Confused 98 TJ Shift-Light / White Valve Stems
 

Hello,

I took my 98 TJ apart the other day, thinking I had a leaky exhaust
manifold, (turned out not to be the case) and It's all back together
now, but I noticed something strange while driving it the next few
days.

My "UPSHIFT" light is coming on when I'm in 5th gear.

Has anyone else had this "inconvenience" before? It's the least of my
worries, but seems strange, since all I did electrically was
disconnect the battery for a few days, and unplug and re-plug all the
intake manifold sensors..

Also, while I had the intake & exhause manifold off, I noticed that
all my exhaust valve stems are white, while all the intake are nice
and shiny still. Is this normal? Or is it a symptom of the engine
running too lean or something?
Any explanation or help would be great.

-Dave

Re: Confused 98 TJ Shift-Light / White Valve Stems
 

"Dave McGlynn" <dpmcglyn@marisaind.com> wrote in message
news:6ad73a15.0404280406.6d0e7b5c@posting.google.c om...
> Hello,
>
> I took my 98 TJ apart the other day, thinking I had a leaky exhaust
> manifold, (turned out not to be the case) and It's all back together
> now, but I noticed something strange while driving it the next few
> days.
>
> My "UPSHIFT" light is coming on when I'm in 5th gear.
>
> Has anyone else had this "inconvenience" before? It's the least of my
> worries, but seems strange, since all I did electrically was
> disconnect the battery for a few days, and unplug and re-plug all the
> intake manifold sensors..
>
> Also, while I had the intake & exhause manifold off, I noticed that
> all my exhaust valve stems are white, while all the intake are nice
> and shiny still. Is this normal? Or is it a symptom of the engine
> running too lean or something?
> Any explanation or help would be great.
>
> -Dave

I can't help you with the shift light, but the white on the valve stems is
normal cumbustion deposits. It also means that you aren't sending any oil
out the exhaust ports which means your rings and valve stem seals are in
good shape.

Chris

Re: Confused 98 TJ Shift-Light / White Valve Stems
 

"Dave McGlynn" <dpmcglyn@marisaind.com> wrote in message
news:6ad73a15.0404280406.6d0e7b5c@posting.google.c om...
> Hello,
>
> I took my 98 TJ apart the other day, thinking I had a leaky exhaust
> manifold, (turned out not to be the case) and It's all back together
> now, but I noticed something strange while driving it the next few
> days.
>
> My "UPSHIFT" light is coming on when I'm in 5th gear.
>
> Has anyone else had this "inconvenience" before? It's the least of my
> worries, but seems strange, since all I did electrically was
> disconnect the battery for a few days, and unplug and re-plug all the
> intake manifold sensors..
>
> Also, while I had the intake & exhause manifold off, I noticed that
> all my exhaust valve stems are white, while all the intake are nice
> and shiny still. Is this normal? Or is it a symptom of the engine
> running too lean or something?
> Any explanation or help would be great.
>
> -Dave

I can't help you with the shift light, but the white on the valve stems is
normal cumbustion deposits. It also means that you aren't sending any oil
out the exhaust ports which means your rings and valve stem seals are in
good shape.

Chris

Re: Confused 98 TJ Shift-Light / White Valve Stems
 

"Dave McGlynn" <dpmcglyn@marisaind.com> wrote in message
news:6ad73a15.0404280406.6d0e7b5c@posting.google.c om...
> Hello,
>
> I took my 98 TJ apart the other day, thinking I had a leaky exhaust
> manifold, (turned out not to be the case) and It's all back together
> now, but I noticed something strange while driving it the next few
> days.
>
> My "UPSHIFT" light is coming on when I'm in 5th gear.
>
> Has anyone else had this "inconvenience" before? It's the least of my
> worries, but seems strange, since all I did electrically was
> disconnect the battery for a few days, and unplug and re-plug all the
> intake manifold sensors..
>
> Also, while I had the intake & exhause manifold off, I noticed that
> all my exhaust valve stems are white, while all the intake are nice
> and shiny still. Is this normal? Or is it a symptom of the engine
> running too lean or something?
> Any explanation or help would be great.
>
> -Dave

I can't help you with the shift light, but the white on the valve stems is
normal cumbustion deposits. It also means that you aren't sending any oil
out the exhaust ports which means your rings and valve stem seals are in
good shape.

Chris

Re: Confused 98 TJ Shift-Light / White Valve Stems
 

"Dave McGlynn" <dpmcglyn@marisaind.com> wrote in message
news:6ad73a15.0404280406.6d0e7b5c@posting.google.c om...
> Hello,
>
> I took my 98 TJ apart the other day, thinking I had a leaky exhaust
> manifold, (turned out not to be the case) and It's all back together
> now, but I noticed something strange while driving it the next few
> days.
>
> My "UPSHIFT" light is coming on when I'm in 5th gear.
>
> Has anyone else had this "inconvenience" before? It's the least of my
> worries, but seems strange, since all I did electrically was
> disconnect the battery for a few days, and unplug and re-plug all the
> intake manifold sensors..
>
> Also, while I had the intake & exhause manifold off, I noticed that
> all my exhaust valve stems are white, while all the intake are nice
> and shiny still. Is this normal? Or is it a symptom of the engine
> running too lean or something?
> Any explanation or help would be great.
>
> -Dave

I can't help you with the shift light, but the white on the valve stems is
normal cumbustion deposits. It also means that you aren't sending any oil
out the exhaust ports which means your rings and valve stem seals are in
good shape.

Chris

Re: Confused 98 TJ Shift-Light / White Valve Stems
 

That is the 'this side up' light....
;-)

Seriously though, if it has changed how it works, you likely have a
vacuum line wrong or loose somewhere.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Dave McGlynn wrote:
>
> Hello,
>
> I took my 98 TJ apart the other day, thinking I had a leaky exhaust
> manifold, (turned out not to be the case) and It's all back together
> now, but I noticed something strange while driving it the next few
> days.
>
> My "UPSHIFT" light is coming on when I'm in 5th gear.
>
> Has anyone else had this "inconvenience" before? It's the least of my
> worries, but seems strange, since all I did electrically was
> disconnect the battery for a few days, and unplug and re-plug all the
> intake manifold sensors..
>
> Also, while I had the intake & exhause manifold off, I noticed that
> all my exhaust valve stems are white, while all the intake are nice
> and shiny still. Is this normal? Or is it a symptom of the engine
> running too lean or something?
> Any explanation or help would be great.
>
> -Dave

Re: Confused 98 TJ Shift-Light / White Valve Stems
 

That is the 'this side up' light....
;-)

Seriously though, if it has changed how it works, you likely have a
vacuum line wrong or loose somewhere.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Dave McGlynn wrote:
>
> Hello,
>
> I took my 98 TJ apart the other day, thinking I had a leaky exhaust
> manifold, (turned out not to be the case) and It's all back together
> now, but I noticed something strange while driving it the next few
> days.
>
> My "UPSHIFT" light is coming on when I'm in 5th gear.
>
> Has anyone else had this "inconvenience" before? It's the least of my
> worries, but seems strange, since all I did electrically was
> disconnect the battery for a few days, and unplug and re-plug all the
> intake manifold sensors..
>
> Also, while I had the intake & exhause manifold off, I noticed that
> all my exhaust valve stems are white, while all the intake are nice
> and shiny still. Is this normal? Or is it a symptom of the engine
> running too lean or something?
> Any explanation or help would be great.
>
> -Dave

Re: Confused 98 TJ Shift-Light / White Valve Stems
 

That is the 'this side up' light....
;-)

Seriously though, if it has changed how it works, you likely have a
vacuum line wrong or loose somewhere.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Dave McGlynn wrote:
>
> Hello,
>
> I took my 98 TJ apart the other day, thinking I had a leaky exhaust
> manifold, (turned out not to be the case) and It's all back together
> now, but I noticed something strange while driving it the next few
> days.
>
> My "UPSHIFT" light is coming on when I'm in 5th gear.
>
> Has anyone else had this "inconvenience" before? It's the least of my
> worries, but seems strange, since all I did electrically was
> disconnect the battery for a few days, and unplug and re-plug all the
> intake manifold sensors..
>
> Also, while I had the intake & exhause manifold off, I noticed that
> all my exhaust valve stems are white, while all the intake are nice
> and shiny still. Is this normal? Or is it a symptom of the engine
> running too lean or something?
> Any explanation or help would be great.
>
> -Dave

Re: Confused 98 TJ Shift-Light / White Valve Stems
 

That is the 'this side up' light....
;-)

Seriously though, if it has changed how it works, you likely have a
vacuum line wrong or loose somewhere.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Dave McGlynn wrote:
>
> Hello,
>
> I took my 98 TJ apart the other day, thinking I had a leaky exhaust
> manifold, (turned out not to be the case) and It's all back together
> now, but I noticed something strange while driving it the next few
> days.
>
> My "UPSHIFT" light is coming on when I'm in 5th gear.
>
> Has anyone else had this "inconvenience" before? It's the least of my
> worries, but seems strange, since all I did electrically was
> disconnect the battery for a few days, and unplug and re-plug all the
> intake manifold sensors..
>
> Also, while I had the intake & exhause manifold off, I noticed that
> all my exhaust valve stems are white, while all the intake are nice
> and shiny still. Is this normal? Or is it a symptom of the engine
> running too lean or something?
> Any explanation or help would be great.
>
> -Dave

Re: Confused 98 TJ Shift-Light / White Valve Stems
 

Ha ha! This side up light! lol!
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:408FB2B0.8C6B46EA@sympatico.ca...
> That is the 'this side up' light....
> ;-)
>
> Seriously though, if it has changed how it works, you likely have a
> vacuum line wrong or loose somewhere.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Dave McGlynn wrote:
> >
> > Hello,
> >
> > I took my 98 TJ apart the other day, thinking I had a leaky exhaust
> > manifold, (turned out not to be the case) and It's all back together
> > now, but I noticed something strange while driving it the next few
> > days.
> >
> > My "UPSHIFT" light is coming on when I'm in 5th gear.
> >
> > Has anyone else had this "inconvenience" before? It's the least of my
> > worries, but seems strange, since all I did electrically was
> > disconnect the battery for a few days, and unplug and re-plug all the
> > intake manifold sensors..
> >
> > Also, while I had the intake & exhause manifold off, I noticed that
> > all my exhaust valve stems are white, while all the intake are nice
> > and shiny still. Is this normal? Or is it a symptom of the engine
> > running too lean or something?
> > Any explanation or help would be great.
> >
> > -Dave