Car idles rough some times

2011 NISSAN FRONTIER
56,600 MILES • V6 • RWD • AUTOMATIC
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NGB5548
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Any ideas as to what would cause a car to run extremely smooth one day, and the next it idles more noticeably? Or is this normal? It is also idling more noticeably when the air is on. Mine does this back and forth and it is worrisome. I just had camshaft sensors replaced and now I am concerned something else is wrong. No codes or SES lights. Acceleration is good. I got the camshaft sensors replaced because I had a few different cranks/no start situations and they could figure anything else that it could be. I am going to try checking the air filter and using a gas cleaner.
Apr 1, 2016 at 6:23 PM
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HMAC300
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try cleaning throttle plate on both sides and iac hole with choke cleaner check for a vacuum leak like broken line, line off etc.
Apr 2, 2016 at 6:51 AM