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noodles5124 06-25-2013 04:30 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:
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 06:07 AM

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

noodles5124 06-25-2013 07:07 AM

Anyway to test it without swapping in a new one?

cruiser54 06-25-2013 07:18 AM


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 07:27 AM

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

The time now is 08:40 AM.

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