98 Cherokee 4L I6 hesitates when cold
01-15-2005, 01:46 PM
#11
Guest
Posts: n/a
Re: 98 Cherokee 4L I6 hesitates when cold
There are a couple plugs and sockets on the throttle body. Opening
these and cleaning the pins with a spray contact cleaner or even WD40
can do wonders for cold idles. One is the TPS or throttle position
sensor. Ours in an 88 and I need to clean it every couple years.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
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.
these and cleaning the pins with a spray contact cleaner or even WD40
can do wonders for cold idles. One is the TPS or throttle position
sensor. Ours in an 88 and I need to clean it every couple years.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
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.
01-15-2005, 01:46 PM
#12
Guest
Posts: n/a
Re: 98 Cherokee 4L I6 hesitates when cold
There are a couple plugs and sockets on the throttle body. Opening
these and cleaning the pins with a spray contact cleaner or even WD40
can do wonders for cold idles. One is the TPS or throttle position
sensor. Ours in an 88 and I need to clean it every couple years.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
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.
these and cleaning the pins with a spray contact cleaner or even WD40
can do wonders for cold idles. One is the TPS or throttle position
sensor. Ours in an 88 and I need to clean it every couple years.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
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.
01-15-2005, 01:46 PM
#13
Guest
Posts: n/a
Re: 98 Cherokee 4L I6 hesitates when cold
There are a couple plugs and sockets on the throttle body. Opening
these and cleaning the pins with a spray contact cleaner or even WD40
can do wonders for cold idles. One is the TPS or throttle position
sensor. Ours in an 88 and I need to clean it every couple years.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
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.
these and cleaning the pins with a spray contact cleaner or even WD40
can do wonders for cold idles. One is the TPS or throttle position
sensor. Ours in an 88 and I need to clean it every couple years.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
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.
01-15-2005, 07:43 PM
#14
Guest
Posts: n/a
Re: 98 Cherokee 4L I6 hesitates when cold
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.
--
Will Honea
> 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.
--
Will Honea
01-15-2005, 07:43 PM
#15
Guest
Posts: n/a
Re: 98 Cherokee 4L I6 hesitates when cold
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.
--
Will Honea
> 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.
--
Will Honea
01-15-2005, 07:43 PM
#16
Guest
Posts: n/a
Re: 98 Cherokee 4L I6 hesitates when cold
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.
--
Will Honea
> 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.
--
Will Honea
01-15-2005, 08:20 PM
#17
Guest
Posts: n/a
Re: 98 Cherokee 4L I6 hesitates when cold
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
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
01-15-2005, 08:20 PM
#18
Guest
Posts: n/a
Re: 98 Cherokee 4L I6 hesitates when cold
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
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
01-15-2005, 08:20 PM
#19
Guest
Posts: n/a
Re: 98 Cherokee 4L I6 hesitates when cold
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
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
01-15-2005, 08:31 PM
#20
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.
>