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-   -   Grand Cherokee 2000 getting Extremely bad millage @ 14.5MPG from 17.5MPG within 1 month. (https://www.jeepscanada.com/jeep-mailing-list-32/grand-cherokee-2000-getting-extremely-bad-millage-%40-14-5mpg-17-5mpg-within-1-month-48729/)

DougW 09-19-2007 09:52 PM

Re: Grand Cherokee 2000 getting Extremely bad millage @ 14.5MPG from 17.5MPG within 1 month.
 
"reboot" wrote ...

> to my knowledge there isn't a good way to diagnose them as a
> component, maybe the scan will tell you if you need to replace all
> three, my guess is that at least the two upstream sensors should be
> replaced.


Yea.. I forgot the clip on the side of the I6 is notorious for
pinching and melting the O2 sensor.

As for testing, you can do it with a torch and possibly with the DRB,
but there isn't any real good test for a lazy sensor.

while back I connected my scope to the sensor and pulled a few waveforms.
...and all I can find on my compooter is sparkplug waves... :(
bah. Wonder where I saved those...

--
DougW



DougW 09-19-2007 09:52 PM

Re: Grand Cherokee 2000 getting Extremely bad millage @ 14.5MPG from 17.5MPG within 1 month.
 
"reboot" wrote ...

> to my knowledge there isn't a good way to diagnose them as a
> component, maybe the scan will tell you if you need to replace all
> three, my guess is that at least the two upstream sensors should be
> replaced.


Yea.. I forgot the clip on the side of the I6 is notorious for
pinching and melting the O2 sensor.

As for testing, you can do it with a torch and possibly with the DRB,
but there isn't any real good test for a lazy sensor.

while back I connected my scope to the sensor and pulled a few waveforms.
...and all I can find on my compooter is sparkplug waves... :(
bah. Wonder where I saved those...

--
DougW



DougW 09-19-2007 09:52 PM

Re: Grand Cherokee 2000 getting Extremely bad millage @ 14.5MPG from 17.5MPG within 1 month.
 
"reboot" wrote ...

> to my knowledge there isn't a good way to diagnose them as a
> component, maybe the scan will tell you if you need to replace all
> three, my guess is that at least the two upstream sensors should be
> replaced.


Yea.. I forgot the clip on the side of the I6 is notorious for
pinching and melting the O2 sensor.

As for testing, you can do it with a torch and possibly with the DRB,
but there isn't any real good test for a lazy sensor.

while back I connected my scope to the sensor and pulled a few waveforms.
...and all I can find on my compooter is sparkplug waves... :(
bah. Wonder where I saved those...

--
DougW



Some Guy 09-19-2007 11:56 PM

Re: Grand Cherokee 2000 getting Extremely bad millage @ 14.5MPG from17.5MPG within 1 month.
 
wilsonb wrote:
> On Sep 19, 1:39 am, "L.W. \(Bill\) ------ III"
> <LWBillHug...@------.net> wrote:
>> Don't tell me, let me guess, you buy your auto parts at Cut Rate? YOur
>> hair blonde, too?
>> God Bless America, Bill O|||||||O
>> mailto:LW------...@aol.comhttp://www.----------.com/
>>
>> "wilsonb" <wilsonbrad...@gmail.com> wrote in message
>>

>
> I guess so... because I don't get your useless response.
>


You'll find that everything Bill says is useless. 99% of the newsgroup
has already killfilled him. You should, too, if you want to enjoy the
group without problems. Just disagree with him a couple of times and
watch him call you a queer or something; you'll see that I'm giving you
good advice here.

Some Guy 09-19-2007 11:56 PM

Re: Grand Cherokee 2000 getting Extremely bad millage @ 14.5MPG from17.5MPG within 1 month.
 
wilsonb wrote:
> On Sep 19, 1:39 am, "L.W. \(Bill\) ------ III"
> <LWBillHug...@------.net> wrote:
>> Don't tell me, let me guess, you buy your auto parts at Cut Rate? YOur
>> hair blonde, too?
>> God Bless America, Bill O|||||||O
>> mailto:LW------...@aol.comhttp://www.----------.com/
>>
>> "wilsonb" <wilsonbrad...@gmail.com> wrote in message
>>

>
> I guess so... because I don't get your useless response.
>


You'll find that everything Bill says is useless. 99% of the newsgroup
has already killfilled him. You should, too, if you want to enjoy the
group without problems. Just disagree with him a couple of times and
watch him call you a queer or something; you'll see that I'm giving you
good advice here.

Some Guy 09-19-2007 11:56 PM

Re: Grand Cherokee 2000 getting Extremely bad millage @ 14.5MPG from17.5MPG within 1 month.
 
wilsonb wrote:
> On Sep 19, 1:39 am, "L.W. \(Bill\) ------ III"
> <LWBillHug...@------.net> wrote:
>> Don't tell me, let me guess, you buy your auto parts at Cut Rate? YOur
>> hair blonde, too?
>> God Bless America, Bill O|||||||O
>> mailto:LW------...@aol.comhttp://www.----------.com/
>>
>> "wilsonb" <wilsonbrad...@gmail.com> wrote in message
>>

>
> I guess so... because I don't get your useless response.
>


You'll find that everything Bill says is useless. 99% of the newsgroup
has already killfilled him. You should, too, if you want to enjoy the
group without problems. Just disagree with him a couple of times and
watch him call you a queer or something; you'll see that I'm giving you
good advice here.

Some Guy 09-19-2007 11:56 PM

Re: Grand Cherokee 2000 getting Extremely bad millage @ 14.5MPG from17.5MPG within 1 month.
 
wilsonb wrote:
> On Sep 19, 1:39 am, "L.W. \(Bill\) ------ III"
> <LWBillHug...@------.net> wrote:
>> Don't tell me, let me guess, you buy your auto parts at Cut Rate? YOur
>> hair blonde, too?
>> God Bless America, Bill O|||||||O
>> mailto:LW------...@aol.comhttp://www.----------.com/
>>
>> "wilsonb" <wilsonbrad...@gmail.com> wrote in message
>>

>
> I guess so... because I don't get your useless response.
>


You'll find that everything Bill says is useless. 99% of the newsgroup
has already killfilled him. You should, too, if you want to enjoy the
group without problems. Just disagree with him a couple of times and
watch him call you a queer or something; you'll see that I'm giving you
good advice here.

Some Guy 09-19-2007 11:59 PM

Re: Grand Cherokee 2000 getting Extremely bad millage @ 14.5MPG from17.5MPG within 1 month.
 
L.W. (Bill) ------ III wrote:
> Then get the spark plugs your engine calls for. Champions!


Champions are crappy spark plugs, Bill.

See Wilson, I told you everything Bill says is useless.

> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
>
> "wilsonb" <wilsonbradley@gmail.com> wrote in message
> news:1190220047.785492.290860@g4g2000hsf.googlegro ups.com...
>> I guess so... because I don't get your useless response.
>>

>
>
>


Some Guy 09-19-2007 11:59 PM

Re: Grand Cherokee 2000 getting Extremely bad millage @ 14.5MPG from17.5MPG within 1 month.
 
L.W. (Bill) ------ III wrote:
> Then get the spark plugs your engine calls for. Champions!


Champions are crappy spark plugs, Bill.

See Wilson, I told you everything Bill says is useless.

> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
>
> "wilsonb" <wilsonbradley@gmail.com> wrote in message
> news:1190220047.785492.290860@g4g2000hsf.googlegro ups.com...
>> I guess so... because I don't get your useless response.
>>

>
>
>


Some Guy 09-19-2007 11:59 PM

Re: Grand Cherokee 2000 getting Extremely bad millage @ 14.5MPG from17.5MPG within 1 month.
 
L.W. (Bill) ------ III wrote:
> Then get the spark plugs your engine calls for. Champions!


Champions are crappy spark plugs, Bill.

See Wilson, I told you everything Bill says is useless.

> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
>
> "wilsonb" <wilsonbradley@gmail.com> wrote in message
> news:1190220047.785492.290860@g4g2000hsf.googlegro ups.com...
>> I guess so... because I don't get your useless response.
>>

>
>
>



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