P0171
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Joined: Apr 2009
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P0171
I have 2007 explorer with the 4.6 v8
Recently it started running horrible. Rough idle, drives badly, hesitation, etc.
check engine light is on, code P0171. I cannot find a vacuum leak, and i am pretty much at a loss.
Before it started running poorly i replaced the thermostat, and flushed the coolant. i am assuming this is a coincidence.
Thanks for any advise
Recently it started running horrible. Rough idle, drives badly, hesitation, etc.
check engine light is on, code P0171. I cannot find a vacuum leak, and i am pretty much at a loss.
Before it started running poorly i replaced the thermostat, and flushed the coolant. i am assuming this is a coincidence.
Thanks for any advise
Logistics Pro
Joined: Jun 2009
Posts: 4,818
Likes: 83
From: Cedar Rapids, IA
You probably had the air intake tubing loose to replace the thermostat, correct? I'd start by confirming that all the intake air tubing between the MAF sensor and the throttle body is properly and securely installed. An air leak between the MAF and throttle body can result in the complaints you describe and would be pretty likely that you disturbed those during the work on the cooling system.
-Rod
-Rod
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Frdtrkrul
Explorer, Sport Trac, Mountaineer & Aviator
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May 26, 2016 06:50 AM
