Check light on after cat fix???
 

The cat converter was clogged on my TJ and I cleaned it out. Now the check
engine light comes on. I have reset the computer by d/c the bat for 10
minutes but it came on again. O2 sensor? I don't want to start replacing
sensors without cause. Any thoughts? Where should I start to check?

Re: Check light on after cat fix???
 

Fred did pass the time by typing:
> The cat converter was clogged on my TJ and I cleaned it out. Now the check
> engine light comes on. I have reset the computer by d/c the bat for 10
> minutes but it came on again. O2 sensor? I don't want to start replacing
> sensors without cause. Any thoughts? Where should I start to check?

If your cat was clogged it was because your engine was running way too rich.
Bet your plugs have lots of black carbon on them, your performance was stink
and gas mileage was way down.

replace your O2 sensor, it's shot. If you don't you will be replacing another
clogged cat.


--
-- DougW -- 93 ZJ 4.0 http://members.cox.net/wilsond
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors

Re: Check light on after cat fix???
 

Fred did pass the time by typing:
> The cat converter was clogged on my TJ and I cleaned it out. Now the check
> engine light comes on. I have reset the computer by d/c the bat for 10
> minutes but it came on again. O2 sensor? I don't want to start replacing
> sensors without cause. Any thoughts? Where should I start to check?

If your cat was clogged it was because your engine was running way too rich.
Bet your plugs have lots of black carbon on them, your performance was stink
and gas mileage was way down.

replace your O2 sensor, it's shot. If you don't you will be replacing another
clogged cat.


--
-- DougW -- 93 ZJ 4.0 http://members.cox.net/wilsond
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors

Re: Check light on after cat fix???
 

Fred did pass the time by typing:
> The cat converter was clogged on my TJ and I cleaned it out. Now the check
> engine light comes on. I have reset the computer by d/c the bat for 10
> minutes but it came on again. O2 sensor? I don't want to start replacing
> sensors without cause. Any thoughts? Where should I start to check?

If your cat was clogged it was because your engine was running way too rich.
Bet your plugs have lots of black carbon on them, your performance was stink
and gas mileage was way down.

replace your O2 sensor, it's shot. If you don't you will be replacing another
clogged cat.


--
-- DougW -- 93 ZJ 4.0 http://members.cox.net/wilsond
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors

Re: Check light on after cat fix???
 

You have to have a working cat to keep the light off. OBD2 requires the PCM
to check for cat efficiency. Obviously, yours isn't very efficient if you
have "cleaned it out."


Jerry

"DougW" <post.replies@invalid.address> wrote in message
news:VsfKb.54026$PK3.8741@okepread01...
> Fred did pass the time by typing:
> > The cat converter was clogged on my TJ and I cleaned it out. Now the
check
> > engine light comes on. I have reset the computer by d/c the bat for 10
> > minutes but it came on again. O2 sensor? I don't want to start
replacing
> > sensors without cause. Any thoughts? Where should I start to check?
>
> If your cat was clogged it was because your engine was running way too
rich.
> Bet your plugs have lots of black carbon on them, your performance was
stink
> and gas mileage was way down.
>
> replace your O2 sensor, it's shot. If you don't you will be replacing
another
> clogged cat.
>
>
> --
> -- DougW -- 93 ZJ 4.0 http://members.cox.net/wilsond
> HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
> Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
>
>

Re: Check light on after cat fix???
 

You have to have a working cat to keep the light off. OBD2 requires the PCM
to check for cat efficiency. Obviously, yours isn't very efficient if you
have "cleaned it out."


Jerry

"DougW" <post.replies@invalid.address> wrote in message
news:VsfKb.54026$PK3.8741@okepread01...
> Fred did pass the time by typing:
> > The cat converter was clogged on my TJ and I cleaned it out. Now the
check
> > engine light comes on. I have reset the computer by d/c the bat for 10
> > minutes but it came on again. O2 sensor? I don't want to start
replacing
> > sensors without cause. Any thoughts? Where should I start to check?
>
> If your cat was clogged it was because your engine was running way too
rich.
> Bet your plugs have lots of black carbon on them, your performance was
stink
> and gas mileage was way down.
>
> replace your O2 sensor, it's shot. If you don't you will be replacing
another
> clogged cat.
>
>
> --
> -- DougW -- 93 ZJ 4.0 http://members.cox.net/wilsond
> HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
> Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
>
>

Re: Check light on after cat fix???
 

You have to have a working cat to keep the light off. OBD2 requires the PCM
to check for cat efficiency. Obviously, yours isn't very efficient if you
have "cleaned it out."


Jerry

"DougW" <post.replies@invalid.address> wrote in message
news:VsfKb.54026$PK3.8741@okepread01...
> Fred did pass the time by typing:
> > The cat converter was clogged on my TJ and I cleaned it out. Now the
check
> > engine light comes on. I have reset the computer by d/c the bat for 10
> > minutes but it came on again. O2 sensor? I don't want to start
replacing
> > sensors without cause. Any thoughts? Where should I start to check?
>
> If your cat was clogged it was because your engine was running way too
rich.
> Bet your plugs have lots of black carbon on them, your performance was
stink
> and gas mileage was way down.
>
> replace your O2 sensor, it's shot. If you don't you will be replacing
another
> clogged cat.
>
>
> --
> -- DougW -- 93 ZJ 4.0 http://members.cox.net/wilsond
> HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
> Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
>
>

Re: Check light on after cat fix???
 

The cat actually broke up and clogged the tail pipe. Will a new o2 sensor
work on an "open"system?
"Jerry Newton" <fig@mcttelecom.com> wrote in message
news:3ff9baea$1_2@newspeer2.tds.net...
> You have to have a working cat to keep the light off. OBD2 requires the
PCM
> to check for cat efficiency. Obviously, yours isn't very efficient if you
> have "cleaned it out."
>
>
> Jerry
>
> "DougW" <post.replies@invalid.address> wrote in message
> news:VsfKb.54026$PK3.8741@okepread01...
> > Fred did pass the time by typing:
> > > The cat converter was clogged on my TJ and I cleaned it out. Now the
> check
> > > engine light comes on. I have reset the computer by d/c the bat for 10
> > > minutes but it came on again. O2 sensor? I don't want to start
> replacing
> > > sensors without cause. Any thoughts? Where should I start to check?
> >
> > If your cat was clogged it was because your engine was running way too
> rich.
> > Bet your plugs have lots of black carbon on them, your performance was
> stink
> > and gas mileage was way down.
> >
> > replace your O2 sensor, it's shot. If you don't you will be replacing
> another
> > clogged cat.
> >
> >
> > --
> > -- DougW -- 93 ZJ 4.0 http://members.cox.net/wilsond
> > HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
> > Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
> >
> >
>
>

Re: Check light on after cat fix???
 

The cat actually broke up and clogged the tail pipe. Will a new o2 sensor
work on an "open"system?
"Jerry Newton" <fig@mcttelecom.com> wrote in message
news:3ff9baea$1_2@newspeer2.tds.net...
> You have to have a working cat to keep the light off. OBD2 requires the
PCM
> to check for cat efficiency. Obviously, yours isn't very efficient if you
> have "cleaned it out."
>
>
> Jerry
>
> "DougW" <post.replies@invalid.address> wrote in message
> news:VsfKb.54026$PK3.8741@okepread01...
> > Fred did pass the time by typing:
> > > The cat converter was clogged on my TJ and I cleaned it out. Now the
> check
> > > engine light comes on. I have reset the computer by d/c the bat for 10
> > > minutes but it came on again. O2 sensor? I don't want to start
> replacing
> > > sensors without cause. Any thoughts? Where should I start to check?
> >
> > If your cat was clogged it was because your engine was running way too
> rich.
> > Bet your plugs have lots of black carbon on them, your performance was
> stink
> > and gas mileage was way down.
> >
> > replace your O2 sensor, it's shot. If you don't you will be replacing
> another
> > clogged cat.
> >
> >
> > --
> > -- DougW -- 93 ZJ 4.0 http://members.cox.net/wilsond
> > HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
> > Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
> >
> >
>
>

Re: Check light on after cat fix???
 

The cat actually broke up and clogged the tail pipe. Will a new o2 sensor
work on an "open"system?
"Jerry Newton" <fig@mcttelecom.com> wrote in message
news:3ff9baea$1_2@newspeer2.tds.net...
> You have to have a working cat to keep the light off. OBD2 requires the
PCM
> to check for cat efficiency. Obviously, yours isn't very efficient if you
> have "cleaned it out."
>
>
> Jerry
>
> "DougW" <post.replies@invalid.address> wrote in message
> news:VsfKb.54026$PK3.8741@okepread01...
> > Fred did pass the time by typing:
> > > The cat converter was clogged on my TJ and I cleaned it out. Now the
> check
> > > engine light comes on. I have reset the computer by d/c the bat for 10
> > > minutes but it came on again. O2 sensor? I don't want to start
> replacing
> > > sensors without cause. Any thoughts? Where should I start to check?
> >
> > If your cat was clogged it was because your engine was running way too
> rich.
> > Bet your plugs have lots of black carbon on them, your performance was
> stink
> > and gas mileage was way down.
> >
> > replace your O2 sensor, it's shot. If you don't you will be replacing
> another
> > clogged cat.
> >
> >
> > --
> > -- DougW -- 93 ZJ 4.0 http://members.cox.net/wilsond
> > HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
> > Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
> >
> >
>
>

Re: Check light on after cat fix???
 

Fred did pass the time by typing:
> The cat actually broke up and clogged the tail pipe. Will a new o2 sensor
> work on an "open"system?

That depends on if you have two O2 sensors.

If you only have an O2 sensor upstream from the Cat then
yes, it will work. If you have one upstream and one
downstream then no, it will not work (although I have
been told that second sensor can be faked out since all it
does is throw a trouble code).

--
DougW

Re: Check light on after cat fix???
 

Fred did pass the time by typing:
> The cat actually broke up and clogged the tail pipe. Will a new o2 sensor
> work on an "open"system?

That depends on if you have two O2 sensors.

If you only have an O2 sensor upstream from the Cat then
yes, it will work. If you have one upstream and one
downstream then no, it will not work (although I have
been told that second sensor can be faked out since all it
does is throw a trouble code).

--
DougW

Re: Check light on after cat fix???
 

Fred did pass the time by typing:
> The cat actually broke up and clogged the tail pipe. Will a new o2 sensor
> work on an "open"system?

That depends on if you have two O2 sensors.

If you only have an O2 sensor upstream from the Cat then
yes, it will work. If you have one upstream and one
downstream then no, it will not work (although I have
been told that second sensor can be faked out since all it
does is throw a trouble code).

--
DougW

Re: Check light on after cat fix???
 

It has 2 sensors, 1 up and one down. I was hoping it would learn when I d/c
the bat. I'm surprized it didn't throw a code when it was breaking up.
"DougW" <post.replies@invalid.address> wrote in message
news:BbHKb.55791$PK3.19501@okepread01...
> Fred did pass the time by typing:
> > The cat actually broke up and clogged the tail pipe. Will a new o2
sensor
> > work on an "open"system?
>
> That depends on if you have two O2 sensors.
>
> If you only have an O2 sensor upstream from the Cat then
> yes, it will work. If you have one upstream and one
> downstream then no, it will not work (although I have
> been told that second sensor can be faked out since all it
> does is throw a trouble code).
>
> --
> DougW
>
>

Re: Check light on after cat fix???
 

It has 2 sensors, 1 up and one down. I was hoping it would learn when I d/c
the bat. I'm surprized it didn't throw a code when it was breaking up.
"DougW" <post.replies@invalid.address> wrote in message
news:BbHKb.55791$PK3.19501@okepread01...
> Fred did pass the time by typing:
> > The cat actually broke up and clogged the tail pipe. Will a new o2
sensor
> > work on an "open"system?
>
> That depends on if you have two O2 sensors.
>
> If you only have an O2 sensor upstream from the Cat then
> yes, it will work. If you have one upstream and one
> downstream then no, it will not work (although I have
> been told that second sensor can be faked out since all it
> does is throw a trouble code).
>
> --
> DougW
>
>

Re: Check light on after cat fix???
 

It has 2 sensors, 1 up and one down. I was hoping it would learn when I d/c
the bat. I'm surprized it didn't throw a code when it was breaking up.
"DougW" <post.replies@invalid.address> wrote in message
news:BbHKb.55791$PK3.19501@okepread01...
> Fred did pass the time by typing:
> > The cat actually broke up and clogged the tail pipe. Will a new o2
sensor
> > work on an "open"system?
>
> That depends on if you have two O2 sensors.
>
> If you only have an O2 sensor upstream from the Cat then
> yes, it will work. If you have one upstream and one
> downstream then no, it will not work (although I have
> been told that second sensor can be faked out since all it
> does is throw a trouble code).
>
> --
> DougW
>
>

Re: Check light on after cat fix???
 

clogged cat. and you cleaned it out! that in itself will set a code.
cat.converter efficiency error

Fred wrote:

> The cat converter was clogged on my TJ and I cleaned it out. Now the check
> engine light comes on. I have reset the computer by d/c the bat for 10
> minutes but it came on again. O2 sensor? I don't want to start replacing
> sensors without cause. Any thoughts? Where should I start to check?

Re: Check light on after cat fix???
 

clogged cat. and you cleaned it out! that in itself will set a code.
cat.converter efficiency error

Fred wrote:

> The cat converter was clogged on my TJ and I cleaned it out. Now the check
> engine light comes on. I have reset the computer by d/c the bat for 10
> minutes but it came on again. O2 sensor? I don't want to start replacing
> sensors without cause. Any thoughts? Where should I start to check?

Re: Check light on after cat fix???
 

clogged cat. and you cleaned it out! that in itself will set a code.
cat.converter efficiency error

Fred wrote:

> The cat converter was clogged on my TJ and I cleaned it out. Now the check
> engine light comes on. I have reset the computer by d/c the bat for 10
> minutes but it came on again. O2 sensor? I don't want to start replacing
> sensors without cause. Any thoughts? Where should I start to check?