Mike Romain

It means a misfire or too weak of a spark for the inductor to pick up.

It does not mean the miss is electric in nature.

Too much gas, not enough gas, no compression, serious internal oil leak,
tons of things can cause a weak spark.

Mike

William Oliveri wrote:
>
> Why would, with a brand new plug in the hole, I get intermittent light on
> this cylinder but when I change to another cylinder it works fine? Is it
> because of the oil in the cylinder?
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:4023AED1.5CF9B41D@sympatico.ca...
> > Inductive timing lights lie.
> >
> > They do Not give an accurate reading on anything except a timing mark on
> > the flywheel.
> >
> > They are absolutely no good for trying to diagnose a miss.
> >
> > Been there been lied to. And it was an expensive freaking POS light
> > too.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > William Oliveri wrote:
> > >
> > > I've outlined my diagnostic list for determining the problem with #2
> > > cylinder and the oil soaked plug.
> > >
> > > 1st: Check the plug for spark. One of the reasons for this is I
> remembered
> > > when doing the valve seals I was trying to feel for pressure on the
> first
> > > cylinder (#2) and couldn't so I decided to pour a little oil in there to
> see
> > > if I got pressure. It didn't change but the point is I thought this was
> the
> > > reason for the oil stained plug so last night I changed to a new plug
> > > thinking I'll burn all that oil out of the cylinder by today. I drove
> it
> > > today about an hour and a half and checked the plug when I got home
> thinking
> > > it would be clean. It was not. It was just as oil stained as the
> previous
> > > one. So the next step is to determine if I'm getting spark to that
> > > cylinder. Maybe there's no spark there and it's just pushing that oil
> > > around (oil from the bad valve seal plus the stuff that I added). So
> > > tonight I hooked up a timing light to that cylinder and see it's getting
> > > intermittent spark. It has some spark then nothing for a couple of
> seconds
> > > then some spark, etc. I thought it might be the plug wire so I traded
> it
> > > out for another known good one (#1). No difference. I thought #2 pole
> on
> > > the cap might be bad so I change out a new cap and rotor (it was time
> > > anyway) and that didn't help.
> > >
> > > So the question is, when the timing light lights up is it a indication
> that
> > > an electronic signal is sent to the plug or that the plug is firing.
> > >
> > > What can I understand about a timing light which sometimes lights on one
> > > cylinder and works fine on the rest. Is it possible an injector is
> clogged
> > > from the oil before I was able to get the seals on?
> > >
> > > The next steps are (as time and equipment become available)
> > >
> > > Compression check on all cylinders.
> > > Pull valve cover and recheck valve seals on #2.
> > > Leak Down test on #2 and the rest.
> > >
> > > I will say that all the other cylinders are burning beautifully. I
> havn't
> > > seen it look so good since I owned the jeep.
> > >
> > > Thanks in advance,
> > >
> > > Bill

Mike Romain

It means a misfire or too weak of a spark for the inductor to pick up.

It does not mean the miss is electric in nature.

Too much gas, not enough gas, no compression, serious internal oil leak,
tons of things can cause a weak spark.

Mike

William Oliveri wrote:
>
> Why would, with a brand new plug in the hole, I get intermittent light on
> this cylinder but when I change to another cylinder it works fine? Is it
> because of the oil in the cylinder?
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:4023AED1.5CF9B41D@sympatico.ca...
> > Inductive timing lights lie.
> >
> > They do Not give an accurate reading on anything except a timing mark on
> > the flywheel.
> >
> > They are absolutely no good for trying to diagnose a miss.
> >
> > Been there been lied to. And it was an expensive freaking POS light
> > too.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > William Oliveri wrote:
> > >
> > > I've outlined my diagnostic list for determining the problem with #2
> > > cylinder and the oil soaked plug.
> > >
> > > 1st: Check the plug for spark. One of the reasons for this is I
> remembered
> > > when doing the valve seals I was trying to feel for pressure on the
> first
> > > cylinder (#2) and couldn't so I decided to pour a little oil in there to
> see
> > > if I got pressure. It didn't change but the point is I thought this was
> the
> > > reason for the oil stained plug so last night I changed to a new plug
> > > thinking I'll burn all that oil out of the cylinder by today. I drove
> it
> > > today about an hour and a half and checked the plug when I got home
> thinking
> > > it would be clean. It was not. It was just as oil stained as the
> previous
> > > one. So the next step is to determine if I'm getting spark to that
> > > cylinder. Maybe there's no spark there and it's just pushing that oil
> > > around (oil from the bad valve seal plus the stuff that I added). So
> > > tonight I hooked up a timing light to that cylinder and see it's getting
> > > intermittent spark. It has some spark then nothing for a couple of
> seconds
> > > then some spark, etc. I thought it might be the plug wire so I traded
> it
> > > out for another known good one (#1). No difference. I thought #2 pole
> on
> > > the cap might be bad so I change out a new cap and rotor (it was time
> > > anyway) and that didn't help.
> > >
> > > So the question is, when the timing light lights up is it a indication
> that
> > > an electronic signal is sent to the plug or that the plug is firing.
> > >
> > > What can I understand about a timing light which sometimes lights on one
> > > cylinder and works fine on the rest. Is it possible an injector is
> clogged
> > > from the oil before I was able to get the seals on?
> > >
> > > The next steps are (as time and equipment become available)
> > >
> > > Compression check on all cylinders.
> > > Pull valve cover and recheck valve seals on #2.
> > > Leak Down test on #2 and the rest.
> > >
> > > I will say that all the other cylinders are burning beautifully. I
> havn't
> > > seen it look so good since I owned the jeep.
> > >
> > > Thanks in advance,
> > >
> > > Bill

Mike Romain

It means a misfire or too weak of a spark for the inductor to pick up.

It does not mean the miss is electric in nature.

Too much gas, not enough gas, no compression, serious internal oil leak,
tons of things can cause a weak spark.

Mike

William Oliveri wrote:
>
> Why would, with a brand new plug in the hole, I get intermittent light on
> this cylinder but when I change to another cylinder it works fine? Is it
> because of the oil in the cylinder?
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:4023AED1.5CF9B41D@sympatico.ca...
> > Inductive timing lights lie.
> >
> > They do Not give an accurate reading on anything except a timing mark on
> > the flywheel.
> >
> > They are absolutely no good for trying to diagnose a miss.
> >
> > Been there been lied to. And it was an expensive freaking POS light
> > too.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > William Oliveri wrote:
> > >
> > > I've outlined my diagnostic list for determining the problem with #2
> > > cylinder and the oil soaked plug.
> > >
> > > 1st: Check the plug for spark. One of the reasons for this is I
> remembered
> > > when doing the valve seals I was trying to feel for pressure on the
> first
> > > cylinder (#2) and couldn't so I decided to pour a little oil in there to
> see
> > > if I got pressure. It didn't change but the point is I thought this was
> the
> > > reason for the oil stained plug so last night I changed to a new plug
> > > thinking I'll burn all that oil out of the cylinder by today. I drove
> it
> > > today about an hour and a half and checked the plug when I got home
> thinking
> > > it would be clean. It was not. It was just as oil stained as the
> previous
> > > one. So the next step is to determine if I'm getting spark to that
> > > cylinder. Maybe there's no spark there and it's just pushing that oil
> > > around (oil from the bad valve seal plus the stuff that I added). So
> > > tonight I hooked up a timing light to that cylinder and see it's getting
> > > intermittent spark. It has some spark then nothing for a couple of
> seconds
> > > then some spark, etc. I thought it might be the plug wire so I traded
> it
> > > out for another known good one (#1). No difference. I thought #2 pole
> on
> > > the cap might be bad so I change out a new cap and rotor (it was time
> > > anyway) and that didn't help.
> > >
> > > So the question is, when the timing light lights up is it a indication
> that
> > > an electronic signal is sent to the plug or that the plug is firing.
> > >
> > > What can I understand about a timing light which sometimes lights on one
> > > cylinder and works fine on the rest. Is it possible an injector is
> clogged
> > > from the oil before I was able to get the seals on?
> > >
> > > The next steps are (as time and equipment become available)
> > >
> > > Compression check on all cylinders.
> > > Pull valve cover and recheck valve seals on #2.
> > > Leak Down test on #2 and the rest.
> > >
> > > I will say that all the other cylinders are burning beautifully. I
> havn't
> > > seen it look so good since I owned the jeep.
> > >
> > > Thanks in advance,
> > >
> > > Bill

William Oliveri

I'm using a timing light which connects between the plug and the wire with a
wire apparatus.

Not the inductive Timing light you are mentioning.

Bill

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4023AED1.5CF9B41D@sympatico.ca...
> Inductive timing lights lie.
>
> They do Not give an accurate reading on anything except a timing mark on
> the flywheel.
>
> They are absolutely no good for trying to diagnose a miss.
>
> Been there been lied to. And it was an expensive freaking POS light
> too.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> William Oliveri wrote:
> >
> > I've outlined my diagnostic list for determining the problem with #2
> > cylinder and the oil soaked plug.
> >
> > 1st: Check the plug for spark. One of the reasons for this is I
remembered
> > when doing the valve seals I was trying to feel for pressure on the
first
> > cylinder (#2) and couldn't so I decided to pour a little oil in there to
see
> > if I got pressure. It didn't change but the point is I thought this was
the
> > reason for the oil stained plug so last night I changed to a new plug
> > thinking I'll burn all that oil out of the cylinder by today. I drove
it
> > today about an hour and a half and checked the plug when I got home
thinking
> > it would be clean. It was not. It was just as oil stained as the
previous
> > one. So the next step is to determine if I'm getting spark to that
> > cylinder. Maybe there's no spark there and it's just pushing that oil
> > around (oil from the bad valve seal plus the stuff that I added). So
> > tonight I hooked up a timing light to that cylinder and see it's getting
> > intermittent spark. It has some spark then nothing for a couple of
seconds
> > then some spark, etc. I thought it might be the plug wire so I traded
it
> > out for another known good one (#1). No difference. I thought #2 pole
on
> > the cap might be bad so I change out a new cap and rotor (it was time
> > anyway) and that didn't help.
> >
> > So the question is, when the timing light lights up is it a indication
that
> > an electronic signal is sent to the plug or that the plug is firing.
> >
> > What can I understand about a timing light which sometimes lights on one
> > cylinder and works fine on the rest. Is it possible an injector is
clogged
> > from the oil before I was able to get the seals on?
> >
> > The next steps are (as time and equipment become available)
> >
> > Compression check on all cylinders.
> > Pull valve cover and recheck valve seals on #2.
> > Leak Down test on #2 and the rest.
> >
> > I will say that all the other cylinders are burning beautifully. I
havn't
> > seen it look so good since I owned the jeep.
> >
> > Thanks in advance,
> >
> > Bill

William Oliveri

I'm using a timing light which connects between the plug and the wire with a
wire apparatus.

Not the inductive Timing light you are mentioning.

Bill

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4023AED1.5CF9B41D@sympatico.ca...
> Inductive timing lights lie.
>
> They do Not give an accurate reading on anything except a timing mark on
> the flywheel.
>
> They are absolutely no good for trying to diagnose a miss.
>
> Been there been lied to. And it was an expensive freaking POS light
> too.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> William Oliveri wrote:
> >
> > I've outlined my diagnostic list for determining the problem with #2
> > cylinder and the oil soaked plug.
> >
> > 1st: Check the plug for spark. One of the reasons for this is I
remembered
> > when doing the valve seals I was trying to feel for pressure on the
first
> > cylinder (#2) and couldn't so I decided to pour a little oil in there to
see
> > if I got pressure. It didn't change but the point is I thought this was
the
> > reason for the oil stained plug so last night I changed to a new plug
> > thinking I'll burn all that oil out of the cylinder by today. I drove
it
> > today about an hour and a half and checked the plug when I got home
thinking
> > it would be clean. It was not. It was just as oil stained as the
previous
> > one. So the next step is to determine if I'm getting spark to that
> > cylinder. Maybe there's no spark there and it's just pushing that oil
> > around (oil from the bad valve seal plus the stuff that I added). So
> > tonight I hooked up a timing light to that cylinder and see it's getting
> > intermittent spark. It has some spark then nothing for a couple of
seconds
> > then some spark, etc. I thought it might be the plug wire so I traded
it
> > out for another known good one (#1). No difference. I thought #2 pole
on
> > the cap might be bad so I change out a new cap and rotor (it was time
> > anyway) and that didn't help.
> >
> > So the question is, when the timing light lights up is it a indication
that
> > an electronic signal is sent to the plug or that the plug is firing.
> >
> > What can I understand about a timing light which sometimes lights on one
> > cylinder and works fine on the rest. Is it possible an injector is
clogged
> > from the oil before I was able to get the seals on?
> >
> > The next steps are (as time and equipment become available)
> >
> > Compression check on all cylinders.
> > Pull valve cover and recheck valve seals on #2.
> > Leak Down test on #2 and the rest.
> >
> > I will say that all the other cylinders are burning beautifully. I
havn't
> > seen it look so good since I owned the jeep.
> >
> > Thanks in advance,
> >
> > Bill

William Oliveri

I'm using a timing light which connects between the plug and the wire with a
wire apparatus.

Not the inductive Timing light you are mentioning.

Bill

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4023AED1.5CF9B41D@sympatico.ca...
> Inductive timing lights lie.
>
> They do Not give an accurate reading on anything except a timing mark on
> the flywheel.
>
> They are absolutely no good for trying to diagnose a miss.
>
> Been there been lied to. And it was an expensive freaking POS light
> too.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> William Oliveri wrote:
> >
> > I've outlined my diagnostic list for determining the problem with #2
> > cylinder and the oil soaked plug.
> >
> > 1st: Check the plug for spark. One of the reasons for this is I
remembered
> > when doing the valve seals I was trying to feel for pressure on the
first
> > cylinder (#2) and couldn't so I decided to pour a little oil in there to
see
> > if I got pressure. It didn't change but the point is I thought this was
the
> > reason for the oil stained plug so last night I changed to a new plug
> > thinking I'll burn all that oil out of the cylinder by today. I drove
it
> > today about an hour and a half and checked the plug when I got home
thinking
> > it would be clean. It was not. It was just as oil stained as the
previous
> > one. So the next step is to determine if I'm getting spark to that
> > cylinder. Maybe there's no spark there and it's just pushing that oil
> > around (oil from the bad valve seal plus the stuff that I added). So
> > tonight I hooked up a timing light to that cylinder and see it's getting
> > intermittent spark. It has some spark then nothing for a couple of
seconds
> > then some spark, etc. I thought it might be the plug wire so I traded
it
> > out for another known good one (#1). No difference. I thought #2 pole
on
> > the cap might be bad so I change out a new cap and rotor (it was time
> > anyway) and that didn't help.
> >
> > So the question is, when the timing light lights up is it a indication
that
> > an electronic signal is sent to the plug or that the plug is firing.
> >
> > What can I understand about a timing light which sometimes lights on one
> > cylinder and works fine on the rest. Is it possible an injector is
clogged
> > from the oil before I was able to get the seals on?
> >
> > The next steps are (as time and equipment become available)
> >
> > Compression check on all cylinders.
> > Pull valve cover and recheck valve seals on #2.
> > Leak Down test on #2 and the rest.
> >
> > I will say that all the other cylinders are burning beautifully. I
havn't
> > seen it look so good since I owned the jeep.
> >
> > Thanks in advance,
> >
> > Bill