I am also looking at the NGK/NTK sensors. They seem to have the proper resistance of the heater and actually they seem to look identical to the OEM. So are they a definite 'yes' or 'no'?
New 02 Sensors = Mileage Increase
- Thread starter cary
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Jason Andrews
Modaholic
I need some imput here fellas. I replaced both O2's from Cdan. The nuts were so worn that they had shrunk to a size 8mm from 10mm? Tons of PB blaster or whatev but they were a SOB so I Ended up having to cut the pipes out to get at them.
My mileage is worse now. But got a decent 11mpg on the tank before this one...hmmm. I have tried taking the neg. batt cable off for a minute or two to allow it to reset with no positive results.
Any ideas are much appreciated.
My mileage is worse now. But got a decent 11mpg on the tank before this one...hmmm. I have tried taking the neg. batt cable off for a minute or two to allow it to reset with no positive results.
Any ideas are much appreciated.
maybe the old connectors going to the engine are corroded or did not contact well. I assume since you got it from Dan that they are factory OEM.
One thing I noticed too is that winter formula fuels that the gas company delivers generally gives me less MPG. I don't know if it true because I am warming the car a little more which might mislead me to believe this. This is one reason why your MPG might be down.
Did you get a good seal when you put the exhaust bat together? Any leaks before the o2's will make it run rich.
Why did you cut the exhaust out? That seams a little rash, you should have been able to deal with the rotten nuts in situ. Many have done so.
Why did you cut the exhaust out? That seams a little rash, you should have been able to deal with the rotten nuts in situ. Many have done so.
Prior to replacing my O2 sensors, I went out and bought the $50 Craftsman damaged nut extractor set. The nuts had reduced in size enough I was pretty sure the listed size extractor would not fit. It turns out the front and back sensors took two different size extractors, neither of which were the size listed as the correct size on the back of the box. I think I hit the nuts with PB Blaster a day prior, but I doubt that made any difference. With the extractors I had all 4 nuts off in a couple minutes (in conjunction with a flex head ratchet). I would not think of doing this job without them (or a similar tool). It keeps the simple job, simple. YRMV
My total list of tools was:
2 O2 sensors from Dan
4 stainless nuts and washers
1 3/8 flex ratchet
nut extractors (with appropriate socket on the top)
Anti-sieze for the new nuts
Wire brush to clean the gasket surface
A couple flat bladed screw drivers to remove the remains of the front gasket
John
PS It appears they are cheaper online.
http://www.sears.com/sr/javasr/prod...Bolt-Out,+Taps+&+Dies&vertical=TOOL&ihtoken=1
My total list of tools was:
2 O2 sensors from Dan
4 stainless nuts and washers
1 3/8 flex ratchet
nut extractors (with appropriate socket on the top)
Anti-sieze for the new nuts
Wire brush to clean the gasket surface
A couple flat bladed screw drivers to remove the remains of the front gasket
John
PS It appears they are cheaper online.
http://www.sears.com/sr/javasr/prod...Bolt-Out,+Taps+&+Dies&vertical=TOOL&ihtoken=1
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Jason Andrews
Modaholic
Yea, winter does that. I have been in Winter Park for a week and it was -20* at night. Early morning cold driving will take that effect. Well noted, thanks!
I had a leak before the 02's previous to the work being done that I could audibly notice. I havent checked for leaks because everything has been covered in snow and ice for over 3wks now.
I cut it out because I was only able to get one free and I have lived in Kansas prior to living in Denver and the humidity=rust, like Georgia, made it nearly impossible to free the other 3 while still on the truck. Yes, many have done so, you are right. But keep in mind most have much newer trucks than mine, I think mine was to the point of no return.
I will for sure.
I dont really need advice on how to do the job again,...it already done, but thanks. But for $100 I got my exhaust leak fixed too. I understand that it worked for you and you have a new tool to show for it and I have nothing, BUT you have a truck that is 5 years newer than mine. That makes alot of difference in the difficulty of completing this job.
I will keep you all updated when it doesnt snow once a week here and I can get back to normal driving and get better info to compare to previous MPG. Thanks
My tips were not directed at you because, as you noted, you are well past that point. Instead I'm hoping to ease the frustration of others who have yet to head down this path. Many members of this board have helped me directly, and more importantly, indirectly with their tips through various searches I have done. I try to pay those back when I can. Yep, your vehicle is older and nothing other than the steps you took may have worked in your case. Which is where the caveot "YRMV" in my post came from. Some will have to break out the torch.
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O2 Sensors - getting the heat shields off
I too bought a pair of O2 sensors from CDan - $200. Now I'm trying to get the heat shields off. Looks like a straightforward job after that. How long did it take you - any particular tips? Thanks
I too bought a pair of O2 sensors from CDan - $200. Now I'm trying to get the heat shields off. Looks like a straightforward job after that. How long did it take you - any particular tips? Thanks
The most common tip I've seen is to apply something like PB Blaster to help loosen the bolts. I think most are finding the bolts are beyond using the appropriate 13mm socket. You might be luckier being in AZ. My biggest tip is to have plan B when the 13mm socket mostly likely doesn't get the job done. (post 126)
The nuts on my 96 were in good shape and came right out, Joys of a southern cruiser, should be even better in AZ if your rig spent its whole life there, I did spend some time cleaning off the seats to they would make a good seal. Better set aside at least an afternoon if you run into rotten nuts.
NaterGator
On Gilligan's Island
If the nuts are stuck at first, definitely hit them with heat and whack them a bit to see if they will break free.
02 Sensors
The heat shields that are the problem. Blasted them, heated them, but they appear to be stuck. Some will rotate, which would be fine if I could get the wrench or socket on both sides, but space is the problem. Not so worried about the #12's on the sensors themselves, just the little #10's on the #@%*?!! heat shields. Someone suggested just bending them back, but kinda reluctant to do that just yet.
The heat shields that are the problem. Blasted them, heated them, but they appear to be stuck. Some will rotate, which would be fine if I could get the wrench or socket on both sides, but space is the problem. Not so worried about the #12's on the sensors themselves, just the little #10's on the #@%*?!! heat shields. Someone suggested just bending them back, but kinda reluctant to do that just yet.
OK - now I am really stuck. I removed the heat shield for the CAT - no problem. I even loosened the shields on the exhaust - but don't think that gives me a lot of extra room to work with. The problem for me is how to manouver around the little palm-sized shields on the sensor itself, and more importantly how you get to the sensor without removing the whole manifold. Am I missing something really basic? HELP!
I am about to do this as my milage has been decreasing steadily for about two months. I am down to 9.0 mpg with an 80% freeway cruise.
Has anyone had any success using non-OEM sensors in their 93-94 80s......and which ones?
I've been through this whole thread ......twice, and have not found an answer.
Lots of surfing and searching and still no solid answers. NTK, bosch, and others say they make them but prices vary too much to be true,
some say they are both the same, although I know they are different.
One codes as the "post cat sensor" the other as just "main sensor" ( both are in front of the cat) but obviously set up diff for these two years.
toyota OEM sensors are the obvious solution......Cdan and I have a love/hate relationship ( i would love to get parts from him but the UPS Broker/Gouger takes my smart shopper discount.....thats the hate part)
I will be getting a price for a pair from local Toyota dealer on Monday...pretty sure it will be way up there as every thing 80 is coming from cali.
I've been through this whole thread ......twice, and have not found an answer.
Lots of surfing and searching and still no solid answers. NTK, bosch, and others say they make them but prices vary too much to be true,
some say they are both the same, although I know they are different.
One codes as the "post cat sensor" the other as just "main sensor" ( both are in front of the cat) but obviously set up diff for these two years.
toyota OEM sensors are the obvious solution......Cdan and I have a love/hate relationship ( i would love to get parts from him but the UPS Broker/Gouger takes my smart shopper discount.....thats the hate part)
I will be getting a price for a pair from local Toyota dealer on Monday...pretty sure it will be way up there as every thing 80 is coming from cali.
And how exactly do you plan on removing the old ones?
Guys - please help with my question if you can. Do you have to remove the manifold to remove the old sensors? I can't see any other way to get at them given the space.I've been at this since yesterday - and thought it was a 2 hour job!
