Very rough idle, acceleration flawless? - Page 9 - Nissan Xterra Forum
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post #81 of 86 Old 10-30-2015, 08:17 PM
bmwbirdman
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Thumbs down Rough idle acceleration clears up

So to save a lot of people out there a lot of wasted money here is what I have tried: replaced intake gaskets, replaced knock sensors, replaced o2 sensors, replaced spark plugs, plugs wires, entire distributor is new, ran cataclean twice, check for blown head gaskets with liquid from autozone says no problems, sent ECM checked out fine, new mass air flow sensor, changed throttle body with one from known good engine. At this point I am finished with this POS for ever. I am selling it cheap at a dealer only auto auction. Good ridens!!!!
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post #82 of 86 Old 12-23-2015, 03:19 PM
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Check the code of the engine. when this happened to me it was the spark plugs. Don't delay on replacing them, my cat went bad after driving around like that for a week
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post #83 of 86 Old 12-27-2015, 12:47 PM
Ken Hardy
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Finally replaced the distributor, air idle control valve, plugs, wires, fuel filter, fuel regulator, clean throttle body, intake, injectors & the truck still runs like crap.
I would think that Nissan would have a bulletin out for this common problem.
My guy seems to think I need to have the valves cleaned. I'm not putting any more money into this truck.
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post #84 of 86 Old 01-03-2016, 02:30 PM
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I poured in some of that Lucus fuel injector cleaner. Big difference in the way the truck is idling now. Much smoother. Still a little hiccup from time to time but nothing like it was before.
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post #85 of 86 Old 06-02-2016, 12:05 AM
gh05tp3da1
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Quote:
Originally Posted by rbrosseau View Post
Hey I'm curious if you have found out what your idling issue was I have a 2002 s/c I just bought with the same problem it only miss fires on the passenger side 3 cylinders. I have tried replacing the catalytic converter spark plugs, wires and distributor with no luck.
Not sure if you figured out the problem with your Xterra yet but...

I had the same symptoms as described here. Started good, warmed up then idled very rough, to the point that it almost stalled. After a good inspection I found that the upper intake manifold gasket in between the supercharger and plenum was blown out causing a huge vacuum leak.

Now I'm not saying that is your problem. But, I do suggest that you have a good look at all your vacuum lines, intake gaskets etc. You more than likely have a leak someplace.

After replacing the upper intake manifold gasket this afternoon, I am happy to say my Xterra is running like a top!

Good luck.
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post #86 of 86 Old 06-20-2016, 12:10 PM
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I had the rough idol problem and I replaced everything you could think of. I took off the big air intake hose to fit the tube for seafoam in the throttle body on the upper intake planium and when I pulled the intake hose. In-between the ridges of the intake hose there were two big cracks in the plastic that were hiding. The MAF sensor would not have detected this leak of air going into the throttle bottle to adjusted the fuel injection. Ergo, the reason for my rough idle was the two cracks that I spent about $500 in personal repair cost (things that would have needed to be replaced anyway) to find.
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