would an exhaust leak cause lean or rich sensor reading?
12-28-2003, 04:55 PM
#21
Guest
Posts: n/a
Re: would an exhaust leak cause lean or rich sensor reading?
Nick N wrote:
> Simon, I just had this problem. I had a bad leak before the o2 sensor and
> my engine ran increadibly rich. It was mis-firing and failed emissions
> badly. I just had the leak fixed and my Jeep now runs great as a direct
> result.
> Nick
I've got a minor leak (or leaks), once it's warmed it runs like a clock
so I'm thinking the leaks are worse when it's really cold; causing or
contributing to it running really rich at startup.
--
Simon
"I may be wrong, but I'm not uncertain." -- Robert A. Heinlein
> Simon, I just had this problem. I had a bad leak before the o2 sensor and
> my engine ran increadibly rich. It was mis-firing and failed emissions
> badly. I just had the leak fixed and my Jeep now runs great as a direct
> result.
> Nick
I've got a minor leak (or leaks), once it's warmed it runs like a clock
so I'm thinking the leaks are worse when it's really cold; causing or
contributing to it running really rich at startup.
--
Simon
"I may be wrong, but I'm not uncertain." -- Robert A. Heinlein
12-28-2003, 04:55 PM
#22
Guest
Posts: n/a
Re: would an exhaust leak cause lean or rich sensor reading?
Nick N wrote:
> Simon, I just had this problem. I had a bad leak before the o2 sensor and
> my engine ran increadibly rich. It was mis-firing and failed emissions
> badly. I just had the leak fixed and my Jeep now runs great as a direct
> result.
> Nick
I've got a minor leak (or leaks), once it's warmed it runs like a clock
so I'm thinking the leaks are worse when it's really cold; causing or
contributing to it running really rich at startup.
--
Simon
"I may be wrong, but I'm not uncertain." -- Robert A. Heinlein
> Simon, I just had this problem. I had a bad leak before the o2 sensor and
> my engine ran increadibly rich. It was mis-firing and failed emissions
> badly. I just had the leak fixed and my Jeep now runs great as a direct
> result.
> Nick
I've got a minor leak (or leaks), once it's warmed it runs like a clock
so I'm thinking the leaks are worse when it's really cold; causing or
contributing to it running really rich at startup.
--
Simon
"I may be wrong, but I'm not uncertain." -- Robert A. Heinlein
12-28-2003, 05:18 PM
#23
Guest
Posts: n/a
Re: would an exhaust leak cause lean or rich sensor reading?
Dave wrote:
> HMMMM
> AFAIK the 02 sensors are heated so they come online sooner (closed loop
> happens faster) and possibly before the engine warms up. I am not 100% sure
> with the Jeeps though and have not timed mine....yet! :-)
Took me a sec to get what you were getting at until I saw what you
quoted. I've got Mr. -------- filtered. One of the symptoms was that it
idles fine for bit and then gets rough, like possibly when the computer
starts using the O2 input. Anyone know how long roughly it takes for the
ECU to go to closed loop?
> "bllsht" <nospam@invaliddot.net> wrote in message
> news:v8ctuv0vent44g1cc4372jk2vo73k4khjs@4ax.com...
> > The O2 sensor is ignored until the engine is warmed up, junior.
-------- are you locked up in your parents garage with your computer?
You don't seem comfortable or familiar with interacting with real
people. You strike me as one of those geeks who uses the anonymity of
the internet as an opportunity to act like an ***. If you're an actual
mechanic I feel sorry for anyone who brings their vehicles to you, but
of course you don't act like this to them, you need the anonymity to
make you bold.
--
Simon
"I may be wrong, but I'm not uncertain." -- Robert A. Heinlein
> HMMMM
> AFAIK the 02 sensors are heated so they come online sooner (closed loop
> happens faster) and possibly before the engine warms up. I am not 100% sure
> with the Jeeps though and have not timed mine....yet! :-)
Took me a sec to get what you were getting at until I saw what you
quoted. I've got Mr. -------- filtered. One of the symptoms was that it
idles fine for bit and then gets rough, like possibly when the computer
starts using the O2 input. Anyone know how long roughly it takes for the
ECU to go to closed loop?
> "bllsht" <nospam@invaliddot.net> wrote in message
> news:v8ctuv0vent44g1cc4372jk2vo73k4khjs@4ax.com...
> > The O2 sensor is ignored until the engine is warmed up, junior.
-------- are you locked up in your parents garage with your computer?
You don't seem comfortable or familiar with interacting with real
people. You strike me as one of those geeks who uses the anonymity of
the internet as an opportunity to act like an ***. If you're an actual
mechanic I feel sorry for anyone who brings their vehicles to you, but
of course you don't act like this to them, you need the anonymity to
make you bold.
--
Simon
"I may be wrong, but I'm not uncertain." -- Robert A. Heinlein
12-28-2003, 05:18 PM
#24
Guest
Posts: n/a
Re: would an exhaust leak cause lean or rich sensor reading?
Dave wrote:
> HMMMM
> AFAIK the 02 sensors are heated so they come online sooner (closed loop
> happens faster) and possibly before the engine warms up. I am not 100% sure
> with the Jeeps though and have not timed mine....yet! :-)
Took me a sec to get what you were getting at until I saw what you
quoted. I've got Mr. -------- filtered. One of the symptoms was that it
idles fine for bit and then gets rough, like possibly when the computer
starts using the O2 input. Anyone know how long roughly it takes for the
ECU to go to closed loop?
> "bllsht" <nospam@invaliddot.net> wrote in message
> news:v8ctuv0vent44g1cc4372jk2vo73k4khjs@4ax.com...
> > The O2 sensor is ignored until the engine is warmed up, junior.
-------- are you locked up in your parents garage with your computer?
You don't seem comfortable or familiar with interacting with real
people. You strike me as one of those geeks who uses the anonymity of
the internet as an opportunity to act like an ***. If you're an actual
mechanic I feel sorry for anyone who brings their vehicles to you, but
of course you don't act like this to them, you need the anonymity to
make you bold.
--
Simon
"I may be wrong, but I'm not uncertain." -- Robert A. Heinlein
> HMMMM
> AFAIK the 02 sensors are heated so they come online sooner (closed loop
> happens faster) and possibly before the engine warms up. I am not 100% sure
> with the Jeeps though and have not timed mine....yet! :-)
Took me a sec to get what you were getting at until I saw what you
quoted. I've got Mr. -------- filtered. One of the symptoms was that it
idles fine for bit and then gets rough, like possibly when the computer
starts using the O2 input. Anyone know how long roughly it takes for the
ECU to go to closed loop?
> "bllsht" <nospam@invaliddot.net> wrote in message
> news:v8ctuv0vent44g1cc4372jk2vo73k4khjs@4ax.com...
> > The O2 sensor is ignored until the engine is warmed up, junior.
-------- are you locked up in your parents garage with your computer?
You don't seem comfortable or familiar with interacting with real
people. You strike me as one of those geeks who uses the anonymity of
the internet as an opportunity to act like an ***. If you're an actual
mechanic I feel sorry for anyone who brings their vehicles to you, but
of course you don't act like this to them, you need the anonymity to
make you bold.
--
Simon
"I may be wrong, but I'm not uncertain." -- Robert A. Heinlein
12-28-2003, 05:18 PM
#25
Guest
Posts: n/a
Re: would an exhaust leak cause lean or rich sensor reading?
Dave wrote:
> HMMMM
> AFAIK the 02 sensors are heated so they come online sooner (closed loop
> happens faster) and possibly before the engine warms up. I am not 100% sure
> with the Jeeps though and have not timed mine....yet! :-)
Took me a sec to get what you were getting at until I saw what you
quoted. I've got Mr. -------- filtered. One of the symptoms was that it
idles fine for bit and then gets rough, like possibly when the computer
starts using the O2 input. Anyone know how long roughly it takes for the
ECU to go to closed loop?
> "bllsht" <nospam@invaliddot.net> wrote in message
> news:v8ctuv0vent44g1cc4372jk2vo73k4khjs@4ax.com...
> > The O2 sensor is ignored until the engine is warmed up, junior.
-------- are you locked up in your parents garage with your computer?
You don't seem comfortable or familiar with interacting with real
people. You strike me as one of those geeks who uses the anonymity of
the internet as an opportunity to act like an ***. If you're an actual
mechanic I feel sorry for anyone who brings their vehicles to you, but
of course you don't act like this to them, you need the anonymity to
make you bold.
--
Simon
"I may be wrong, but I'm not uncertain." -- Robert A. Heinlein
> HMMMM
> AFAIK the 02 sensors are heated so they come online sooner (closed loop
> happens faster) and possibly before the engine warms up. I am not 100% sure
> with the Jeeps though and have not timed mine....yet! :-)
Took me a sec to get what you were getting at until I saw what you
quoted. I've got Mr. -------- filtered. One of the symptoms was that it
idles fine for bit and then gets rough, like possibly when the computer
starts using the O2 input. Anyone know how long roughly it takes for the
ECU to go to closed loop?
> "bllsht" <nospam@invaliddot.net> wrote in message
> news:v8ctuv0vent44g1cc4372jk2vo73k4khjs@4ax.com...
> > The O2 sensor is ignored until the engine is warmed up, junior.
-------- are you locked up in your parents garage with your computer?
You don't seem comfortable or familiar with interacting with real
people. You strike me as one of those geeks who uses the anonymity of
the internet as an opportunity to act like an ***. If you're an actual
mechanic I feel sorry for anyone who brings their vehicles to you, but
of course you don't act like this to them, you need the anonymity to
make you bold.
--
Simon
"I may be wrong, but I'm not uncertain." -- Robert A. Heinlein
12-28-2003, 07:07 PM
#26
Guest
Posts: n/a
Re: would an exhaust leak cause lean or rich sensor reading?
In message <3FEF4130.80404@usefirstinitialandlastnameATerols. com>, "Simon
Juncal" wrote:
>L.W.(ßill) ------ III wrote:
>> More than likely your Oxygen Sensor is history, kind of like up
>> plugging it, it richens it, and has destroyed your catalytic convert by
>> now.
>
>The O2 sensor is new and the stepper motor initilizes indicating that
>the O2 sensor (and computer and stepper) are working. The Cat is also new.
You could take the O2 out and throw it away and the steeper will still
initialize. You shouldn't make such assumptions, junior.
Juncal" wrote:
>L.W.(ßill) ------ III wrote:
>> More than likely your Oxygen Sensor is history, kind of like up
>> plugging it, it richens it, and has destroyed your catalytic convert by
>> now.
>
>The O2 sensor is new and the stepper motor initilizes indicating that
>the O2 sensor (and computer and stepper) are working. The Cat is also new.
You could take the O2 out and throw it away and the steeper will still
initialize. You shouldn't make such assumptions, junior.
12-28-2003, 07:07 PM
#27
Guest
Posts: n/a
Re: would an exhaust leak cause lean or rich sensor reading?
In message <3FEF4130.80404@usefirstinitialandlastnameATerols. com>, "Simon
Juncal" wrote:
>L.W.(ßill) ------ III wrote:
>> More than likely your Oxygen Sensor is history, kind of like up
>> plugging it, it richens it, and has destroyed your catalytic convert by
>> now.
>
>The O2 sensor is new and the stepper motor initilizes indicating that
>the O2 sensor (and computer and stepper) are working. The Cat is also new.
You could take the O2 out and throw it away and the steeper will still
initialize. You shouldn't make such assumptions, junior.
Juncal" wrote:
>L.W.(ßill) ------ III wrote:
>> More than likely your Oxygen Sensor is history, kind of like up
>> plugging it, it richens it, and has destroyed your catalytic convert by
>> now.
>
>The O2 sensor is new and the stepper motor initilizes indicating that
>the O2 sensor (and computer and stepper) are working. The Cat is also new.
You could take the O2 out and throw it away and the steeper will still
initialize. You shouldn't make such assumptions, junior.
12-28-2003, 07:07 PM
#28
Guest
Posts: n/a
Re: would an exhaust leak cause lean or rich sensor reading?
In message <3FEF4130.80404@usefirstinitialandlastnameATerols. com>, "Simon
Juncal" wrote:
>L.W.(ßill) ------ III wrote:
>> More than likely your Oxygen Sensor is history, kind of like up
>> plugging it, it richens it, and has destroyed your catalytic convert by
>> now.
>
>The O2 sensor is new and the stepper motor initilizes indicating that
>the O2 sensor (and computer and stepper) are working. The Cat is also new.
You could take the O2 out and throw it away and the steeper will still
initialize. You shouldn't make such assumptions, junior.
Juncal" wrote:
>L.W.(ßill) ------ III wrote:
>> More than likely your Oxygen Sensor is history, kind of like up
>> plugging it, it richens it, and has destroyed your catalytic convert by
>> now.
>
>The O2 sensor is new and the stepper motor initilizes indicating that
>the O2 sensor (and computer and stepper) are working. The Cat is also new.
You could take the O2 out and throw it away and the steeper will still
initialize. You shouldn't make such assumptions, junior.
12-28-2003, 07:13 PM
#29
Guest
Posts: n/a
Re: would an exhaust leak cause lean or rich sensor reading?
In message <3FEF56A7.7090200@usefirstinitialandlastnameATerol s.com>, "Simon
Juncal" wrote:
>Dave wrote:
>> HMMMM
>> AFAIK the 02 sensors are heated so they come online sooner (closed loop
>> happens faster) and possibly before the engine warms up. I am not 100% sure
>> with the Jeeps though and have not timed mine....yet! :-)
>
>Took me a sec to get what you were getting at until I saw what you
>quoted. I've got Mr. -------- filtered. One of the symptoms was that it
>idles fine for bit and then gets rough, like possibly when the computer
>starts using the O2 input. Anyone know how long roughly it takes for the
> ECU to go to closed loop?
>
> > "bllsht" <nospam@invaliddot.net> wrote in message
> > news:v8ctuv0vent44g1cc4372jk2vo73k4khjs@4ax.com...
> > > The O2 sensor is ignored until the engine is warmed up, junior.
>
>-------- are you locked up in your parents garage with your computer?
>You don't seem comfortable or familiar with interacting with real
>people. You strike me as one of those geeks who uses the anonymity of
>the internet as an opportunity to act like an ***. If you're an actual
>mechanic I feel sorry for anyone who brings their vehicles to you, but
>of course you don't act like this to them, you need the anonymity to
>make you bold.
What a shame to miss out on good info, simpy because you don't like who delivers
it. Oh well...
My customers don't have to come here and ask the same question fifteen different
ways. If they can't fix it, they bring it in and get it handled right.
Filter away, junior! LOL
Juncal" wrote:
>Dave wrote:
>> HMMMM
>> AFAIK the 02 sensors are heated so they come online sooner (closed loop
>> happens faster) and possibly before the engine warms up. I am not 100% sure
>> with the Jeeps though and have not timed mine....yet! :-)
>
>Took me a sec to get what you were getting at until I saw what you
>quoted. I've got Mr. -------- filtered. One of the symptoms was that it
>idles fine for bit and then gets rough, like possibly when the computer
>starts using the O2 input. Anyone know how long roughly it takes for the
> ECU to go to closed loop?
>
> > "bllsht" <nospam@invaliddot.net> wrote in message
> > news:v8ctuv0vent44g1cc4372jk2vo73k4khjs@4ax.com...
> > > The O2 sensor is ignored until the engine is warmed up, junior.
>
>-------- are you locked up in your parents garage with your computer?
>You don't seem comfortable or familiar with interacting with real
>people. You strike me as one of those geeks who uses the anonymity of
>the internet as an opportunity to act like an ***. If you're an actual
>mechanic I feel sorry for anyone who brings their vehicles to you, but
>of course you don't act like this to them, you need the anonymity to
>make you bold.
What a shame to miss out on good info, simpy because you don't like who delivers
it. Oh well...
My customers don't have to come here and ask the same question fifteen different
ways. If they can't fix it, they bring it in and get it handled right.
Filter away, junior! LOL
12-28-2003, 07:13 PM
#30
Guest
Posts: n/a
Re: would an exhaust leak cause lean or rich sensor reading?
In message <3FEF56A7.7090200@usefirstinitialandlastnameATerol s.com>, "Simon
Juncal" wrote:
>Dave wrote:
>> HMMMM
>> AFAIK the 02 sensors are heated so they come online sooner (closed loop
>> happens faster) and possibly before the engine warms up. I am not 100% sure
>> with the Jeeps though and have not timed mine....yet! :-)
>
>Took me a sec to get what you were getting at until I saw what you
>quoted. I've got Mr. -------- filtered. One of the symptoms was that it
>idles fine for bit and then gets rough, like possibly when the computer
>starts using the O2 input. Anyone know how long roughly it takes for the
> ECU to go to closed loop?
>
> > "bllsht" <nospam@invaliddot.net> wrote in message
> > news:v8ctuv0vent44g1cc4372jk2vo73k4khjs@4ax.com...
> > > The O2 sensor is ignored until the engine is warmed up, junior.
>
>-------- are you locked up in your parents garage with your computer?
>You don't seem comfortable or familiar with interacting with real
>people. You strike me as one of those geeks who uses the anonymity of
>the internet as an opportunity to act like an ***. If you're an actual
>mechanic I feel sorry for anyone who brings their vehicles to you, but
>of course you don't act like this to them, you need the anonymity to
>make you bold.
What a shame to miss out on good info, simpy because you don't like who delivers
it. Oh well...
My customers don't have to come here and ask the same question fifteen different
ways. If they can't fix it, they bring it in and get it handled right.
Filter away, junior! LOL
Juncal" wrote:
>Dave wrote:
>> HMMMM
>> AFAIK the 02 sensors are heated so they come online sooner (closed loop
>> happens faster) and possibly before the engine warms up. I am not 100% sure
>> with the Jeeps though and have not timed mine....yet! :-)
>
>Took me a sec to get what you were getting at until I saw what you
>quoted. I've got Mr. -------- filtered. One of the symptoms was that it
>idles fine for bit and then gets rough, like possibly when the computer
>starts using the O2 input. Anyone know how long roughly it takes for the
> ECU to go to closed loop?
>
> > "bllsht" <nospam@invaliddot.net> wrote in message
> > news:v8ctuv0vent44g1cc4372jk2vo73k4khjs@4ax.com...
> > > The O2 sensor is ignored until the engine is warmed up, junior.
>
>-------- are you locked up in your parents garage with your computer?
>You don't seem comfortable or familiar with interacting with real
>people. You strike me as one of those geeks who uses the anonymity of
>the internet as an opportunity to act like an ***. If you're an actual
>mechanic I feel sorry for anyone who brings their vehicles to you, but
>of course you don't act like this to them, you need the anonymity to
>make you bold.
What a shame to miss out on good info, simpy because you don't like who delivers
it. Oh well...
My customers don't have to come here and ask the same question fifteen different
ways. If they can't fix it, they bring it in and get it handled right.
Filter away, junior! LOL