1994 S10 Blazer 4x4 O2 Sensor help wanted..

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1994 S10 Blazer 4x4 O2 Sensor help wanted..

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Blazer Forum >> Mechanical & Maintenance >> General Tech Help >> 1st Gen S-series (1983-1994) Tech >> 1994 S10 Blazer 4x4 O2 Sensor help wanted..

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1994 S10 Blazer 4x4 O2 Sensor help wanted.. - 10/25/2007 10:47:43 AM

CrashPro993

Posts: 15
Joined: 10/25/2007
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What should my resistance values be if my O2 sensor is working properly? I only found (1) 02 sensor also, is there more? Thanks for any help...

Nolan

Post #: 1

RE: 1994 S10 Blazer 4x4 O2 Sensor help wanted.. - 10/25/2007 12:11:19 PM

swartlkk

Posts: 15291
Joined: 5/1/2005
From: Waterloo, NY
Status: online

To properly diagnose an O2 sensor, you need to watch the sensor voltage (in mV) and the activity of that voltage (lean/rich cross counts). On older vehicles, an oscilliscope is the tool of choice for accurately seeing the operational characteristics of your O2 sensor.

And yes, you only have one(1) O2 sensor.

*EDIT* - *Moving to 1st Gen Tech*

No need to double post your question...

< Message edited by swartlkk -- 10/25/2007 12:13:15 PM >

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(in reply to CrashPro993)

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RE: 1994 S10 Blazer 4x4 O2 Sensor help wanted.. - 10/25/2007 12:25:36 PM

CrashPro993

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Joined: 10/25/2007
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thanks, ive seen several posts on here about emissions and the severity of removing them. I live in OK and there aren't any inspections much less emissions testing facilities. Is there a way to make or purchase an o2 sensor simulator for my vehicle. I see several out there for OBDII vehicles but none for OBDI? What type of reading is the ECM looking for? Is an O2 sensor a PTC/NTC type sensor? Thank your for your help.

p.s. sorry about the repost.

(in reply to swartlkk)

Post #: 3

RE: 1994 S10 Blazer 4x4 O2 Sensor help wanted.. - 10/25/2007 12:29:27 PM

swartlkk

Posts: 15291
Joined: 5/1/2005
From: Waterloo, NY
Status: online

Your O2 sensor isn't used for emissions monitoring. The PCM uses it to determine the proper rate at which to inject fuel into the engine. It has to stay if you want your truck to run efficiently.

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RE: 1994 S10 Blazer 4x4 O2 Sensor help wanted.. - 10/25/2007 1:00:09 PM

CrashPro993

Posts: 15
Joined: 10/25/2007
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Sorry for the misunderstanding, I'm putting a full exhaust on my truck and Im wanting to eliminate the the cat and o2 sensor. Should have stated that, sorry for wasting your time.

(in reply to swartlkk)

Post #: 5

RE: 1994 S10 Blazer 4x4 O2 Sensor help wanted.. - 10/25/2007 2:34:03 PM

swartlkk

Posts: 15291
Joined: 5/1/2005
From: Waterloo, NY
Status: online

No time wasted at all. As I already stated, you cannot eliminate the upstream (well the only one in this case) O2 sensor and hope to have your engine run properly. The PCM uses the air/fuel ratio information from the O2 sensor to determine how much fuel to put in.

Also, it is still a federal crime to remove emissions equipment from a vehicle originally equiped with ones. Just an FYI so you are prepared...

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(in reply to CrashPro993)

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RE: 1994 S10 Blazer 4x4 O2 Sensor help wanted.. - 10/25/2007 5:07:00 PM

thegr81

Posts: 2639
Joined: 1/16/2007
From: PHOENIX,AZ
Status: offline

exactly removing emissions parts will really cost you big unless you are doing it for offroad only then it would have to be trailored to and from wherever you go.

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