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I have the code po171 and p0300

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i have the code po171 and p0300
Submitted: 10 months ago.Category: Chevy
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1/3/2017
Chevy Mechanic: Dan, Technician replied 10 months ago
Dan
Dan, Technician
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Hello, my name is ***** ***** I'm here to help get your problem solved.

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Chevy Mechanic: Dan, Technician replied 10 months ago

Has anything been replaced? Does it lack power under hard acceleration or idle rough?

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Customer reply replied 10 months ago
idles rough replaced o2 sensor bank 1 sensor 1 an 2 cleaned mass airflow senor
Chevy Mechanic: Dan, Technician replied 10 months ago

Rough idle indicates vacuum leak or possibly clogged injector. You can use carb cleaner to spray around intake gaskets, throttle body gasket, vacuum lines ect to see if idle changes. If idle changes check for vacuum leaks in area you are spraying. If you are pretty certain there are no leaks I'd have injectors tested. Let me know if you have questions, thanks.

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