Oxygen sensor

Reply
 
LinkBack Thread Tools Display Modes
Old 19 Jun 2009, 12:14 pm   #1 (permalink)
RD
Guest
  • Posts: n/a
  • User Status:


Default Oxygen sensor

1995 Camry - 300K

My fuel economy is not what it should be with poor responsiveness. I don't
have a check engine light but I am wondering if the oxygen sensor is not
performing as it should. How is it checked? Coiuld I have another issue?


  Reply With Quote
Old 20 Jun 2009, 01:37 am   #2 (permalink)
john
Guest
  • Posts: n/a
  • User Status:


Default Re: Oxygen sensor

That's a lot of miles and with it there will be wear and tear cutting
down on efficiency. Oxygen sensors, like spark plugs, are wear items.
They deteriorate from minute amounts of sulfur and other contaminants
in oil and gas. It's not clear if the sensors are the only reason.
There may be others like valve clearance, ring/bearing/piston wear,
etc.

95 is very close to the 1996 OBD-II requirement date. You may or may
not have OBD-II. If you do, then better scanners will be able to show
you oxygen sensor waveforms. You can do snap-throttle test, propane
enrichment test, etc to check out the sensors. But these are very
rough methods, and I don't know, maybe they're good enough.

But with best-in-class Bosch planar sensors about $60+shipping
(rockauto.com), replacing them may be more cost effective. That is if
the engine is already well tuned. I'd avoid old thimbles whenever
possible.

http://www.boschautoparts.com/Produc...nsors/PlanarO2




On Jun 19, 10:14*am, "RD" <dosvader2...@hotmail.com> wrote:
> 1995 Camry - 300K
>
> My fuel economy is not what it should be with poor responsiveness. I don't
> have a check engine light but I am wondering if the oxygen sensor is not
> performing as it should. How is it checked? Coiuld I have another issue?


  Reply With Quote
Old 20 Jun 2009, 08:13 pm   #3 (permalink)
ransley
Guest
  • Posts: n/a
  • User Status:


Default Re: Oxygen sensor

On Jun 19, 12:14*pm, "RD" <dosvader2...@hotmail.com> wrote:
> 1995 Camry - 300K
>
> My fuel economy is not what it should be with poor responsiveness. I don't
> have a check engine light but I am wondering if the oxygen sensor is not
> performing as it should. How is it checked? Coiuld I have another issue?


300000 miles or kilometers. At that many miles there is alot of wear,
a compression test should be done to see how much real life is left.
Sure the 02 sensor can be bad, does it have a distributor so you can
adjust timing, retarded timing cut my mpg by 4 on an older camry.
When was last tune up, it all matters on a 4 cil. If its 300000 miles,
its worn and will be slower.
  Reply With Quote
Old 23 Jun 2009, 12:14 pm   #4 (permalink)
RD
Guest
  • Posts: n/a
  • User Status:


Default Re: Oxygen sensor

Thanks guys,
Compression test was right up were it was supposed to be, can't remember
exact numbers.
Just changed out timing belt, water and oil pump and plugs. No change.


"ransley" <Mark_Ransley@Yahoo.com> wrote in message
news:42e4c74d-5d01-4a25-b4d1-f9b5356d24e9@l8g2000vbp.googlegroups.com...
On Jun 19, 12:14 pm, "RD" <dosvader2...@hotmail.com> wrote:
> 1995 Camry - 300K
>
> My fuel economy is not what it should be with poor responsiveness. I don't
> have a check engine light but I am wondering if the oxygen sensor is not
> performing as it should. How is it checked? Coiuld I have another issue?


300000 miles or kilometers. At that many miles there is alot of wear,
a compression test should be done to see how much real life is left.
Sure the 02 sensor can be bad, does it have a distributor so you can
adjust timing, retarded timing cut my mpg by 4 on an older camry.
When was last tune up, it all matters on a 4 cil. If its 300000 miles,
its worn and will be slower.


  Reply With Quote
Old 24 Jun 2009, 06:48 am   #5 (permalink)
ransley
Guest
  • Posts: n/a
  • User Status:


Default Re: Oxygen sensor

On Jun 23, 12:14*pm, "RD" <dosvader2...@hotmail.com> wrote:
> Thanks guys,
> Compression test was right up were it was supposed to be, can't remember
> exact numbers.
> Just changed out timing belt, water and oil pump and plugs. No change.
>
> "ransley" <Mark_Rans...@Yahoo.com> wrote in message
>
> news:42e4c74d-5d01-4a25-b4d1-f9b5356d24e9@l8g2000vbp.googlegroups.com...
> On Jun 19, 12:14 pm, "RD" <dosvader2...@hotmail.com> wrote:
>
> > 1995 Camry - 300K

>
> > My fuel economy is not what it should be with poor responsiveness. I don't
> > have a check engine light but I am wondering if the oxygen sensor is not
> > performing as it should. How is it checked? Coiuld I have another issue?

>
> 300000 miles or kilometers. At that many miles there is alot of wear,
> a compression test should be done to see how much real life is left.
> Sure the 02 sensor can be bad, does it have a distributor so you can
> adjust timing, *retarded timing cut my mpg by 4 on an older camry.
> When was last tune up, it all matters on a 4 cil. If its 300000 miles,
> its worn and will be slower.


Double ckeck Timing, 1 degree off will mean 1 less mpg and less
power. how about a clogged converter, any good tech with a good scope
should be able to tell whats up, and thats for timing also incase it
doesnt advance right. How often do you change tranny and Differential
oil, I use Mobil synthetic and notice a power difference, you checked
how wheels spin freely from a rack? What is spark color it could be a
weak coil.
  Reply With Quote
Old 25 Jun 2009, 02:56 pm   #6 (permalink)
RD
Guest
  • Posts: n/a
  • User Status:


Default Re: Oxygen sensor

Sounds like enough to check for now - thanks


"ransley" <Mark_Ransley@Yahoo.com> wrote in message
news:38eb0308-0593-45c6-aaea-93eaa7939e0d@l28g2000vba.googlegroups.com...
On Jun 23, 12:14 pm, "RD" <dosvader2...@hotmail.com> wrote:
> Thanks guys,
> Compression test was right up were it was supposed to be, can't remember
> exact numbers.
> Just changed out timing belt, water and oil pump and plugs. No change.
>
> "ransley" <Mark_Rans...@Yahoo.com> wrote in message
>
> news:42e4c74d-5d01-4a25-b4d1-f9b5356d24e9@l8g2000vbp.googlegroups.com...
> On Jun 19, 12:14 pm, "RD" <dosvader2...@hotmail.com> wrote:
>
> > 1995 Camry - 300K

>
> > My fuel economy is not what it should be with poor responsiveness. I
> > don't
> > have a check engine light but I am wondering if the oxygen sensor is not
> > performing as it should. How is it checked? Coiuld I have another issue?

>
> 300000 miles or kilometers. At that many miles there is alot of wear,
> a compression test should be done to see how much real life is left.
> Sure the 02 sensor can be bad, does it have a distributor so you can
> adjust timing, retarded timing cut my mpg by 4 on an older camry.
> When was last tune up, it all matters on a 4 cil. If its 300000 miles,
> its worn and will be slower.


Double ckeck Timing, 1 degree off will mean 1 less mpg and less
power. how about a clogged converter, any good tech with a good scope
should be able to tell whats up, and thats for timing also incase it
doesnt advance right. How often do you change tranny and Differential
oil, I use Mobil synthetic and notice a power difference, you checked
how wheels spin freely from a rack? What is spark color it could be a
weak coil.


  Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 10:00 am.

Attribution:
Autoblog
Powered by Yahoo Answers



ToyotaLexusForum.com is an unofficial community for car enthusiasts. ToyotaLexusForum.com is not affiliated with Toyota Motor Corporation in any way.
Toyota Motor Corporation does not sponsor, support, or endorse ToyotaLexusForum.com in any way.
Copyright/trademark/sales mark infringements are not intended or implied.