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Mike V.
Mike V., Nissan Technician
Category: Nissan
Satisfied Customers: 25034
Experience:  Nissan factory trained and Certified Subaru Technician.
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I have an 05 armada I had both cats changed and I have rough

Customer Question

I have an 05 armada I had both cats changed and I have rough idle
Submitted: 1 year ago.
Category: Nissan
Expert:  Mike V. replied 1 year ago.

Hi there,

Is the check engine light on still with a misfire code?
Also, how long ago was the work on the converters done.

Customer: replied 1 year ago.
About two weeks ago and i had cats changed two weeka ago as well
Customer: replied 1 year ago.
check engine light is on
Expert:  Mike V. replied 1 year ago.

Ok are you still getting the #2 misfire code?

Customer: replied 1 year ago.
Expert:  Mike V. replied 1 year ago.

Ok, I would start by swapping the #2 coil with the one next to it and see if the misfire moves with it. If it does, then you know the coil is bad. If not, then I would check for an intake manifold leak. To do this, fire the truck up and spray some carb cleaner along the intake. If the idle smooths out or speeds up then you have a leak, if nothing changes, then you should do a leak down test on #2. Also, check the spark plug when doing that. You may have some low compression or carbon buildup on cylinder #2 from the converter failing.

Please let me know if there is any more I can do to help you from here.

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Customer: replied 1 year ago.
The spark plug wasn't tighten and it was wet could that be a problem
Expert:  Mike V. replied 1 year ago.

Yes, that can cause the problem because it's affecting the grounding for the spark plug. It's wet because of the fuel that isn't burning. You may have to replace the plug if it's fouled, but otherwise tighten it up and run the truck, it might clean itself up.

Customer: replied 1 year ago.
Thanks I'll try that
Expert:  Mike V. replied 1 year ago.

You are very welcome, please let me know

Customer: replied 1 year ago.
Hello again Mr. Mike, there are no codes showing anymore but there is still slight idle only when stopped and my fuel gauge not registering correctly could this associated as well
Expert:  Mike V. replied 1 year ago.

It sounds like we have resolved the original condition which was the misfire. I would try some fuel injector cleaner now to help smooth things out. It's possible there is some carbon built up on the valves where the misfire was occurring. As for the fuel gauge, this is not a factor and a common problem on this model year. Most often the fuel sending unit must be replaced to solve the problem.

Customer: replied 1 year ago.
Thanks again for all your help and time
Expert:  Mike V. replied 1 year ago.

You are very welcome, please remember to rate my service and please be sure to let me know if there is anything more I can do to help.