87 Cherokee 4L idles very fast sometimes
01-30-2005, 07:49 PM
#1
Guest
Posts: n/a
87 Cherokee 4L idles very fast sometimes
Sometimes, cold or warm, my 87 4.0L Cherokee idles as fast as
3,500 RPM. Pulling up on accelerator does not help. O-rings have been
replaced. I was thinking of cleaning contacts on computer and cleaning the
throttle body next. Any other suggestions? Anything else to clean while I have
the TB off? My 87 Clymer shop manual doesn't really have any info on cleaning
the TB
Thanks
Dean
3,500 RPM. Pulling up on accelerator does not help. O-rings have been
replaced. I was thinking of cleaning contacts on computer and cleaning the
throttle body next. Any other suggestions? Anything else to clean while I have
the TB off? My 87 Clymer shop manual doesn't really have any info on cleaning
the TB
Thanks
Dean
01-30-2005, 07:55 PM
#2
Guest
Posts: n/a
Re: 87 Cherokee 4L idles very fast sometimes
Ours does that every couple years and I clean the contacts on all the
switches on the throttle body, particularly the TPS connection with a
spray contact cleaner. WD40 will work in a pinch, but an electronic
cleaner is better.
I then use some spark plug boot protector type dielectric grease on the
plug seal.
Lasts a couple years normally.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
DDKreiter wrote:
>
> Sometimes, cold or warm, my 87 4.0L Cherokee idles as fast as
> 3,500 RPM. Pulling up on accelerator does not help. O-rings have been
> replaced. I was thinking of cleaning contacts on computer and cleaning the
> throttle body next. Any other suggestions? Anything else to clean while I have
> the TB off? My 87 Clymer shop manual doesn't really have any info on cleaning
> the TB
> Thanks
> Dean
switches on the throttle body, particularly the TPS connection with a
spray contact cleaner. WD40 will work in a pinch, but an electronic
cleaner is better.
I then use some spark plug boot protector type dielectric grease on the
plug seal.
Lasts a couple years normally.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
DDKreiter wrote:
>
> Sometimes, cold or warm, my 87 4.0L Cherokee idles as fast as
> 3,500 RPM. Pulling up on accelerator does not help. O-rings have been
> replaced. I was thinking of cleaning contacts on computer and cleaning the
> throttle body next. Any other suggestions? Anything else to clean while I have
> the TB off? My 87 Clymer shop manual doesn't really have any info on cleaning
> the TB
> Thanks
> Dean
01-30-2005, 07:55 PM
#3
Guest
Posts: n/a
Re: 87 Cherokee 4L idles very fast sometimes
Ours does that every couple years and I clean the contacts on all the
switches on the throttle body, particularly the TPS connection with a
spray contact cleaner. WD40 will work in a pinch, but an electronic
cleaner is better.
I then use some spark plug boot protector type dielectric grease on the
plug seal.
Lasts a couple years normally.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
DDKreiter wrote:
>
> Sometimes, cold or warm, my 87 4.0L Cherokee idles as fast as
> 3,500 RPM. Pulling up on accelerator does not help. O-rings have been
> replaced. I was thinking of cleaning contacts on computer and cleaning the
> throttle body next. Any other suggestions? Anything else to clean while I have
> the TB off? My 87 Clymer shop manual doesn't really have any info on cleaning
> the TB
> Thanks
> Dean
switches on the throttle body, particularly the TPS connection with a
spray contact cleaner. WD40 will work in a pinch, but an electronic
cleaner is better.
I then use some spark plug boot protector type dielectric grease on the
plug seal.
Lasts a couple years normally.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
DDKreiter wrote:
>
> Sometimes, cold or warm, my 87 4.0L Cherokee idles as fast as
> 3,500 RPM. Pulling up on accelerator does not help. O-rings have been
> replaced. I was thinking of cleaning contacts on computer and cleaning the
> throttle body next. Any other suggestions? Anything else to clean while I have
> the TB off? My 87 Clymer shop manual doesn't really have any info on cleaning
> the TB
> Thanks
> Dean
01-30-2005, 07:55 PM
#4
Guest
Posts: n/a
Re: 87 Cherokee 4L idles very fast sometimes
Ours does that every couple years and I clean the contacts on all the
switches on the throttle body, particularly the TPS connection with a
spray contact cleaner. WD40 will work in a pinch, but an electronic
cleaner is better.
I then use some spark plug boot protector type dielectric grease on the
plug seal.
Lasts a couple years normally.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
DDKreiter wrote:
>
> Sometimes, cold or warm, my 87 4.0L Cherokee idles as fast as
> 3,500 RPM. Pulling up on accelerator does not help. O-rings have been
> replaced. I was thinking of cleaning contacts on computer and cleaning the
> throttle body next. Any other suggestions? Anything else to clean while I have
> the TB off? My 87 Clymer shop manual doesn't really have any info on cleaning
> the TB
> Thanks
> Dean
switches on the throttle body, particularly the TPS connection with a
spray contact cleaner. WD40 will work in a pinch, but an electronic
cleaner is better.
I then use some spark plug boot protector type dielectric grease on the
plug seal.
Lasts a couple years normally.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
DDKreiter wrote:
>
> Sometimes, cold or warm, my 87 4.0L Cherokee idles as fast as
> 3,500 RPM. Pulling up on accelerator does not help. O-rings have been
> replaced. I was thinking of cleaning contacts on computer and cleaning the
> throttle body next. Any other suggestions? Anything else to clean while I have
> the TB off? My 87 Clymer shop manual doesn't really have any info on cleaning
> the TB
> Thanks
> Dean
01-30-2005, 08:06 PM
#5
Guest
Posts: n/a
Re: 87 Cherokee 4L idles very fast sometimes
Hi Dean,
That's what to do next, as the Throttle Position Sensor and fast
idle Step Motor are located on it:
http://members.***.net/wilsond/tb/tb.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
DDKreiter wrote:
>
> Sometimes, cold or warm, my 87 4.0L Cherokee idles as fast as
> 3,500 RPM. Pulling up on accelerator does not help. O-rings have been
> replaced. I was thinking of cleaning contacts on computer and cleaning the
> throttle body next. Any other suggestions? Anything else to clean while I have
> the TB off? My 87 Clymer shop manual doesn't really have any info on cleaning
> the TB
> Thanks
> Dean
That's what to do next, as the Throttle Position Sensor and fast
idle Step Motor are located on it:
http://members.***.net/wilsond/tb/tb.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
DDKreiter wrote:
>
> Sometimes, cold or warm, my 87 4.0L Cherokee idles as fast as
> 3,500 RPM. Pulling up on accelerator does not help. O-rings have been
> replaced. I was thinking of cleaning contacts on computer and cleaning the
> throttle body next. Any other suggestions? Anything else to clean while I have
> the TB off? My 87 Clymer shop manual doesn't really have any info on cleaning
> the TB
> Thanks
> Dean
01-30-2005, 08:06 PM
#6
Guest
Posts: n/a
Re: 87 Cherokee 4L idles very fast sometimes
Hi Dean,
That's what to do next, as the Throttle Position Sensor and fast
idle Step Motor are located on it:
http://members.***.net/wilsond/tb/tb.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
DDKreiter wrote:
>
> Sometimes, cold or warm, my 87 4.0L Cherokee idles as fast as
> 3,500 RPM. Pulling up on accelerator does not help. O-rings have been
> replaced. I was thinking of cleaning contacts on computer and cleaning the
> throttle body next. Any other suggestions? Anything else to clean while I have
> the TB off? My 87 Clymer shop manual doesn't really have any info on cleaning
> the TB
> Thanks
> Dean
That's what to do next, as the Throttle Position Sensor and fast
idle Step Motor are located on it:
http://members.***.net/wilsond/tb/tb.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
DDKreiter wrote:
>
> Sometimes, cold or warm, my 87 4.0L Cherokee idles as fast as
> 3,500 RPM. Pulling up on accelerator does not help. O-rings have been
> replaced. I was thinking of cleaning contacts on computer and cleaning the
> throttle body next. Any other suggestions? Anything else to clean while I have
> the TB off? My 87 Clymer shop manual doesn't really have any info on cleaning
> the TB
> Thanks
> Dean
01-30-2005, 08:06 PM
#7
Guest
Posts: n/a
Re: 87 Cherokee 4L idles very fast sometimes
Hi Dean,
That's what to do next, as the Throttle Position Sensor and fast
idle Step Motor are located on it:
http://members.***.net/wilsond/tb/tb.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
DDKreiter wrote:
>
> Sometimes, cold or warm, my 87 4.0L Cherokee idles as fast as
> 3,500 RPM. Pulling up on accelerator does not help. O-rings have been
> replaced. I was thinking of cleaning contacts on computer and cleaning the
> throttle body next. Any other suggestions? Anything else to clean while I have
> the TB off? My 87 Clymer shop manual doesn't really have any info on cleaning
> the TB
> Thanks
> Dean
That's what to do next, as the Throttle Position Sensor and fast
idle Step Motor are located on it:
http://members.***.net/wilsond/tb/tb.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
DDKreiter wrote:
>
> Sometimes, cold or warm, my 87 4.0L Cherokee idles as fast as
> 3,500 RPM. Pulling up on accelerator does not help. O-rings have been
> replaced. I was thinking of cleaning contacts on computer and cleaning the
> throttle body next. Any other suggestions? Anything else to clean while I have
> the TB off? My 87 Clymer shop manual doesn't really have any info on cleaning
> the TB
> Thanks
> Dean
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