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-   -   Zj idle issue (http://www.jeepforum.com/forum/f19/zj-idle-issue-1541078/)

noodles5124 06-25-2013 05:30 AM

Zj idle issue
 
So for about a week or so my 4.0 has had a serious idle problem. It's just rough seems like a misfire and does it while driving sometime. Here's is what I've done so far:
Cap,rotor
Plugs,wires
Ignition coil
Pcv breather filter and elbow
Checked vacuum lines
Air filter
Clean tb, iac,tps,and pcm
New fuel filter and added injector cleaner

Now I'm leaning towards fuel pump...any thoughts?

cruiser54 06-25-2013 07:07 AM

With it worse at idle and only intermittent at speed, I'd be leaning towards CPS.

noodles5124 06-25-2013 08:07 AM

Anyway to test it without swapping in a new one?

cruiser54 06-25-2013 08:18 AM

Quote:

Originally Posted by noodles5124 (Post 15604457)
Anyway to test it without swapping in a new one?

Not reliably for intermittent issues. That, and they're a known issue.

noodles5124 06-25-2013 08:27 AM

Thanks for the help ill pick one up later today and post my results...wish me luck lol


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