Running lean

2001 NISSAN MAXIMA
144,000 MILES • 3.0L • 6 CYL • FWD • MANUAL
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BEN95
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My 02 sensors are not reading causing my car to run lean. What could it be.
Feb 2, 2016 at 10:36 AM
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HMAC300
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check fuel pressure with a gauge autoparts rent it.
Feb 2, 2016 at 12:08 PM
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BEN95
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And it also seems likes its misfiring at idle
Feb 2, 2016 at 12:23 PM
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HMAC300
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check for a vacuum leak as well then have it scanned for codes.
Feb 2, 2016 at 12:27 PM
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BEN95
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I scanned it and no codes come up. But it does sound like a slight air leak coming from the backside of the plastic upper intake. But sprayed with brake clean and no difference in idle
Feb 2, 2016 at 12:29 PM
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HMAC300
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do what I said in both replies
Feb 2, 2016 at 12:32 PM