting one of Mid America's straight-thru stainless systems with Borla stainless mufflers so this will be a great time to do it. What is a good one??? Mike 88 Z 51 mentioned the Denso.
HAVE A GREAT DAY!!!!!!!!!
HAVE A GREAT DAY!!!!!!!!!
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
I've got an 86 also.
If you're going to run full length headers, you'll need a heated 02 sensor, Bosch 13190 at AutoZone.
Simple three wire hookup: one white wire goes to ground, the other white wire goes to a switched 12 volt source and the black wire ties into your existing 02 wire.
Hope this helps.
Jake
If you're going to run full length headers, you'll need a heated 02 sensor, Bosch 13190 at AutoZone.
Simple three wire hookup: one white wire goes to ground, the other white wire goes to a switched 12 volt source and the black wire ties into your existing 02 wire.
Hope this helps.
Jake
Last edited by JAKE; May 17, 2005 at 06:37 PM. Reason: Spelling. I'm Brain Dead Today
Melting Slicks
Joined: Oct 2004
Posts: 2,510
Likes: 4
From: Austin Texas
Racer
Joined: Jan 2005
Posts: 312
Likes: 0
From: Las Vegas / Scotland
Originally Posted by 1uke
Jake,
How high a mv reading is their supposed to be at an idle with long tubes?
How high a mv reading is their supposed to be at an idle with long tubes?
Steve
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Originally Posted by 1uke
Jake,
How high a mv reading is their supposed to be at an idle with long tubes?
How high a mv reading is their supposed to be at an idle with long tubes?
Our systems cannot maintain a perfectly constant 14.7 air/fuel ratio. Instead, what it does is go from rich to lean and back to rich again, over and over. If you monitor the activity with a data logger you'll also see the Rich/Lean indicator constantly switching back and forth between rich and lean.
So the 02 voltage will continually cycle over the 450mV mid-range and sort of averages the A/F ratio. The 02 voltage should not be constant either above or below 450 mV but should cycle.
Jake