98 Cherokee 4L I6 hesitates when cold
01-15-2005, 08:31 PM
#21
Guest
Posts: n/a
Re: 98 Cherokee 4L I6 hesitates when cold
I will third this opinion on spark plugs, I would recommend a "normal"
plug. I've had good luck with normal Bosch plugs in other cars but only
had good luck with Bosch Platinums in a VW. The other times that I
personally tried them (until I wised up) I always eventually had misfire
problems. Must be my selection of vehicles:) I've always had good luck
with plain old Champions in Jeeps and other Chrysler vehicles.
Regarding hesitation when cold, I would recommend checking all the
vacuum lines. When I checked them on my '93 GC last summer a bunch of
them were hard and/or cracked. I replaced them all and my GC seemed to
run better especially right after start up.
WB
Will Honea wrote:
> On Sat, 15 Jan 2005 18:02:45 UTC googleid2003@yahoo.com wrote:
>
>
>>Thanks for the replies. I pulled the plugs out last night just to
>>check (Bosch Platinums) and they look fine. After reading that some
>>people didn't like them, I considered switching, but they look great
>>and they've been fine for over a year. I'll see how it runs for a day
>>or two, and if it doesn't go away, I guess I'll take it in. I'm no
>>mechanic.
>
>
> I've had some of the Bosch Platinums break down internally - no
> external sign of damage. They usually would misfire only under heavy
> load (slowly getting worse) and were not carboned up like you would
> expect from a bad plug. Almost impossible to diagnose. At least when
> the Champions fail, they fail completely so you can tell which is
> which.
>
plug. I've had good luck with normal Bosch plugs in other cars but only
had good luck with Bosch Platinums in a VW. The other times that I
personally tried them (until I wised up) I always eventually had misfire
problems. Must be my selection of vehicles:) I've always had good luck
with plain old Champions in Jeeps and other Chrysler vehicles.
Regarding hesitation when cold, I would recommend checking all the
vacuum lines. When I checked them on my '93 GC last summer a bunch of
them were hard and/or cracked. I replaced them all and my GC seemed to
run better especially right after start up.
WB
Will Honea wrote:
> On Sat, 15 Jan 2005 18:02:45 UTC googleid2003@yahoo.com wrote:
>
>
>>Thanks for the replies. I pulled the plugs out last night just to
>>check (Bosch Platinums) and they look fine. After reading that some
>>people didn't like them, I considered switching, but they look great
>>and they've been fine for over a year. I'll see how it runs for a day
>>or two, and if it doesn't go away, I guess I'll take it in. I'm no
>>mechanic.
>
>
> I've had some of the Bosch Platinums break down internally - no
> external sign of damage. They usually would misfire only under heavy
> load (slowly getting worse) and were not carboned up like you would
> expect from a bad plug. Almost impossible to diagnose. At least when
> the Champions fail, they fail completely so you can tell which is
> which.
>
01-15-2005, 08:31 PM
#22
Guest
Posts: n/a
Re: 98 Cherokee 4L I6 hesitates when cold
I will third this opinion on spark plugs, I would recommend a "normal"
plug. I've had good luck with normal Bosch plugs in other cars but only
had good luck with Bosch Platinums in a VW. The other times that I
personally tried them (until I wised up) I always eventually had misfire
problems. Must be my selection of vehicles:) I've always had good luck
with plain old Champions in Jeeps and other Chrysler vehicles.
Regarding hesitation when cold, I would recommend checking all the
vacuum lines. When I checked them on my '93 GC last summer a bunch of
them were hard and/or cracked. I replaced them all and my GC seemed to
run better especially right after start up.
WB
Will Honea wrote:
> On Sat, 15 Jan 2005 18:02:45 UTC googleid2003@yahoo.com wrote:
>
>
>>Thanks for the replies. I pulled the plugs out last night just to
>>check (Bosch Platinums) and they look fine. After reading that some
>>people didn't like them, I considered switching, but they look great
>>and they've been fine for over a year. I'll see how it runs for a day
>>or two, and if it doesn't go away, I guess I'll take it in. I'm no
>>mechanic.
>
>
> I've had some of the Bosch Platinums break down internally - no
> external sign of damage. They usually would misfire only under heavy
> load (slowly getting worse) and were not carboned up like you would
> expect from a bad plug. Almost impossible to diagnose. At least when
> the Champions fail, they fail completely so you can tell which is
> which.
>
plug. I've had good luck with normal Bosch plugs in other cars but only
had good luck with Bosch Platinums in a VW. The other times that I
personally tried them (until I wised up) I always eventually had misfire
problems. Must be my selection of vehicles:) I've always had good luck
with plain old Champions in Jeeps and other Chrysler vehicles.
Regarding hesitation when cold, I would recommend checking all the
vacuum lines. When I checked them on my '93 GC last summer a bunch of
them were hard and/or cracked. I replaced them all and my GC seemed to
run better especially right after start up.
WB
Will Honea wrote:
> On Sat, 15 Jan 2005 18:02:45 UTC googleid2003@yahoo.com wrote:
>
>
>>Thanks for the replies. I pulled the plugs out last night just to
>>check (Bosch Platinums) and they look fine. After reading that some
>>people didn't like them, I considered switching, but they look great
>>and they've been fine for over a year. I'll see how it runs for a day
>>or two, and if it doesn't go away, I guess I'll take it in. I'm no
>>mechanic.
>
>
> I've had some of the Bosch Platinums break down internally - no
> external sign of damage. They usually would misfire only under heavy
> load (slowly getting worse) and were not carboned up like you would
> expect from a bad plug. Almost impossible to diagnose. At least when
> the Champions fail, they fail completely so you can tell which is
> which.
>
01-16-2005, 10:26 AM
#23
Guest
Posts: n/a
Re: 98 Cherokee 4L I6 hesitates when cold
?????
You talking about me? I think Bosch platinums are junk and have never
seen a Jeep engine run well on them.
The last 1 year old set I tossed in the trash for someone did show signs
of misfire though and still ran like crap when warmed up.
That is why I mentioned the TPS connection. It is more likely to give
cold running issues I would think.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
"L.W.(ßill) ------ III" wrote:
>
> Hi Will,
> Ditto. I'm really surprised Mike thinks they look good. They should
> show obvious signs of misfire fouled:
> http://dodgeram.info/Engine-Gas/Spar...plghnbook.html
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Will Honea wrote:
> >
> > I've had some of the Bosch Platinums break down internally - no
> > external sign of damage. They usually would misfire only under heavy
> > load (slowly getting worse) and were not carboned up like you would
> > expect from a bad plug. Almost impossible to diagnose. At least when
> > the Champions fail, they fail completely so you can tell which is
> > which.
> >
> > --
> > Will Honea
You talking about me? I think Bosch platinums are junk and have never
seen a Jeep engine run well on them.
The last 1 year old set I tossed in the trash for someone did show signs
of misfire though and still ran like crap when warmed up.
That is why I mentioned the TPS connection. It is more likely to give
cold running issues I would think.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
"L.W.(ßill) ------ III" wrote:
>
> Hi Will,
> Ditto. I'm really surprised Mike thinks they look good. They should
> show obvious signs of misfire fouled:
> http://dodgeram.info/Engine-Gas/Spar...plghnbook.html
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Will Honea wrote:
> >
> > I've had some of the Bosch Platinums break down internally - no
> > external sign of damage. They usually would misfire only under heavy
> > load (slowly getting worse) and were not carboned up like you would
> > expect from a bad plug. Almost impossible to diagnose. At least when
> > the Champions fail, they fail completely so you can tell which is
> > which.
> >
> > --
> > Will Honea
01-16-2005, 10:26 AM
#24
Guest
Posts: n/a
Re: 98 Cherokee 4L I6 hesitates when cold
?????
You talking about me? I think Bosch platinums are junk and have never
seen a Jeep engine run well on them.
The last 1 year old set I tossed in the trash for someone did show signs
of misfire though and still ran like crap when warmed up.
That is why I mentioned the TPS connection. It is more likely to give
cold running issues I would think.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
"L.W.(ßill) ------ III" wrote:
>
> Hi Will,
> Ditto. I'm really surprised Mike thinks they look good. They should
> show obvious signs of misfire fouled:
> http://dodgeram.info/Engine-Gas/Spar...plghnbook.html
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Will Honea wrote:
> >
> > I've had some of the Bosch Platinums break down internally - no
> > external sign of damage. They usually would misfire only under heavy
> > load (slowly getting worse) and were not carboned up like you would
> > expect from a bad plug. Almost impossible to diagnose. At least when
> > the Champions fail, they fail completely so you can tell which is
> > which.
> >
> > --
> > Will Honea
You talking about me? I think Bosch platinums are junk and have never
seen a Jeep engine run well on them.
The last 1 year old set I tossed in the trash for someone did show signs
of misfire though and still ran like crap when warmed up.
That is why I mentioned the TPS connection. It is more likely to give
cold running issues I would think.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
"L.W.(ßill) ------ III" wrote:
>
> Hi Will,
> Ditto. I'm really surprised Mike thinks they look good. They should
> show obvious signs of misfire fouled:
> http://dodgeram.info/Engine-Gas/Spar...plghnbook.html
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Will Honea wrote:
> >
> > I've had some of the Bosch Platinums break down internally - no
> > external sign of damage. They usually would misfire only under heavy
> > load (slowly getting worse) and were not carboned up like you would
> > expect from a bad plug. Almost impossible to diagnose. At least when
> > the Champions fail, they fail completely so you can tell which is
> > which.
> >
> > --
> > Will Honea
01-16-2005, 10:26 AM
#25
Guest
Posts: n/a
Re: 98 Cherokee 4L I6 hesitates when cold
?????
You talking about me? I think Bosch platinums are junk and have never
seen a Jeep engine run well on them.
The last 1 year old set I tossed in the trash for someone did show signs
of misfire though and still ran like crap when warmed up.
That is why I mentioned the TPS connection. It is more likely to give
cold running issues I would think.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
"L.W.(ßill) ------ III" wrote:
>
> Hi Will,
> Ditto. I'm really surprised Mike thinks they look good. They should
> show obvious signs of misfire fouled:
> http://dodgeram.info/Engine-Gas/Spar...plghnbook.html
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Will Honea wrote:
> >
> > I've had some of the Bosch Platinums break down internally - no
> > external sign of damage. They usually would misfire only under heavy
> > load (slowly getting worse) and were not carboned up like you would
> > expect from a bad plug. Almost impossible to diagnose. At least when
> > the Champions fail, they fail completely so you can tell which is
> > which.
> >
> > --
> > Will Honea
You talking about me? I think Bosch platinums are junk and have never
seen a Jeep engine run well on them.
The last 1 year old set I tossed in the trash for someone did show signs
of misfire though and still ran like crap when warmed up.
That is why I mentioned the TPS connection. It is more likely to give
cold running issues I would think.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
"L.W.(ßill) ------ III" wrote:
>
> Hi Will,
> Ditto. I'm really surprised Mike thinks they look good. They should
> show obvious signs of misfire fouled:
> http://dodgeram.info/Engine-Gas/Spar...plghnbook.html
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Will Honea wrote:
> >
> > I've had some of the Bosch Platinums break down internally - no
> > external sign of damage. They usually would misfire only under heavy
> > load (slowly getting worse) and were not carboned up like you would
> > expect from a bad plug. Almost impossible to diagnose. At least when
> > the Champions fail, they fail completely so you can tell which is
> > which.
> >
> > --
> > Will Honea
01-16-2005, 02:25 PM
#26
Guest
Posts: n/a
Re: 98 Cherokee 4L I6 hesitates when cold
No, I give you way more credit than that! The Original Poster
signed as Mike.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Mike Romain wrote:
>
> ?????
>
> You talking about me? I think Bosch platinums are junk and have never
> seen a Jeep engine run well on them.
>
> The last 1 year old set I tossed in the trash for someone did show signs
> of misfire though and still ran like crap when warmed up.
>
> That is why I mentioned the TPS connection. It is more likely to give
> cold running issues I would think.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
signed as Mike.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Mike Romain wrote:
>
> ?????
>
> You talking about me? I think Bosch platinums are junk and have never
> seen a Jeep engine run well on them.
>
> The last 1 year old set I tossed in the trash for someone did show signs
> of misfire though and still ran like crap when warmed up.
>
> That is why I mentioned the TPS connection. It is more likely to give
> cold running issues I would think.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
01-16-2005, 02:25 PM
#27
Guest
Posts: n/a
Re: 98 Cherokee 4L I6 hesitates when cold
No, I give you way more credit than that! The Original Poster
signed as Mike.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Mike Romain wrote:
>
> ?????
>
> You talking about me? I think Bosch platinums are junk and have never
> seen a Jeep engine run well on them.
>
> The last 1 year old set I tossed in the trash for someone did show signs
> of misfire though and still ran like crap when warmed up.
>
> That is why I mentioned the TPS connection. It is more likely to give
> cold running issues I would think.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
signed as Mike.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Mike Romain wrote:
>
> ?????
>
> You talking about me? I think Bosch platinums are junk and have never
> seen a Jeep engine run well on them.
>
> The last 1 year old set I tossed in the trash for someone did show signs
> of misfire though and still ran like crap when warmed up.
>
> That is why I mentioned the TPS connection. It is more likely to give
> cold running issues I would think.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
01-16-2005, 02:25 PM
#28
Guest
Posts: n/a
Re: 98 Cherokee 4L I6 hesitates when cold
No, I give you way more credit than that! The Original Poster
signed as Mike.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Mike Romain wrote:
>
> ?????
>
> You talking about me? I think Bosch platinums are junk and have never
> seen a Jeep engine run well on them.
>
> The last 1 year old set I tossed in the trash for someone did show signs
> of misfire though and still ran like crap when warmed up.
>
> That is why I mentioned the TPS connection. It is more likely to give
> cold running issues I would think.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
signed as Mike.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Mike Romain wrote:
>
> ?????
>
> You talking about me? I think Bosch platinums are junk and have never
> seen a Jeep engine run well on them.
>
> The last 1 year old set I tossed in the trash for someone did show signs
> of misfire though and still ran like crap when warmed up.
>
> That is why I mentioned the TPS connection. It is more likely to give
> cold running issues I would think.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
01-16-2005, 05:39 PM
#29
Guest
Posts: n/a
Re: 98 Cherokee 4L I6 hesitates when cold
The plugs really do look good - nice and clean. I haven't had any
problems with them since I put them in over a year ago.
I've taken the jeep around the block a few times in the last few days
when it's cold, and it is running fine. I don't know what the deal was
the other day. If it happens again, I'll take it in. Thanks for the
replies.
Mike
problems with them since I put them in over a year ago.
I've taken the jeep around the block a few times in the last few days
when it's cold, and it is running fine. I don't know what the deal was
the other day. If it happens again, I'll take it in. Thanks for the
replies.
Mike
01-16-2005, 05:39 PM
#30
Guest
Posts: n/a
Re: 98 Cherokee 4L I6 hesitates when cold
The plugs really do look good - nice and clean. I haven't had any
problems with them since I put them in over a year ago.
I've taken the jeep around the block a few times in the last few days
when it's cold, and it is running fine. I don't know what the deal was
the other day. If it happens again, I'll take it in. Thanks for the
replies.
Mike
problems with them since I put them in over a year ago.
I've taken the jeep around the block a few times in the last few days
when it's cold, and it is running fine. I don't know what the deal was
the other day. If it happens again, I'll take it in. Thanks for the
replies.
Mike