Check engine soon

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Jul 27, 2009 | 09:24 PM

Bronc1

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Mountain Pass

Joined: Oct 2006

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Check engine soon

03' F-150, 4sp auto, 160k

Today my "check engine soon" light came on, I had it check by a local auto parts store and the reader came up with "burning lean right side, burning lead left side", what does that mean and can I fix this problem myself?

Jul 28, 2009 | 12:40 AM

P2RF150

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Joined: Jul 2009

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From: Oklahoma

maybe your truck is running lean due to the o2 sensors sending a bad reading to the (ecu)(computer)?

just a guess

Jul 28, 2009 | 06:03 AM

torkum

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Joined: Dec 2005

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From: Mount Juliet, TN

Could be a hole in the PCV elbow.

Jul 28, 2009 | 06:35 AM

projectSHO89

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Joined: Jan 2004

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From: St Louis

It isn't the O2 sensors - they are just reporting the condition.

torkum's suggestion covers 80% (or more) of this code combo.

Jul 28, 2009 | 09:59 PM

Bronc1

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Mountain Pass

Joined: Oct 2006

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Can someone post a pic of the pcv elbow or tell me where to look. The truck is now starting to idle fast than slow than rough and it died on me in traffic today. Also could this be bad gas?

Jul 28, 2009 | 10:11 PM

GLoiselle

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From: Lutz

Its the plastic intake ,its 2 pc's with seals between them held together with 8 - 12 bolts.must be getting p0172/p0173 or the like.couple hundred bucks if doit yourselfer.I replaced mine and the iac motor and no problems since. This is not a guess but a proven fix -damn vac leak why its running lean 5.4 and 4.2 worst for it.

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