Lumpy Idle but runs great-Any ideas?

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Jul 24, 2011 | 12:32 AM

#16

94JeepCherokeeMan

CF Veteran

Joined: Jun 2011

Posts: 1,023

Likes: 1

From: Southern Idaho

Year: 1994

Model: Cherokee

Engine: 4.0 L/242 CID I-6 High Output MFI

Jul 24, 2011 | 02:13 AM

#17

Slick761

CF Veteran

Joined: Jun 2011

Posts: 2,858

Likes: 1

From: Nor-Cal

Year: 1990

Model: Cherokee

Engine: The venerable 4.0

Just tell everyone you have a cam with lots of overlap.... then show em how snappy it is off idle :-D that's what I do.... seriously though... one little thing that I did... wiggle the wires on your injector harness ant the injectors themselves.... I find fuel delivery is often the not so obvious problem.

Jul 24, 2011 | 06:32 AM

#18

CattyXJ

Seasoned Member

Joined: Jun 2011

Posts: 287

Likes: 2

From: Catasauqua PA

Year: 1996

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by Bustedback

What could be more simple and cheaper than checking for vacuum leaks? And what is so odd about doing a simple compression test?

Checking for vacuum leaks is easy, and so is a compression test if you have the right equipment. I'm just saying that things like changing plugs, wires, cap and rotor, fuel filter etc. Are all things that should be done yearly that effect the fuel economy and general running state of your vehicle...start with the stuff that yeah, costs at least $30, but I personally would feel pretty dumb doing a compression test only to find out I needed a new distributor cap that costs $12 and requires 5 minutes and a phillips head to install.

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