Ditto on the Autolite platinum plugs. That is what I will stay with in my
4.0L.

I used Autolite plugs for many years before trying both the Bosch Plus4 and
the Spitfire plugs. Neither one measured up to the Autolite plugs in this
engine, so I'm back to the Autolites.

Terry
92YJ
200,850 miles original 4.0L



"Jerry Bransford" <jerrypb@mecox.net> wrote in message
news:kqRDb.18607$gN.10804@fed1read05...
> I run nothing but Autolite platinum-tipped plugs and in probably nearly
> 200,000 miles of running them in two 4.0L equipped Jeeps, they've never
> fouled. A fouled plug is a result of either something wrong with the
engine
> or the wrong temperature plug was installed. One thing for sure,
Autolites
> do not have a reputation for fouling in 4.0L engines. About the only two
> plugs that don't have good reputations in the Jeep would be the Bosch
Plus4
> and, of course, Splitfire snakeoil plugs. :)
>
> Jerry
> --
> Jerry Bransford
> To email, remove 'me' from my email address
> KC6TAY, PP-ASEL
> See the Geezer Jeep at
> http://members.***.net/jerrypb/
>
> "mic canic" <dbrider@cac.net> wrote in message
> news:3FDFBFB6.707C19DD@cac.net...
> > stay with the champs or better yet get the new ngk plugs but stay away
> from autolites they foul a
> > lot easier than champs
> >
> > Ender wrote:
> >
> > > I have had numerous people tell me to dump the stock Champion
> > > (RC12ECC) spark plugs and replace them with Autollite 985 plugs. It
> > > is my understanding that the Autolites use a 5k resistor for ignition
> > > supression while the Champion uses some type of solid state device
> > > instead. Any issues with swapping the Champions out with the
> > > Autolites? (One of the "new" Champion plugs the dealer put in during
> > > a recent tuneup has an obvious crack in the insulator body, which
> > > seems to be the source of the recent ignition noise in my radio gear.)
> > >
> > > Thanks for any input.
> > >
> > > Ender
> > >
> > > 99 Cherokee 4.0L
> > > Distributor type ignition
> > >
> > > "The only thing necessary for the triumph of evil is for good men to
do
> nothing." Edmund Burke
> >
>
>

 

Ditto on the Autolite platinum plugs. That is what I will stay with in my
4.0L.

I used Autolite plugs for many years before trying both the Bosch Plus4 and
the Spitfire plugs. Neither one measured up to the Autolite plugs in this
engine, so I'm back to the Autolites.

Terry
92YJ
200,850 miles original 4.0L



"Jerry Bransford" <jerrypb@mecox.net> wrote in message
news:kqRDb.18607$gN.10804@fed1read05...
> I run nothing but Autolite platinum-tipped plugs and in probably nearly
> 200,000 miles of running them in two 4.0L equipped Jeeps, they've never
> fouled. A fouled plug is a result of either something wrong with the
engine
> or the wrong temperature plug was installed. One thing for sure,
Autolites
> do not have a reputation for fouling in 4.0L engines. About the only two
> plugs that don't have good reputations in the Jeep would be the Bosch
Plus4
> and, of course, Splitfire snakeoil plugs. :)
>
> Jerry
> --
> Jerry Bransford
> To email, remove 'me' from my email address
> KC6TAY, PP-ASEL
> See the Geezer Jeep at
> http://members.***.net/jerrypb/
>
> "mic canic" <dbrider@cac.net> wrote in message
> news:3FDFBFB6.707C19DD@cac.net...
> > stay with the champs or better yet get the new ngk plugs but stay away
> from autolites they foul a
> > lot easier than champs
> >
> > Ender wrote:
> >
> > > I have had numerous people tell me to dump the stock Champion
> > > (RC12ECC) spark plugs and replace them with Autollite 985 plugs. It
> > > is my understanding that the Autolites use a 5k resistor for ignition
> > > supression while the Champion uses some type of solid state device
> > > instead. Any issues with swapping the Champions out with the
> > > Autolites? (One of the "new" Champion plugs the dealer put in during
> > > a recent tuneup has an obvious crack in the insulator body, which
> > > seems to be the source of the recent ignition noise in my radio gear.)
> > >
> > > Thanks for any input.
> > >
> > > Ender
> > >
> > > 99 Cherokee 4.0L
> > > Distributor type ignition
> > >
> > > "The only thing necessary for the triumph of evil is for good men to
do
> nothing." Edmund Burke
> >
>
>

 

Thank you all for your responses.

Regards,

Ender

"The only thing necessary for the triumph of evil is for good men to do nothing." Edmund Burke

 

Thank you all for your responses.

Regards,

Ender

"The only thing necessary for the triumph of evil is for good men to do nothing." Edmund Burke

 

Thank you all for your responses.

Regards,

Ender

"The only thing necessary for the triumph of evil is for good men to do nothing." Edmund Burke

 

Funny, I was told the Champion Truck Plug was the best thing to put in my
2.5L. I thought I heard that from some people on this list, actually. I
haven't pulled them since installing them, so I don't know what they look
like.

Eric
99 TJ SE
"SP Cook" <pacefsc@msn.com> wrote in message
news:da11e11e.0312170432.1dbf99b1@posting.google.c om...
> Ender <enderwiggin3rd@SBhotmail.com> wrote in message
>
> > I have had numerous people tell me to dump the stock Champion
> > (RC12ECC) spark plugs and replace them with Autollite 985 plugs.
>
> First rule of spark plugs: If it doesn't start with a pull cord and
> have a blade under it, don't use Champions in it.
>
> Buy as set of Bosch Platinum Plus 4s. Worth every cent.

 

Funny, I was told the Champion Truck Plug was the best thing to put in my
2.5L. I thought I heard that from some people on this list, actually. I
haven't pulled them since installing them, so I don't know what they look
like.

Eric
99 TJ SE
"SP Cook" <pacefsc@msn.com> wrote in message
news:da11e11e.0312170432.1dbf99b1@posting.google.c om...
> Ender <enderwiggin3rd@SBhotmail.com> wrote in message
>
> > I have had numerous people tell me to dump the stock Champion
> > (RC12ECC) spark plugs and replace them with Autollite 985 plugs.
>
> First rule of spark plugs: If it doesn't start with a pull cord and
> have a blade under it, don't use Champions in it.
>
> Buy as set of Bosch Platinum Plus 4s. Worth every cent.

 

Funny, I was told the Champion Truck Plug was the best thing to put in my
2.5L. I thought I heard that from some people on this list, actually. I
haven't pulled them since installing them, so I don't know what they look
like.

Eric
99 TJ SE
"SP Cook" <pacefsc@msn.com> wrote in message
news:da11e11e.0312170432.1dbf99b1@posting.google.c om...
> Ender <enderwiggin3rd@SBhotmail.com> wrote in message
>
> > I have had numerous people tell me to dump the stock Champion
> > (RC12ECC) spark plugs and replace them with Autollite 985 plugs.
>
> First rule of spark plugs: If it doesn't start with a pull cord and
> have a blade under it, don't use Champions in it.
>
> Buy as set of Bosch Platinum Plus 4s. Worth every cent.