98 ZJ 5.9 Limited, idle observation
 

i just picked up after months of looking for a good low miles one, a 98 ZJ
5.9 Limited. notice that when in park, idle is around 800 rpm, if you blip
the throttle it will hold at about 1200-1300 rpm, for a few minutes, then go
back down to normal. Any ideas why?

Re: 98 ZJ 5.9 Limited, idle observation
 

Bardsleybears did pass the time by typing:
> i just picked up after months of looking for a good low miles one, a 98 ZJ
> 5.9 Limited. notice that when in park, idle is around 800 rpm, if you blip
> the throttle it will hold at about 1200-1300 rpm, for a few minutes, then go
> back down to normal. Any ideas why?

Not a clue.




..
..
..



:)

Actually, they all do that to some extent. When it stays there or
has a hard time idling then it's time to clean the IAP (Idle Air Passage)
on the throttle body.

linky --> http://members.cox.net/wilsond/tb/tb.html
That's the 4.0 TB, but they are all the same.

--
DougW

Re: 98 ZJ 5.9 Limited, idle observation
 

Bardsleybears did pass the time by typing:
> i just picked up after months of looking for a good low miles one, a 98 ZJ
> 5.9 Limited. notice that when in park, idle is around 800 rpm, if you blip
> the throttle it will hold at about 1200-1300 rpm, for a few minutes, then go
> back down to normal. Any ideas why?

Not a clue.




..
..
..



:)

Actually, they all do that to some extent. When it stays there or
has a hard time idling then it's time to clean the IAP (Idle Air Passage)
on the throttle body.

linky --> http://members.cox.net/wilsond/tb/tb.html
That's the 4.0 TB, but they are all the same.

--
DougW

Re: 98 ZJ 5.9 Limited, idle observation
 

Bardsleybears did pass the time by typing:
> i just picked up after months of looking for a good low miles one, a 98 ZJ
> 5.9 Limited. notice that when in park, idle is around 800 rpm, if you blip
> the throttle it will hold at about 1200-1300 rpm, for a few minutes, then go
> back down to normal. Any ideas why?

Not a clue.




..
..
..



:)

Actually, they all do that to some extent. When it stays there or
has a hard time idling then it's time to clean the IAP (Idle Air Passage)
on the throttle body.

linky --> http://members.cox.net/wilsond/tb/tb.html
That's the 4.0 TB, but they are all the same.

--
DougW

Re: 98 ZJ 5.9 Limited, idle observation
 

Dirty connection or dirty insides on the TPS?

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Bardsleybears wrote:
>
> i just picked up after months of looking for a good low miles one, a 98 ZJ
> 5.9 Limited. notice that when in park, idle is around 800 rpm, if you blip
> the throttle it will hold at about 1200-1300 rpm, for a few minutes, then go
> back down to normal. Any ideas why?

Re: 98 ZJ 5.9 Limited, idle observation
 

Dirty connection or dirty insides on the TPS?

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Bardsleybears wrote:
>
> i just picked up after months of looking for a good low miles one, a 98 ZJ
> 5.9 Limited. notice that when in park, idle is around 800 rpm, if you blip
> the throttle it will hold at about 1200-1300 rpm, for a few minutes, then go
> back down to normal. Any ideas why?

Re: 98 ZJ 5.9 Limited, idle observation
 

Dirty connection or dirty insides on the TPS?

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Bardsleybears wrote:
>
> i just picked up after months of looking for a good low miles one, a 98 ZJ
> 5.9 Limited. notice that when in park, idle is around 800 rpm, if you blip
> the throttle it will hold at about 1200-1300 rpm, for a few minutes, then go
> back down to normal. Any ideas why?

Re: 98 ZJ 5.9 Limited, idle observation
 

It's Kalifornia SMOGed? It may be a part of the computer's
averaging, like they don't like it when you're continually taping the
accelerator, wasting gas as you travel down the road, so, if you've
noticed you have no engine braking, for many seconds, or until the
computer is sure you really do want to slow down.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Bardsleybears wrote:
>
> i just picked up after months of looking for a good low miles one, a 98 ZJ
> 5.9 Limited. notice that when in park, idle is around 800 rpm, if you blip
> the throttle it will hold at about 1200-1300 rpm, for a few minutes, then go
> back down to normal. Any ideas why?

Re: 98 ZJ 5.9 Limited, idle observation
 

It's Kalifornia SMOGed? It may be a part of the computer's
averaging, like they don't like it when you're continually taping the
accelerator, wasting gas as you travel down the road, so, if you've
noticed you have no engine braking, for many seconds, or until the
computer is sure you really do want to slow down.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Bardsleybears wrote:
>
> i just picked up after months of looking for a good low miles one, a 98 ZJ
> 5.9 Limited. notice that when in park, idle is around 800 rpm, if you blip
> the throttle it will hold at about 1200-1300 rpm, for a few minutes, then go
> back down to normal. Any ideas why?

Re: 98 ZJ 5.9 Limited, idle observation
 

It's Kalifornia SMOGed? It may be a part of the computer's
averaging, like they don't like it when you're continually taping the
accelerator, wasting gas as you travel down the road, so, if you've
noticed you have no engine braking, for many seconds, or until the
computer is sure you really do want to slow down.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Bardsleybears wrote:
>
> i just picked up after months of looking for a good low miles one, a 98 ZJ
> 5.9 Limited. notice that when in park, idle is around 800 rpm, if you blip
> the throttle it will hold at about 1200-1300 rpm, for a few minutes, then go
> back down to normal. Any ideas why?