'04 running rich
05-22-2007, 07:58 PM
#1
Guest
Posts: n/a
'04 running rich
For those of you who like diagnosing strange problems I have a doozy
for you.
The symptoms are as follows: Very rich smelling exhaust, inside of
tailpipe VERY thickly coated with soot, badly carboned plugs.
I have checked the following: Manifold vacuum (20 ish in/Hg at idle in
gear), done an aceytelene test around the intake and throttle-body
gaskets/assemblys. The OBD system reports NO PROBLEMS, the mpg figures
are all over the map over the past 2 months I have gotten from 14 to
33! mpg using the same brand/grade of fuel driving the same routes
every week. I have made NO changes to the vehicle WHAT SO EVER.
This has me stumped.
How about you.
for you.
The symptoms are as follows: Very rich smelling exhaust, inside of
tailpipe VERY thickly coated with soot, badly carboned plugs.
I have checked the following: Manifold vacuum (20 ish in/Hg at idle in
gear), done an aceytelene test around the intake and throttle-body
gaskets/assemblys. The OBD system reports NO PROBLEMS, the mpg figures
are all over the map over the past 2 months I have gotten from 14 to
33! mpg using the same brand/grade of fuel driving the same routes
every week. I have made NO changes to the vehicle WHAT SO EVER.
This has me stumped.
How about you.
05-22-2007, 09:13 PM
#2
Guest
Posts: n/a
Re: '04 running rich
On Tue, 22 May 2007 20:58:35 -0300, kevin.dooks@ns.sympatico.ca wrote:
>For those of you who like diagnosing strange problems I have a doozy
>for you.
>
>The symptoms are as follows: Very rich smelling exhaust, inside of
>tailpipe VERY thickly coated with soot, badly carboned plugs.
>
>I have checked the following: Manifold vacuum (20 ish in/Hg at idle in
>gear), done an aceytelene test around the intake and throttle-body
>gaskets/assemblys. The OBD system reports NO PROBLEMS, the mpg figures
>are all over the map over the past 2 months I have gotten from 14 to
>33! mpg using the same brand/grade of fuel driving the same routes
>every week. I have made NO changes to the vehicle WHAT SO EVER.
>
>This has me stumped.
>
>How about you.
Gee, how to reply to my own post, DUH.
Just some more info, the engine is a 4.0L (242 CID), with less than
50,000 km hooked to a 4 spd auto trans with a 3.55 ratio rear end.
One more note there appears to be NO loss of power and NO smoke out of
the tailpipe.
Strange eh?
Kevin
>For those of you who like diagnosing strange problems I have a doozy
>for you.
>
>The symptoms are as follows: Very rich smelling exhaust, inside of
>tailpipe VERY thickly coated with soot, badly carboned plugs.
>
>I have checked the following: Manifold vacuum (20 ish in/Hg at idle in
>gear), done an aceytelene test around the intake and throttle-body
>gaskets/assemblys. The OBD system reports NO PROBLEMS, the mpg figures
>are all over the map over the past 2 months I have gotten from 14 to
>33! mpg using the same brand/grade of fuel driving the same routes
>every week. I have made NO changes to the vehicle WHAT SO EVER.
>
>This has me stumped.
>
>How about you.
Gee, how to reply to my own post, DUH.
Just some more info, the engine is a 4.0L (242 CID), with less than
50,000 km hooked to a 4 spd auto trans with a 3.55 ratio rear end.
One more note there appears to be NO loss of power and NO smoke out of
the tailpipe.
Strange eh?
Kevin
05-22-2007, 09:13 PM
#3
Guest
Posts: n/a
Re: '04 running rich
On Tue, 22 May 2007 20:58:35 -0300, kevin.dooks@ns.sympatico.ca wrote:
>For those of you who like diagnosing strange problems I have a doozy
>for you.
>
>The symptoms are as follows: Very rich smelling exhaust, inside of
>tailpipe VERY thickly coated with soot, badly carboned plugs.
>
>I have checked the following: Manifold vacuum (20 ish in/Hg at idle in
>gear), done an aceytelene test around the intake and throttle-body
>gaskets/assemblys. The OBD system reports NO PROBLEMS, the mpg figures
>are all over the map over the past 2 months I have gotten from 14 to
>33! mpg using the same brand/grade of fuel driving the same routes
>every week. I have made NO changes to the vehicle WHAT SO EVER.
>
>This has me stumped.
>
>How about you.
Gee, how to reply to my own post, DUH.
Just some more info, the engine is a 4.0L (242 CID), with less than
50,000 km hooked to a 4 spd auto trans with a 3.55 ratio rear end.
One more note there appears to be NO loss of power and NO smoke out of
the tailpipe.
Strange eh?
Kevin
>For those of you who like diagnosing strange problems I have a doozy
>for you.
>
>The symptoms are as follows: Very rich smelling exhaust, inside of
>tailpipe VERY thickly coated with soot, badly carboned plugs.
>
>I have checked the following: Manifold vacuum (20 ish in/Hg at idle in
>gear), done an aceytelene test around the intake and throttle-body
>gaskets/assemblys. The OBD system reports NO PROBLEMS, the mpg figures
>are all over the map over the past 2 months I have gotten from 14 to
>33! mpg using the same brand/grade of fuel driving the same routes
>every week. I have made NO changes to the vehicle WHAT SO EVER.
>
>This has me stumped.
>
>How about you.
Gee, how to reply to my own post, DUH.
Just some more info, the engine is a 4.0L (242 CID), with less than
50,000 km hooked to a 4 spd auto trans with a 3.55 ratio rear end.
One more note there appears to be NO loss of power and NO smoke out of
the tailpipe.
Strange eh?
Kevin
05-22-2007, 09:13 PM
#4
Guest
Posts: n/a
Re: '04 running rich
On Tue, 22 May 2007 20:58:35 -0300, kevin.dooks@ns.sympatico.ca wrote:
>For those of you who like diagnosing strange problems I have a doozy
>for you.
>
>The symptoms are as follows: Very rich smelling exhaust, inside of
>tailpipe VERY thickly coated with soot, badly carboned plugs.
>
>I have checked the following: Manifold vacuum (20 ish in/Hg at idle in
>gear), done an aceytelene test around the intake and throttle-body
>gaskets/assemblys. The OBD system reports NO PROBLEMS, the mpg figures
>are all over the map over the past 2 months I have gotten from 14 to
>33! mpg using the same brand/grade of fuel driving the same routes
>every week. I have made NO changes to the vehicle WHAT SO EVER.
>
>This has me stumped.
>
>How about you.
Gee, how to reply to my own post, DUH.
Just some more info, the engine is a 4.0L (242 CID), with less than
50,000 km hooked to a 4 spd auto trans with a 3.55 ratio rear end.
One more note there appears to be NO loss of power and NO smoke out of
the tailpipe.
Strange eh?
Kevin
>For those of you who like diagnosing strange problems I have a doozy
>for you.
>
>The symptoms are as follows: Very rich smelling exhaust, inside of
>tailpipe VERY thickly coated with soot, badly carboned plugs.
>
>I have checked the following: Manifold vacuum (20 ish in/Hg at idle in
>gear), done an aceytelene test around the intake and throttle-body
>gaskets/assemblys. The OBD system reports NO PROBLEMS, the mpg figures
>are all over the map over the past 2 months I have gotten from 14 to
>33! mpg using the same brand/grade of fuel driving the same routes
>every week. I have made NO changes to the vehicle WHAT SO EVER.
>
>This has me stumped.
>
>How about you.
Gee, how to reply to my own post, DUH.
Just some more info, the engine is a 4.0L (242 CID), with less than
50,000 km hooked to a 4 spd auto trans with a 3.55 ratio rear end.
One more note there appears to be NO loss of power and NO smoke out of
the tailpipe.
Strange eh?
Kevin
05-22-2007, 09:13 PM
#5
Guest
Posts: n/a
Re: '04 running rich
On Tue, 22 May 2007 20:58:35 -0300, kevin.dooks@ns.sympatico.ca wrote:
>For those of you who like diagnosing strange problems I have a doozy
>for you.
>
>The symptoms are as follows: Very rich smelling exhaust, inside of
>tailpipe VERY thickly coated with soot, badly carboned plugs.
>
>I have checked the following: Manifold vacuum (20 ish in/Hg at idle in
>gear), done an aceytelene test around the intake and throttle-body
>gaskets/assemblys. The OBD system reports NO PROBLEMS, the mpg figures
>are all over the map over the past 2 months I have gotten from 14 to
>33! mpg using the same brand/grade of fuel driving the same routes
>every week. I have made NO changes to the vehicle WHAT SO EVER.
>
>This has me stumped.
>
>How about you.
Gee, how to reply to my own post, DUH.
Just some more info, the engine is a 4.0L (242 CID), with less than
50,000 km hooked to a 4 spd auto trans with a 3.55 ratio rear end.
One more note there appears to be NO loss of power and NO smoke out of
the tailpipe.
Strange eh?
Kevin
>For those of you who like diagnosing strange problems I have a doozy
>for you.
>
>The symptoms are as follows: Very rich smelling exhaust, inside of
>tailpipe VERY thickly coated with soot, badly carboned plugs.
>
>I have checked the following: Manifold vacuum (20 ish in/Hg at idle in
>gear), done an aceytelene test around the intake and throttle-body
>gaskets/assemblys. The OBD system reports NO PROBLEMS, the mpg figures
>are all over the map over the past 2 months I have gotten from 14 to
>33! mpg using the same brand/grade of fuel driving the same routes
>every week. I have made NO changes to the vehicle WHAT SO EVER.
>
>This has me stumped.
>
>How about you.
Gee, how to reply to my own post, DUH.
Just some more info, the engine is a 4.0L (242 CID), with less than
50,000 km hooked to a 4 spd auto trans with a 3.55 ratio rear end.
One more note there appears to be NO loss of power and NO smoke out of
the tailpipe.
Strange eh?
Kevin
05-23-2007, 09:24 AM
#6
Guest
Posts: n/a
Re: '04 running rich
02 sensors and map sensors come to mind first
kevin.dooks@ns.sympatico.ca wrote:
> For those of you who like diagnosing strange problems I have a doozy
> for you.
>
> The symptoms are as follows: Very rich smelling exhaust, inside of
> tailpipe VERY thickly coated with soot, badly carboned plugs.
>
> I have checked the following: Manifold vacuum (20 ish in/Hg at idle in
> gear), done an aceytelene test around the intake and throttle-body
> gaskets/assemblys. The OBD system reports NO PROBLEMS, the mpg figures
> are all over the map over the past 2 months I have gotten from 14 to
> 33! mpg using the same brand/grade of fuel driving the same routes
> every week. I have made NO changes to the vehicle WHAT SO EVER.
>
> This has me stumped.
>
> How about you.
kevin.dooks@ns.sympatico.ca wrote:
> For those of you who like diagnosing strange problems I have a doozy
> for you.
>
> The symptoms are as follows: Very rich smelling exhaust, inside of
> tailpipe VERY thickly coated with soot, badly carboned plugs.
>
> I have checked the following: Manifold vacuum (20 ish in/Hg at idle in
> gear), done an aceytelene test around the intake and throttle-body
> gaskets/assemblys. The OBD system reports NO PROBLEMS, the mpg figures
> are all over the map over the past 2 months I have gotten from 14 to
> 33! mpg using the same brand/grade of fuel driving the same routes
> every week. I have made NO changes to the vehicle WHAT SO EVER.
>
> This has me stumped.
>
> How about you.
05-23-2007, 09:24 AM
#7
Guest
Posts: n/a
Re: '04 running rich
02 sensors and map sensors come to mind first
kevin.dooks@ns.sympatico.ca wrote:
> For those of you who like diagnosing strange problems I have a doozy
> for you.
>
> The symptoms are as follows: Very rich smelling exhaust, inside of
> tailpipe VERY thickly coated with soot, badly carboned plugs.
>
> I have checked the following: Manifold vacuum (20 ish in/Hg at idle in
> gear), done an aceytelene test around the intake and throttle-body
> gaskets/assemblys. The OBD system reports NO PROBLEMS, the mpg figures
> are all over the map over the past 2 months I have gotten from 14 to
> 33! mpg using the same brand/grade of fuel driving the same routes
> every week. I have made NO changes to the vehicle WHAT SO EVER.
>
> This has me stumped.
>
> How about you.
kevin.dooks@ns.sympatico.ca wrote:
> For those of you who like diagnosing strange problems I have a doozy
> for you.
>
> The symptoms are as follows: Very rich smelling exhaust, inside of
> tailpipe VERY thickly coated with soot, badly carboned plugs.
>
> I have checked the following: Manifold vacuum (20 ish in/Hg at idle in
> gear), done an aceytelene test around the intake and throttle-body
> gaskets/assemblys. The OBD system reports NO PROBLEMS, the mpg figures
> are all over the map over the past 2 months I have gotten from 14 to
> 33! mpg using the same brand/grade of fuel driving the same routes
> every week. I have made NO changes to the vehicle WHAT SO EVER.
>
> This has me stumped.
>
> How about you.
05-23-2007, 09:24 AM
#8
Guest
Posts: n/a
Re: '04 running rich
02 sensors and map sensors come to mind first
kevin.dooks@ns.sympatico.ca wrote:
> For those of you who like diagnosing strange problems I have a doozy
> for you.
>
> The symptoms are as follows: Very rich smelling exhaust, inside of
> tailpipe VERY thickly coated with soot, badly carboned plugs.
>
> I have checked the following: Manifold vacuum (20 ish in/Hg at idle in
> gear), done an aceytelene test around the intake and throttle-body
> gaskets/assemblys. The OBD system reports NO PROBLEMS, the mpg figures
> are all over the map over the past 2 months I have gotten from 14 to
> 33! mpg using the same brand/grade of fuel driving the same routes
> every week. I have made NO changes to the vehicle WHAT SO EVER.
>
> This has me stumped.
>
> How about you.
kevin.dooks@ns.sympatico.ca wrote:
> For those of you who like diagnosing strange problems I have a doozy
> for you.
>
> The symptoms are as follows: Very rich smelling exhaust, inside of
> tailpipe VERY thickly coated with soot, badly carboned plugs.
>
> I have checked the following: Manifold vacuum (20 ish in/Hg at idle in
> gear), done an aceytelene test around the intake and throttle-body
> gaskets/assemblys. The OBD system reports NO PROBLEMS, the mpg figures
> are all over the map over the past 2 months I have gotten from 14 to
> 33! mpg using the same brand/grade of fuel driving the same routes
> every week. I have made NO changes to the vehicle WHAT SO EVER.
>
> This has me stumped.
>
> How about you.
05-23-2007, 09:24 AM
#9
Guest
Posts: n/a
Re: '04 running rich
02 sensors and map sensors come to mind first
kevin.dooks@ns.sympatico.ca wrote:
> For those of you who like diagnosing strange problems I have a doozy
> for you.
>
> The symptoms are as follows: Very rich smelling exhaust, inside of
> tailpipe VERY thickly coated with soot, badly carboned plugs.
>
> I have checked the following: Manifold vacuum (20 ish in/Hg at idle in
> gear), done an aceytelene test around the intake and throttle-body
> gaskets/assemblys. The OBD system reports NO PROBLEMS, the mpg figures
> are all over the map over the past 2 months I have gotten from 14 to
> 33! mpg using the same brand/grade of fuel driving the same routes
> every week. I have made NO changes to the vehicle WHAT SO EVER.
>
> This has me stumped.
>
> How about you.
kevin.dooks@ns.sympatico.ca wrote:
> For those of you who like diagnosing strange problems I have a doozy
> for you.
>
> The symptoms are as follows: Very rich smelling exhaust, inside of
> tailpipe VERY thickly coated with soot, badly carboned plugs.
>
> I have checked the following: Manifold vacuum (20 ish in/Hg at idle in
> gear), done an aceytelene test around the intake and throttle-body
> gaskets/assemblys. The OBD system reports NO PROBLEMS, the mpg figures
> are all over the map over the past 2 months I have gotten from 14 to
> 33! mpg using the same brand/grade of fuel driving the same routes
> every week. I have made NO changes to the vehicle WHAT SO EVER.
>
> This has me stumped.
>
> How about you.
05-23-2007, 02:26 PM
#10
Guest
Posts: n/a
Re: '04 running rich
<kevin.dooks@ns.sympatico.ca> wrote in message
news:3tv653tadjqjj9g8ddf2tifm70jp151jh3@4ax.com...
> For those of you who like diagnosing strange problems I have a doozy
> for you.
>
> The symptoms are as follows: Very rich smelling exhaust, inside of
> tailpipe VERY thickly coated with soot, badly carboned plugs.
>
> I have checked the following: Manifold vacuum (20 ish in/Hg at idle in
> gear), done an aceytelene test around the intake and throttle-body
> gaskets/assemblys. The OBD system reports NO PROBLEMS, the mpg figures
> are all over the map over the past 2 months I have gotten from 14 to
> 33! mpg using the same brand/grade of fuel driving the same routes
> every week. I have made NO changes to the vehicle WHAT SO EVER.
>
I seriously doubt your Jeep can run rich and not throw an OBD II code as a
result. The O2 Sensor(s) are looking at the rich/lean condition, both before
and after the CAT.