The guys told me at Autozone that replacing O2 sensors was "routine maintanance" every 60K miles. I was under the impression that they only needed to be replaced when a CE light shot up, but they told me that I could expect to see a 2-3MPG improvement if they were really old and worn out. Can someone give some insight, because I don't want to waste money on them unless i have to. I did notice a raw gas smell comming from my exhaust after I gutted the cats, but I figured it was normal. They say it could be O2s.
Oxygen Sensors
- Thread starter WackyWRZ
- Start date
unstoppable
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RE: Oxygen Sensors
I would replace them If they have that many miles on them.Its good piece of mind.
I would replace them If they have that many miles on them.Its good piece of mind.
sleeper
Former LOD President
RE: Oxygen Sensors
Every now and then you need a torch to get them out. But they should come out with a little PB blaster. If they're not that tight you can just use a wrench to get them out. I took my the o2's off my exhaust with the exhaust out of the car. I soaked them in PB blaster for a few days and they came out with a wrench.
Someone posted about o2's the other day, someone said they got them as cheap as $45 i believe.
Every now and then you need a torch to get them out. But they should come out with a little PB blaster. If they're not that tight you can just use a wrench to get them out. I took my the o2's off my exhaust with the exhaust out of the car. I soaked them in PB blaster for a few days and they came out with a wrench.
Someone posted about o2's the other day, someone said they got them as cheap as $45 i believe.
RE: Oxygen Sensors
You really only need a jack and jackstands. When I had my exhaust down they look really easy to get to anyway. Also the tool, you can rent from Autozone for like $15, and they give your money back when you bring it back. Also about the O2 sensors, PM Chris about the $45 ones. BTW, thanks Chris!
You really only need a jack and jackstands. When I had my exhaust down they look really easy to get to anyway. Also the tool, you can rent from Autozone for like $15, and they give your money back when you bring it back. Also about the O2 sensors, PM Chris about the $45 ones. BTW, thanks Chris!
unstoppable
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RE: Oxygen Sensors
No problem.
No problem.
RE: Oxygen Sensors
Hi All
Been awhile since I have been around but with summer coming I should have more time...In answer to you question on O2 replacement, trade rule of thumb is, pre 96 every 60,000 mi and after 96 ,every 100,000 mi...Having said that it is important to note, that a perfectly working O2 can be triggered to make the engine burn more fuel than before by faulty engine conditions...an oil burning engine can coat the sensor causing sluggish reaction and improper fuel mixture, even minor oil burning..left unchecked can cause total failure..a fouled plug, an even slightly burned valve , a vacuum leak can all trigger a rich mixture from an O2, by adding more O2 to the exhaust than normal...One more interesting fact , an O2 needs heat to work ,650 deg. , until the O2 reaches that temp it causes the engine to run rich...Some O2s have heaters built in to hasten the warm up time, if your sensor has 3 or 4 wires it has a heater , If the heater burns out the sensor works normal , just takes longer to come to temp..Our sensors have 2 wires no heater so the exhaust must reach 650 deg before the sensor can operate properly...Here is the clinker , and I have this problem on my car with the headers, A free flowing exhaust takes longer to get to temp then one with some back pressure so it takes longer for the O2 to get to operating temp and work proprerly...I do a lot of highway driving with factory gears so engine rpm is very low .With the headers and free flow exhaust I think it is causing black soot in my tips from rich mix , caused by long heat up time on the O2...The reprogrammed chip settings may have overcompensated for lean condition expected from headers...My gas mileage is 20.7 but my tips are black inside .I didn't have the problem before exhaust, and chip mods , and the car runs well...I hope this answers you questions once and for all....
Hi All
Been awhile since I have been around but with summer coming I should have more time...In answer to you question on O2 replacement, trade rule of thumb is, pre 96 every 60,000 mi and after 96 ,every 100,000 mi...Having said that it is important to note, that a perfectly working O2 can be triggered to make the engine burn more fuel than before by faulty engine conditions...an oil burning engine can coat the sensor causing sluggish reaction and improper fuel mixture, even minor oil burning..left unchecked can cause total failure..a fouled plug, an even slightly burned valve , a vacuum leak can all trigger a rich mixture from an O2, by adding more O2 to the exhaust than normal...One more interesting fact , an O2 needs heat to work ,650 deg. , until the O2 reaches that temp it causes the engine to run rich...Some O2s have heaters built in to hasten the warm up time, if your sensor has 3 or 4 wires it has a heater , If the heater burns out the sensor works normal , just takes longer to come to temp..Our sensors have 2 wires no heater so the exhaust must reach 650 deg before the sensor can operate properly...Here is the clinker , and I have this problem on my car with the headers, A free flowing exhaust takes longer to get to temp then one with some back pressure so it takes longer for the O2 to get to operating temp and work proprerly...I do a lot of highway driving with factory gears so engine rpm is very low .With the headers and free flow exhaust I think it is causing black soot in my tips from rich mix , caused by long heat up time on the O2...The reprogrammed chip settings may have overcompensated for lean condition expected from headers...My gas mileage is 20.7 but my tips are black inside .I didn't have the problem before exhaust, and chip mods , and the car runs well...I hope this answers you questions once and for all....
unstoppable
Registered
RE: Oxygen Sensors
A side note, the ones I can get need the two little wings cut off of the wire plug.But its no big deal, their just little plastic alignment dealies.
A side note, the ones I can get need the two little wings cut off of the wire plug.But its no big deal, their just little plastic alignment dealies.
RE: Oxygen Sensors
Here is the link for the guy selling complete sets of new O2s for $65 (that's $16.25 each!!!) on Corral. A set of 2 (front or back) is $45.
http://www.corral.net/forums/showthread.php?s=&threadid=439754&perpage=35&pagenumber=1
I bought four and they look just like the picture. They look to be FORD NOS, 4 wire O2s. You might have to cut the two wings cut off the alignment plug, as described in an earlier post to this subject.
Mine were delivered within 5 days of my paypal payment.
Here is the link for the guy selling complete sets of new O2s for $65 (that's $16.25 each!!!) on Corral. A set of 2 (front or back) is $45.
http://www.corral.net/forums/showthread.php?s=&threadid=439754&perpage=35&pagenumber=1
I bought four and they look just like the picture. They look to be FORD NOS, 4 wire O2s. You might have to cut the two wings cut off the alignment plug, as described in an earlier post to this subject.
Mine were delivered within 5 days of my paypal payment.
unstoppable
Registered
RE: Oxygen Sensors
Thats the guy.I wanted to keep it to PMs so that no one would think I was advertising.Or I was trying to make a buck off the deal.I've bought 3 sets from him all were delivered on time.Yes you have to cut the little wings off, but they click into place and stay snug.
Thats the guy.I wanted to keep it to PMs so that no one would think I was advertising.Or I was trying to make a buck off the deal.I've bought 3 sets from him all were delivered on time.Yes you have to cut the little wings off, but they click into place and stay snug.
RE: Oxygen Sensors
Hey guys, just wanted to bump this back to the top and ask again if anyone knows what the diff would be between front and back on these sensors.
I accidentally bought 4 from the above guy on corral and only need two for my 93. I am trying to decide whether to try and install two of the ones I have and keep the remaining two for later, or is there a difference between what is needed for 93-95 vs 1996 and up? Does anybody have the set of two from this guy that they haven't installed yet to compare against?
The numbers stamped on them and plug colors are as follows:
XC2F-9F472-B2A GREEN (have a larger dia. sensor tip)
XR3F-9G444-B1A BLUE
Thanks,
Craig
http://www.corral.net/photopost/data/500/53844Hego_Sensors.jpg
Hey guys, just wanted to bump this back to the top and ask again if anyone knows what the diff would be between front and back on these sensors.
I accidentally bought 4 from the above guy on corral and only need two for my 93. I am trying to decide whether to try and install two of the ones I have and keep the remaining two for later, or is there a difference between what is needed for 93-95 vs 1996 and up? Does anybody have the set of two from this guy that they haven't installed yet to compare against?
The numbers stamped on them and plug colors are as follows:
XC2F-9F472-B2A GREEN (have a larger dia. sensor tip)
XR3F-9G444-B1A BLUE
Thanks,
Craig
http://www.corral.net/photopost/data/500/53844Hego_Sensors.jpg
RE: Oxygen Sensors
I got feedback from the dude I bought them from also saying go with green, as well as my bro who is a ford tech, he said the signal it sends may be a tad bit different but the computer won't be able to tell. Also, the metal end on the blue one is bigger around and stubbier if you look real close, so they are different. I guess the smaller one heats up faster, so it goes on front.
I got feedback from the dude I bought them from also saying go with green, as well as my bro who is a ford tech, he said the signal it sends may be a tad bit different but the computer won't be able to tell. Also, the metal end on the blue one is bigger around and stubbier if you look real close, so they are different. I guess the smaller one heats up faster, so it goes on front.