98 ZJ 5.9 Limited, idle observation

Nov 03, 2003 3 Replies

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Bardsleybears 22 years ago

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?

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DougW 22 years ago

Bardsleybears did pass the time by typing:

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.

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's the 4.0 TB, but they are all the same.

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Mike Romain 22 years ago

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:

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L.W.(ßill) 22 years ago

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