emission , oxygen senor

I finally bought 2nd Oxygen Sensor (Downflow) for $79 cuz the auto part did not call me when part arrived and they sent back to the warehouse when I came. It was my 3rd visit and finally got it but on the very day I bought sensor, my engine check light went off!!?? Strange. I am going to hold it for a week if the engine light doesn't lit on, then I'm returning it back to store for refund...

The Upflow oxygen sensor was installed last month and it was a hard work because the male and female jack doesn't connect in a tight spot which I had to use one hand to snap it together (tricky isn't it) and it turned out that the male jack had "offset" "rail" that prevent me from lining up to female jack. I had to grind it off and finally got it connected! Took me nearly hour and half..

I can always purchase again if engine check light stays on again..

I did use voltmeter to measure OHM and it doesn't tell anything if it's bad or not. I did compare old and new oxygen sensors.. I have 4 pins in Oxygen Sensor, two Black wires are ground and one White and One Blue.. I already tried testing and cross testing the pins. None avail. Am I missing something??

Catty
 
deafsmogtech said:
Hey, I heard about PicoScope in Motor Age magazine. 2 or 4 channel? I'm thinking to buy 4 channel PicoScope. I currently own my 2 Fluke #88 DVOMs and #98-II scopemeter and old SnapON scanner MT2500 updated to 2001. I need to update my vintage scanner and scopemeter by purchase new high
tech diagnostic equipments like your PicoScope and other PC OBD-II softwares I'm a master technician at 76 gas station, hold ASE MASTER TECH AND L1 certs and licensed smog check technician.
Click to expand...

No, I don't own PicoScope but I wish and I currently own Fluke 87. Fluke rocks!
ASE Master... very nice... How long you master technician since?
 
The Highlander said:
No, I don't own PicoScope but I wish and I currently own Fluke 87. Fluke rocks!
ASE Master... very nice... How long you master technician since?
Click to expand...
Since 1993. I landed a mechanic job in 1990 after spend 13 years in automotive machinist ( most on crankshaft grinder). I first tasted car when I was about 5 yrs old and saw my 2 uncles who worked on my mom's car. I escaped from house to watching them. My older uncle gave me a new Clinton repair manual. I was looking at the pictures of removal/installment procedures, and keep it till my early teenager day, I began to reading the automotive repair languages over over. (I still have it in my garage). I was anxiety to tear down and studied lawnmower engines. On my HS senior day, I landed part time job at the engine rebuilding company as crankshaft polisher
and became full time grinder after HS graduate, continued to 1989. During mechanic job, I pursuit to studied smog to obtain a license in 1994.
 
purplecatty said:
I finally bought 2nd Oxygen Sensor (Downflow) for $79 cuz the auto part did not call me when part arrived and they sent back to the warehouse when I came. It was my 3rd visit and finally got it but on the very day I bought sensor, my engine check light went off!!?? Strange. I am going to hold it for a week if the engine light doesn't lit on, then I'm returning it back to store for refund...

The Upflow oxygen sensor was installed last month and it was a hard work because the male and female jack doesn't connect in a tight spot which I had to use one hand to snap it together (tricky isn't it) and it turned out that the male jack had "offset" "rail" that prevent me from lining up to female jack. I had to grind it off and finally got it connected! Took me nearly hour and half..

I can always purchase again if engine check light stays on again..

I did use voltmeter to measure OHM and it doesn't tell anything if it's bad or not. I did compare old and new oxygen sensors.. I have 4 pins in Oxygen Sensor, two Black wires are ground and one White and One Blue.. I already tried testing and cross testing the pins. None avail. Am I missing something??

Catty
Click to expand...
I suspect there is something wrong with your voltmeter to test OHMS. Are you sure that you select OHMS or something. Ok probe leads to BLK and WHT of O2S, the spec is around 30 to 60 OHMS depend on ambiet temp. If
nothing, replace it. Make sure your meter is working or re calibration.
 
deafsmogtech said:
I suspect there is something wrong with your voltmeter to test OHMS. Are you sure that you select OHMS or something. Ok probe leads to BLK and WHT of O2S, the spec is around 30 to 60 OHMS depend on ambiet temp. If
nothing, replace it. Make sure your meter is working or re calibration.
Click to expand...

Maybe it could be my voltmeter problem. It had low battery warning icon on it. I did use Ohm at the lowest Ohm setting.

I will try again and see if I can get the reading off of this.

Catty
 
purplecatty said:
Maybe it could be my voltmeter problem. It had low battery warning icon on it. I did use Ohm at the lowest Ohm setting.

I will try again and see if I can get the reading off of this.

Catty
Click to expand...

Auto OHMS is very easy and quick like Fluke.
 
deafsmogtech said:
Since 1993. I landed a mechanic job in 1990 after spend 13 years in automotive machinist ( most on crankshaft grinder). I first tasted car when I was about 5 yrs old and saw my 2 uncles who worked on my mom's car. I escaped from house to watching them. My older uncle gave me a new Clinton repair manual. I was looking at the pictures of removal/installment procedures, and keep it till my early teenager day, I began to reading the automotive repair languages over over. (I still have it in my garage). I was anxiety to tear down and studied lawnmower engines. On my HS senior day, I landed part time job at the engine rebuilding company as crankshaft polisher
and became full time grinder after HS graduate, continued to 1989. During mechanic job, I pursuit to studied smog to obtain a license in 1994.
Click to expand...

Interesting story. I am rookie for gasoline and diesel engine for mechanic. Just learned how to use scope for analog/digital trigger (hall-effect, magnetic sensor and optical DIS) and ignition (camshaft sensor and CKP sensor)
 
The Highlander said:
Auto OHMS is very easy and quick like Fluke.
Click to expand...

I wish I do! :lol:

I shoulda bought one long time ago.

I have 4 voltmeters already on my workbench. 2 of them had dead battery, one is low on battery, and other is Analog. You probably saw on my post #55

Catty
 
The Highlander said:
Interesting story. I am rookie for gasoline and diesel engine for mechanic. Just learned how to use scope for analog/digital trigger (hall-effect, magnetic sensor and optical DIS) and ignition (camshaft sensor and CKP sensor)
Click to expand...

wow, you still attend school or work full time? I love to see someone or you to become a professional technician like mine. I guess you are younger. Why don't you take ASE exams to obtain certification? I don't know how many deaf technicians in US, hold ASE certs or smog licenses.
 
deafsmogtech said:
wow, you still attend school or work full time? I love to see someone or you to become a professional technician like mine. I guess you are younger. Why don't you take ASE exams to obtain certification? I don't know how many deaf technicians in US, hold ASE certs or smog licenses.
Click to expand...

Student full time and work part time. I plan to take ASE exams after I understand everything first. I already have few certification so far.

I just wonder..I know you are deaf but you can heard anything from engine or communication to customer or whatever you can do it. I had to write down on the paper to communication to hearing people all in my life.
 
The Highlander said:
Student full time and work part time. I plan to take ASE exams after I understand everything first. I already have few certification so far.

I just wonder..I know you are deaf but you can heard anything from engine or communication to customer or whatever you can do it. I had to write down on the paper to communication to hearing people all in my life.
Click to expand...
Noises are not my problem, chuckle... well my hearing techs will sign me in body lanuage what they hear noiseness. If I pick up RO invoice, see word "KNOCKING" noise, then turn RO paper over to the hearing techs. I still write a note to communicate with staffs and crews also customers too. I test the vehicle on the dyno, my techs will come to close to listen the noiseness. Why? They want money. They always inform me abt the noiseness. I tell them this paper(RO) doesn't say any noises. Noises are hearing people's plm not me.
 
purplecatty said:
Durango's exhaust pipe from both Manifolds is like "y", so It use one exhaust pipe after the bottom of "y".

If it has a separate exhaust pipes, That explains why Tundra have 4 of them. See my pix of Oxygen Sensors on Durango's Catalyst Converter, you can see one on top and bottom. So given an idea that Tundra's separate exhaust system would require 4 (2 of each).

Make sense?

If anyone have Tundra or maybe quickly find Tundra out in parking lot and spy on what's under it. Tell us later after you're done. Hope you don't get arrested by cops :giggle:

PS: What puzzled me that Durango only have one Catalyst Converter on one end connected to one Exhaust manifold and pipe go to middle of "y"and other Manifold end to pipe is straight to exhaust pipe. Chrystler is taking shortcuts.. I think I found the violation of smog law :giggle:

PSII: Durango's muffer look like it is almost 4 ft long and 2 ft wide!?? :eek2: No kidding. Be happy to post pix with measure tape if you don't believe me.

Catty
Click to expand...
you mean another cat converter is missing? Is it a 2005 Durango?
 
deafsmogtech said:
you mean another cat converter is missing? Is it a 2005 Durango?
Click to expand...

hey you can tell how many cat converters and O2S or HO2S in emission system of the vehicle by look up VECI label stick on radiator support or under the hood or firewall. TWC or WU-TWC on the label is cat converters.
 
deafsmogtech said:
you mean another cat converter is missing? Is it a 2005 Durango?
Click to expand...

I took a deeper view on left side (facing front of engine to know which left or right) of Durango with Blackberry camera w/flash and found Cat converter and indeed have oxygen sensor on "downflow" section. I must have overlooked cuz it was dark under the truck. So it's not missing.. It's connected next to exhaust manifold by several inches shorter than right side (no wonder it's short). That explained why I didn't see it further except for exhaust pipe directly connected to muffler. So It turned out my durango have 3 oxygen sensor instead of 2. I realized that I plugged the grey socket (left handed side OxSensor) to black input socket (for right handed side OxSensor) which I grinded the grey socket "offset rail" off to fit black socket for oxygen sensor. It make no difference cuz it"s just the same oxygen sensor on either side with different socket color but works the same. The right side have grey to grey socket so I would get 2nd one and replace it.. I guess I will have to swap it to correct place and get the left side "upflow" Oxygen Sensor with black socket. Ooopsie hee hee. It's no biggie cuz it's basically a same sensor with different color socket. (Right side sensor wires have 2 black ground and 1 blue and 1 white while the Left side have two white wire and two black wires)

Hence, Durango have 3 oxygen sensors!

My gaffe :crazy:

Catty
 
Last edited:
purplecatty said:
I took a deeper view on left side (facing front of engine to know which left or right) of Durango with Blackberry camera w/flash and found Cat converter and indeed have oxygen sensor on "downflow" section. I must have overlooked cuz it was dark under the truck. So it's not missing.. It's connected next to exhaust manifold by several inches shorter than right side (no wonder it's short). That explained why I didn't see it further except for exhaust pipe directly connected to muffler. So It turned out my durango have 3 oxygen sensor instead of 2. I realized that I plugged the grey socket (left handed side OxSensor) to black input socket (for right handed side OxSensor) which I grinded the grey socket "offset rail" off to fit black socket for oxygen sensor. It make no difference cuz it"s just the same oxygen sensor on either side with different socket color but works the same. The right side have grey to grey socket so I would get 2nd one and replace it.. I guess I will have to swap it to correct place and get the left side "upflow" Oxygen Sensor with black socket. Ooopsie hee hee. It's no biggie cuz it's basically a same sensor with different color socket. (Right side sensor wires have 2 black ground and 1 blue and 1 white while the Left side have two white wire and two black wires)

Hence, Durango have 3 oxygen sensors!

My gaffe :crazy:

Catty
Click to expand...
I still dont know why some SUVs or light trucks use mega mufflers. Ultra quieter?? Maybe the mega muffler design to reduce rattle exhaust pipes or vibration.
 
deafsmogtech said:
I still dont know why some SUVs or light trucks use mega mufflers. Ultra quieter?? Maybe the mega muffler design to reduce rattle exhaust pipes or vibration.
Click to expand...

Maybe engine with high torque like suvs and trucks cause loud so use mega muffler?
 
Back
Top