Go Back   EcoModder Forum > EcoModding > Off-Topic Tech
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 07-06-2009, 12:30 PM   #1 (permalink)
Master EcoModder
 
Join Date: Jul 2008
Location: Tallmadge, OH
Posts: 313
Thanks: 6
Thanked 26 Times in 21 Posts
O2 sensor?

I sure miss the old days with no extra electronics on my car... So, I'm here for some suggestions. Check engine light came on--code says O2 sensor (there are 2), map sensor, vaccum leak. Since the light came on, the car falls flat on it's face when I try to accelerate w/ cold engine. I'm guessing that the heater in the sensor is shot. After the engine is warm, I have no problem.

Mazda sites say that usually the front O2 goes and the rear, almost never. I replaced the front sensor last summer, and the car has only seen about 3500 miles since.

The car is a stock 1997 Mazda Miata, with a 1.8L FI engine.

Over the weekend, I checked the intake ducting, cleaned the IAS and PVC valve, and made sure that there were no odd vaccuum leaks.

Input greatly appreciated. -Ed

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 07-06-2009, 12:52 PM   #2 (permalink)
Dartmouth 2010
 
SVOboy's Avatar
 
Join Date: Nov 2007
Location: Hanover, NH
Posts: 6,447

Vegan Powa! - '91 Honda CRX DX
Team Honda
90 day: 66.52 mpg (US)
Thanks: 92
Thanked 119 Times in 87 Posts
Send a message via AIM to SVOboy Send a message via MSN to SVOboy Send a message via Yahoo to SVOboy
You might have gotten a bad sensor. It happens. I would try swapping with someone who has a working one just to check.
  Reply With Quote
Old 07-06-2009, 01:10 PM   #3 (permalink)
Master EcoModder
 
wagonman76's Avatar
 
Join Date: Jun 2008
Location: Northwest Lower Michigan
Posts: 1,006

Red Car - '89 Chevrolet Celebrity CL 4 door
Team Chevy
90 day: 36.47 mpg (US)

Winter Wagon - '89 Pontiac 6000 LE Wagon
90 day: 28.26 mpg (US)
Thanks: 8
Thanked 17 Times in 16 Posts
Check the wiring connector too and make sure the connections are firm. I have had several go screwy on my cars, including the one for the O2 sensor.
__________________

Winter daily driver, parked most days right now


Summer daily driver
  Reply With Quote
Old 07-06-2009, 02:45 PM   #4 (permalink)
Master EcoModder
 
tasdrouille's Avatar
 
Join Date: Jan 2008
Location: Mirabel, QC
Posts: 1,672

The Guzzler - '08 Hyundai Elantra GL
90 day: 33.12 mpg (US)

Got Soul? - '11 Kia Soul 2U
Thanks: 35
Thanked 85 Times in 56 Posts
Any reason just why O2 sensors go out? Carbon fouling? Why not try cleaning them?
__________________



www.HyperKilometreur.com - Quand chaque goutte compte...
  Reply With Quote
Old 07-07-2009, 01:09 PM   #5 (permalink)
Master EcoModder
 
wagonman76's Avatar
 
Join Date: Jun 2008
Location: Northwest Lower Michigan
Posts: 1,006

Red Car - '89 Chevrolet Celebrity CL 4 door
Team Chevy
90 day: 36.47 mpg (US)

Winter Wagon - '89 Pontiac 6000 LE Wagon
90 day: 28.26 mpg (US)
Thanks: 8
Thanked 17 Times in 16 Posts
Don't know but I have read that trying to clean them ruins the element. Not sure of the truth behind it.
__________________

Winter daily driver, parked most days right now


Summer daily driver
  Reply With Quote
Old 07-08-2009, 04:39 PM   #6 (permalink)
Master EcoModder
 
Join Date: Jul 2008
Location: Russellville, KY
Posts: 540
Thanks: 8
Thanked 33 Times in 27 Posts
A mechanic friend of mine told me you could soak the 02 sensor in Sea Foam over night to clean them without doing any damage, I have never tried it so do it at your own risk. Another option is going on eBay and searching universal 02 sensor, they can be bought for about $20. each, you just have to cut the plug off your old sensor and splice it on the new one. I put them on a '96 Contour several years ago and haven't had any problems with them.
__________________



  Reply With Quote
Old 07-08-2009, 04:56 PM   #7 (permalink)
one of thOOOse people
 
Join Date: Mar 2009
Location: the cloud(s)
Posts: 293

twitchy - '98 honda civic dx + sir + ls
90 day: 30.2 mpg (US)

Norman - '14 Ford E-350 EXT
90 day: 15.07 mpg (US)
Thanks: 0
Thanked 81 Times in 66 Posts
I've had a similar problem in the past, turned out I forgot to torque the O2 sensor and it vibrated loose.
I've also used a universal sensor from Bosch. 5 years no problems. (except needing to be torqued after a few months of weird symptoms.)
  Reply With Quote
Old 07-08-2009, 05:02 PM   #8 (permalink)
Manic Rabbit
 
Southcross's Avatar
 
Join Date: Mar 2009
Location: Denver, CO
Posts: 134

Slow-n-Low - '81 Volkswagen Rabbit S
TEAM VW AUDI Group
90 day: 33.97 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
a few things can kill an O2... Rich mixtures, excessive exhaust heat, carbon/oil fowling, one sure way to kill an O2 is getting anti-sieze on anything but the threads.

if you have any kind of air leak, intake or exhaust, it can trip the Oxygen sensor into believing the engine is suddenly running lean... tripping the CEL
__________________
-Edward

Driven on Colorado roads, where NOTHING is flat
Present City 3x / Highway 4x
Goal: 4x / 5x
  Reply With Quote
Old 07-08-2009, 06:14 PM   #9 (permalink)
Master EcoModder
 
tasdrouille's Avatar
 
Join Date: Jan 2008
Location: Mirabel, QC
Posts: 1,672

The Guzzler - '08 Hyundai Elantra GL
90 day: 33.12 mpg (US)

Got Soul? - '11 Kia Soul 2U
Thanks: 35
Thanked 85 Times in 56 Posts
Why don't you try swapping the O2 sensors? If your front O2 sensor is the culprit the code will change to tell you your cat is bad, but performance should be restored when the engine is cold.
__________________



www.HyperKilometreur.com - Quand chaque goutte compte...
  Reply With Quote
Old 07-09-2009, 10:11 AM   #10 (permalink)
Manic Rabbit
 
Southcross's Avatar
 
Join Date: Mar 2009
Location: Denver, CO
Posts: 134

Slow-n-Low - '81 Volkswagen Rabbit S
TEAM VW AUDI Group
90 day: 33.97 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by tasdrouille View Post
Why don't you try swapping the O2 sensors? If your front O2 sensor is the culprit the code will change to tell you your cat is bad, but performance should be restored when the engine is cold.
some cars use completely different sensors for the front and back...

__________________
-Edward

Driven on Colorado roads, where NOTHING is flat
Present City 3x / Highway 4x
Goal: 4x / 5x
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Converting Cali Civic VX to Fed (lean burn) VX NachtRitter DIY / How-to 83 06-20-2015 11:30 AM
My Kingdom for a NOx Sensor cfg83 EcoModding Central 19 08-25-2010 06:55 PM
VX Info...WARNING: lots of info! TomO Off-Topic Tech 1 01-05-2010 12:39 PM
O2 Sensor problem Need help! Curly1 DIY / How-to 1 05-23-2009 06:50 PM
O2 Sensor Resistor Matt Herring EcoModding Central 11 06-26-2008 04:47 PM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com