Re: P0303 cylinder #3 misfire
 

One connector, 4 wires. 12v in and 3 driver wires.

On Sun, 07 Jan 2007 12:05:11 -0500, Mike Romain <romainm@sympatico.ca>
wrote:

>Ok, but for one coil power two cylinders I would think there is one
>input connection on the coil to rail and one connection going to each
>plug with a connection at each plug, no?
>
>Haven't seen the setup yet.
>
>Mike
>
>bllsht wrote:
>>
>> A bad connection would kill either 2 or all cylinders.
>>
>> On Sat, 06 Jan 2007 20:32:50 -0500, Mike Romain <romainm@sympatico.ca>
>> wrote:
>>
>> >Or it's electronic plug and socket are dirty.....
>> >
>> >Mike
>> >
>> >Jeff Strickland wrote:
>> >>
>> >> So, one of the coils is bad.
>> >>
>> >> "Carl" <carlsaiyed@hotmailREMOVE.com> wrote in message
>> >> news:bdqdnb4NANz57QHYnZ2dnUVZ_tOmnZ2d@comcast.com. ..
>> >> > Jeff, no plug wires or dist cap on an 00 and 01. Coil rail with three coil
>> >> > packs.
>> >> >
>> >> > Carl
>> >> >
>> >> >
>> >> > "Jeff Strickland" <crwlr@yahoo.com> wrote in message
>> >> > news:OfidnY5u3NmnmQHYnZ2dnUVZ_h6jnZ2d@ez2.net...
>> >> >> With a misfire, I'd be looking at the plug wires or coil. I'd check plug
>> >> >> wires if there was a distributor, or I'd look at the coil if there was a
>> >> >> separate coil for each cylinder, or a coil for every two cylinders.
>> >> >>
>> >> >>
>> >> >>
>> >> >> "01XJ" <adam.tsacoumangos@gmail.com> wrote in message
>> >> >> news:1167779855.090317.153570@v33g2000cwv.googlegr oups.com...
>> >> >>>I just started experiencing a rough idle on my 2001 Cherokee (78k
>> >> >>> miles). My engine light went on a little after that with the P0303
>> >> >>> code. I just replaced the spark plugs, but that didn't help anything.
>> >> >>> I was
>> >> >>> thinking about changing the ignition coil or fuel injector. One other
>> >> >>> possibility I was
>> >> >>> thinking was checking the cylinder compression (maybe a gasket leak?).
>> >> >>> Anyone have any suggestions?
>> >> >>>
>> >> >>
>> >> >
>> >> >

Re: P0303 cylinder #3 misfire
 

One connector, 4 wires. 12v in and 3 driver wires.

On Sun, 07 Jan 2007 12:05:11 -0500, Mike Romain <romainm@sympatico.ca>
wrote:

>Ok, but for one coil power two cylinders I would think there is one
>input connection on the coil to rail and one connection going to each
>plug with a connection at each plug, no?
>
>Haven't seen the setup yet.
>
>Mike
>
>bllsht wrote:
>>
>> A bad connection would kill either 2 or all cylinders.
>>
>> On Sat, 06 Jan 2007 20:32:50 -0500, Mike Romain <romainm@sympatico.ca>
>> wrote:
>>
>> >Or it's electronic plug and socket are dirty.....
>> >
>> >Mike
>> >
>> >Jeff Strickland wrote:
>> >>
>> >> So, one of the coils is bad.
>> >>
>> >> "Carl" <carlsaiyed@hotmailREMOVE.com> wrote in message
>> >> news:bdqdnb4NANz57QHYnZ2dnUVZ_tOmnZ2d@comcast.com. ..
>> >> > Jeff, no plug wires or dist cap on an 00 and 01. Coil rail with three coil
>> >> > packs.
>> >> >
>> >> > Carl
>> >> >
>> >> >
>> >> > "Jeff Strickland" <crwlr@yahoo.com> wrote in message
>> >> > news:OfidnY5u3NmnmQHYnZ2dnUVZ_h6jnZ2d@ez2.net...
>> >> >> With a misfire, I'd be looking at the plug wires or coil. I'd check plug
>> >> >> wires if there was a distributor, or I'd look at the coil if there was a
>> >> >> separate coil for each cylinder, or a coil for every two cylinders.
>> >> >>
>> >> >>
>> >> >>
>> >> >> "01XJ" <adam.tsacoumangos@gmail.com> wrote in message
>> >> >> news:1167779855.090317.153570@v33g2000cwv.googlegr oups.com...
>> >> >>>I just started experiencing a rough idle on my 2001 Cherokee (78k
>> >> >>> miles). My engine light went on a little after that with the P0303
>> >> >>> code. I just replaced the spark plugs, but that didn't help anything.
>> >> >>> I was
>> >> >>> thinking about changing the ignition coil or fuel injector. One other
>> >> >>> possibility I was
>> >> >>> thinking was checking the cylinder compression (maybe a gasket leak?).
>> >> >>> Anyone have any suggestions?
>> >> >>>
>> >> >>
>> >> >
>> >> >

Re: P0303 cylinder #3 misfire
 

What connects the spark plugs to this pack?

Thanks,

Mike

bllsht wrote:
>
> One connector, 4 wires. 12v in and 3 driver wires.
>
> On Sun, 07 Jan 2007 12:05:11 -0500, Mike Romain <romainm@sympatico.ca>
> wrote:
>
> >Ok, but for one coil power two cylinders I would think there is one
> >input connection on the coil to rail and one connection going to each
> >plug with a connection at each plug, no?
> >
> >Haven't seen the setup yet.
> >
> >Mike
> >
> >bllsht wrote:
> >>
> >> A bad connection would kill either 2 or all cylinders.
> >>
> >> On Sat, 06 Jan 2007 20:32:50 -0500, Mike Romain <romainm@sympatico.ca>
> >> wrote:
> >>
> >> >Or it's electronic plug and socket are dirty.....
> >> >
> >> >Mike
> >> >
> >> >Jeff Strickland wrote:
> >> >>
> >> >> So, one of the coils is bad.
> >> >>
> >> >> "Carl" <carlsaiyed@hotmailREMOVE.com> wrote in message
> >> >> news:bdqdnb4NANz57QHYnZ2dnUVZ_tOmnZ2d@comcast.com. ..
> >> >> > Jeff, no plug wires or dist cap on an 00 and 01. Coil rail with three coil
> >> >> > packs.
> >> >> >
> >> >> > Carl
> >> >> >
> >> >> >
> >> >> > "Jeff Strickland" <crwlr@yahoo.com> wrote in message
> >> >> > news:OfidnY5u3NmnmQHYnZ2dnUVZ_h6jnZ2d@ez2.net...
> >> >> >> With a misfire, I'd be looking at the plug wires or coil. I'd check plug
> >> >> >> wires if there was a distributor, or I'd look at the coil if there was a
> >> >> >> separate coil for each cylinder, or a coil for every two cylinders.
> >> >> >>
> >> >> >>
> >> >> >>
> >> >> >> "01XJ" <adam.tsacoumangos@gmail.com> wrote in message
> >> >> >> news:1167779855.090317.153570@v33g2000cwv.googlegr oups.com...
> >> >> >>>I just started experiencing a rough idle on my 2001 Cherokee (78k
> >> >> >>> miles). My engine light went on a little after that with the P0303
> >> >> >>> code. I just replaced the spark plugs, but that didn't help anything.
> >> >> >>> I was
> >> >> >>> thinking about changing the ignition coil or fuel injector. One other
> >> >> >>> possibility I was
> >> >> >>> thinking was checking the cylinder compression (maybe a gasket leak?).
> >> >> >>> Anyone have any suggestions?
> >> >> >>>
> >> >> >>
> >> >> >
> >> >> >

Re: P0303 cylinder #3 misfire
 

What connects the spark plugs to this pack?

Thanks,

Mike

bllsht wrote:
>
> One connector, 4 wires. 12v in and 3 driver wires.
>
> On Sun, 07 Jan 2007 12:05:11 -0500, Mike Romain <romainm@sympatico.ca>
> wrote:
>
> >Ok, but for one coil power two cylinders I would think there is one
> >input connection on the coil to rail and one connection going to each
> >plug with a connection at each plug, no?
> >
> >Haven't seen the setup yet.
> >
> >Mike
> >
> >bllsht wrote:
> >>
> >> A bad connection would kill either 2 or all cylinders.
> >>
> >> On Sat, 06 Jan 2007 20:32:50 -0500, Mike Romain <romainm@sympatico.ca>
> >> wrote:
> >>
> >> >Or it's electronic plug and socket are dirty.....
> >> >
> >> >Mike
> >> >
> >> >Jeff Strickland wrote:
> >> >>
> >> >> So, one of the coils is bad.
> >> >>
> >> >> "Carl" <carlsaiyed@hotmailREMOVE.com> wrote in message
> >> >> news:bdqdnb4NANz57QHYnZ2dnUVZ_tOmnZ2d@comcast.com. ..
> >> >> > Jeff, no plug wires or dist cap on an 00 and 01. Coil rail with three coil
> >> >> > packs.
> >> >> >
> >> >> > Carl
> >> >> >
> >> >> >
> >> >> > "Jeff Strickland" <crwlr@yahoo.com> wrote in message
> >> >> > news:OfidnY5u3NmnmQHYnZ2dnUVZ_h6jnZ2d@ez2.net...
> >> >> >> With a misfire, I'd be looking at the plug wires or coil. I'd check plug
> >> >> >> wires if there was a distributor, or I'd look at the coil if there was a
> >> >> >> separate coil for each cylinder, or a coil for every two cylinders.
> >> >> >>
> >> >> >>
> >> >> >>
> >> >> >> "01XJ" <adam.tsacoumangos@gmail.com> wrote in message
> >> >> >> news:1167779855.090317.153570@v33g2000cwv.googlegr oups.com...
> >> >> >>>I just started experiencing a rough idle on my 2001 Cherokee (78k
> >> >> >>> miles). My engine light went on a little after that with the P0303
> >> >> >>> code. I just replaced the spark plugs, but that didn't help anything.
> >> >> >>> I was
> >> >> >>> thinking about changing the ignition coil or fuel injector. One other
> >> >> >>> possibility I was
> >> >> >>> thinking was checking the cylinder compression (maybe a gasket leak?).
> >> >> >>> Anyone have any suggestions?
> >> >> >>>
> >> >> >>
> >> >> >
> >> >> >

Re: P0303 cylinder #3 misfire
 

What connects the spark plugs to this pack?

Thanks,

Mike

bllsht wrote:
>
> One connector, 4 wires. 12v in and 3 driver wires.
>
> On Sun, 07 Jan 2007 12:05:11 -0500, Mike Romain <romainm@sympatico.ca>
> wrote:
>
> >Ok, but for one coil power two cylinders I would think there is one
> >input connection on the coil to rail and one connection going to each
> >plug with a connection at each plug, no?
> >
> >Haven't seen the setup yet.
> >
> >Mike
> >
> >bllsht wrote:
> >>
> >> A bad connection would kill either 2 or all cylinders.
> >>
> >> On Sat, 06 Jan 2007 20:32:50 -0500, Mike Romain <romainm@sympatico.ca>
> >> wrote:
> >>
> >> >Or it's electronic plug and socket are dirty.....
> >> >
> >> >Mike
> >> >
> >> >Jeff Strickland wrote:
> >> >>
> >> >> So, one of the coils is bad.
> >> >>
> >> >> "Carl" <carlsaiyed@hotmailREMOVE.com> wrote in message
> >> >> news:bdqdnb4NANz57QHYnZ2dnUVZ_tOmnZ2d@comcast.com. ..
> >> >> > Jeff, no plug wires or dist cap on an 00 and 01. Coil rail with three coil
> >> >> > packs.
> >> >> >
> >> >> > Carl
> >> >> >
> >> >> >
> >> >> > "Jeff Strickland" <crwlr@yahoo.com> wrote in message
> >> >> > news:OfidnY5u3NmnmQHYnZ2dnUVZ_h6jnZ2d@ez2.net...
> >> >> >> With a misfire, I'd be looking at the plug wires or coil. I'd check plug
> >> >> >> wires if there was a distributor, or I'd look at the coil if there was a
> >> >> >> separate coil for each cylinder, or a coil for every two cylinders.
> >> >> >>
> >> >> >>
> >> >> >>
> >> >> >> "01XJ" <adam.tsacoumangos@gmail.com> wrote in message
> >> >> >> news:1167779855.090317.153570@v33g2000cwv.googlegr oups.com...
> >> >> >>>I just started experiencing a rough idle on my 2001 Cherokee (78k
> >> >> >>> miles). My engine light went on a little after that with the P0303
> >> >> >>> code. I just replaced the spark plugs, but that didn't help anything.
> >> >> >>> I was
> >> >> >>> thinking about changing the ignition coil or fuel injector. One other
> >> >> >>> possibility I was
> >> >> >>> thinking was checking the cylinder compression (maybe a gasket leak?).
> >> >> >>> Anyone have any suggestions?
> >> >> >>>
> >> >> >>
> >> >> >
> >> >> >

Re: P0303 cylinder #3 misfire
 

Mike Romain wrote:
> What connects the spark plugs to this pack?

The coil rail.
http://www.4x4xplor.com/coil.html

It looks like the packs are molded into the
rail. That sucks especially if one pack goes bad.

--
DougW

Re: P0303 cylinder #3 misfire
 

Mike Romain wrote:
> What connects the spark plugs to this pack?

The coil rail.
http://www.4x4xplor.com/coil.html

It looks like the packs are molded into the
rail. That sucks especially if one pack goes bad.

--
DougW

Re: P0303 cylinder #3 misfire
 

Mike Romain wrote:
> What connects the spark plugs to this pack?

The coil rail.
http://www.4x4xplor.com/coil.html

It looks like the packs are molded into the
rail. That sucks especially if one pack goes bad.

--
DougW

Re: P0303 cylinder #3 misfire
 

They are connected with plug wires but they are sealed units and
those connections are not accessible, at least on this setup. Still,
one open plug wire would kill 2 cylinders because of the way the
system operates. For each pair of cylinders, one plug is always fired
negatively, and the other positively. That is, one fires from the
center eletrtode to the outer electrode, and the other fires from the
outer to the center. It's a series circuit. Open a series circuit and
no current flows.



On Sun, 07 Jan 2007 15:01:55 -0500, Mike Romain romainm@sympatico.ca>
wrote:

>What connects the spark plugs to this pack?
>
>Thanks,
>
>Mike
>
>bllsht wrote:
>>
>> One connector, 4 wires. 12v in and 3 driver wires.
>>
>> On Sun, 07 Jan 2007 12:05:11 -0500, Mike Romain <romainm@sympatico.ca>
>> wrote:
>>
>> >Ok, but for one coil power two cylinders I would think there is one
>> >input connection on the coil to rail and one connection going to each
>> >plug with a connection at each plug, no?
>> >
>> >Haven't seen the setup yet.
>> >
>> >Mike
>> >
>> >bllsht wrote:
>> >>
>> >> A bad connection would kill either 2 or all cylinders.
>> >>
>> >> On Sat, 06 Jan 2007 20:32:50 -0500, Mike Romain <romainm@sympatico.ca>
>> >> wrote:
>> >>
>> >> >Or it's electronic plug and socket are dirty.....
>> >> >
>> >> >Mike
>> >> >
>> >> >Jeff Strickland wrote:
>> >> >>
>> >> >> So, one of the coils is bad.
>> >> >>
>> >> >> "Carl" <carlsaiyed@hotmailREMOVE.com> wrote in message
>> >> >> news:bdqdnb4NANz57QHYnZ2dnUVZ_tOmnZ2d@comcast.com. ..
>> >> >> > Jeff, no plug wires or dist cap on an 00 and 01. Coil rail with three coil
>> >> >> > packs.
>> >> >> >
>> >> >> > Carl
>> >> >> >
>> >> >> >
>> >> >> > "Jeff Strickland" <crwlr@yahoo.com> wrote in message
>> >> >> > news:OfidnY5u3NmnmQHYnZ2dnUVZ_h6jnZ2d@ez2.net...
>> >> >> >> With a misfire, I'd be looking at the plug wires or coil. I'd check plug
>> >> >> >> wires if there was a distributor, or I'd look at the coil if there was a
>> >> >> >> separate coil for each cylinder, or a coil for every two cylinders.
>> >> >> >>
>> >> >> >>
>> >> >> >>
>> >> >> >> "01XJ" <adam.tsacoumangos@gmail.com> wrote in message
>> >> >> >> news:1167779855.090317.153570@v33g2000cwv.googlegr oups.com...
>> >> >> >>>I just started experiencing a rough idle on my 2001 Cherokee (78k
>> >> >> >>> miles). My engine light went on a little after that with the P0303
>> >> >> >>> code. I just replaced the spark plugs, but that didn't help anything.
>> >> >> >>> I was
>> >> >> >>> thinking about changing the ignition coil or fuel injector. One other
>> >> >> >>> possibility I was
>> >> >> >>> thinking was checking the cylinder compression (maybe a gasket leak?).
>> >> >> >>> Anyone have any suggestions?
>> >> >> >>>
>> >> >> >>
>> >> >> >
>> >> >> >

Re: P0303 cylinder #3 misfire
 

They are connected with plug wires but they are sealed units and
those connections are not accessible, at least on this setup. Still,
one open plug wire would kill 2 cylinders because of the way the
system operates. For each pair of cylinders, one plug is always fired
negatively, and the other positively. That is, one fires from the
center eletrtode to the outer electrode, and the other fires from the
outer to the center. It's a series circuit. Open a series circuit and
no current flows.



On Sun, 07 Jan 2007 15:01:55 -0500, Mike Romain romainm@sympatico.ca>
wrote:

>What connects the spark plugs to this pack?
>
>Thanks,
>
>Mike
>
>bllsht wrote:
>>
>> One connector, 4 wires. 12v in and 3 driver wires.
>>
>> On Sun, 07 Jan 2007 12:05:11 -0500, Mike Romain <romainm@sympatico.ca>
>> wrote:
>>
>> >Ok, but for one coil power two cylinders I would think there is one
>> >input connection on the coil to rail and one connection going to each
>> >plug with a connection at each plug, no?
>> >
>> >Haven't seen the setup yet.
>> >
>> >Mike
>> >
>> >bllsht wrote:
>> >>
>> >> A bad connection would kill either 2 or all cylinders.
>> >>
>> >> On Sat, 06 Jan 2007 20:32:50 -0500, Mike Romain <romainm@sympatico.ca>
>> >> wrote:
>> >>
>> >> >Or it's electronic plug and socket are dirty.....
>> >> >
>> >> >Mike
>> >> >
>> >> >Jeff Strickland wrote:
>> >> >>
>> >> >> So, one of the coils is bad.
>> >> >>
>> >> >> "Carl" <carlsaiyed@hotmailREMOVE.com> wrote in message
>> >> >> news:bdqdnb4NANz57QHYnZ2dnUVZ_tOmnZ2d@comcast.com. ..
>> >> >> > Jeff, no plug wires or dist cap on an 00 and 01. Coil rail with three coil
>> >> >> > packs.
>> >> >> >
>> >> >> > Carl
>> >> >> >
>> >> >> >
>> >> >> > "Jeff Strickland" <crwlr@yahoo.com> wrote in message
>> >> >> > news:OfidnY5u3NmnmQHYnZ2dnUVZ_h6jnZ2d@ez2.net...
>> >> >> >> With a misfire, I'd be looking at the plug wires or coil. I'd check plug
>> >> >> >> wires if there was a distributor, or I'd look at the coil if there was a
>> >> >> >> separate coil for each cylinder, or a coil for every two cylinders.
>> >> >> >>
>> >> >> >>
>> >> >> >>
>> >> >> >> "01XJ" <adam.tsacoumangos@gmail.com> wrote in message
>> >> >> >> news:1167779855.090317.153570@v33g2000cwv.googlegr oups.com...
>> >> >> >>>I just started experiencing a rough idle on my 2001 Cherokee (78k
>> >> >> >>> miles). My engine light went on a little after that with the P0303
>> >> >> >>> code. I just replaced the spark plugs, but that didn't help anything.
>> >> >> >>> I was
>> >> >> >>> thinking about changing the ignition coil or fuel injector. One other
>> >> >> >>> possibility I was
>> >> >> >>> thinking was checking the cylinder compression (maybe a gasket leak?).
>> >> >> >>> Anyone have any suggestions?
>> >> >> >>>
>> >> >> >>
>> >> >> >
>> >> >> >