Rough Idle in Park and Check engine light on

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May 13, 2008 | 08:10 AM

jwillyf150

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From: South, AR

Rough Idle in Park and Check engine light on

I recently purchased an 06 f150 fx4 5.4L with 60K miles. Just recently my check engine light came on and i've noticed a slight rough idle in park. I took it to autozone and the code read P0422 evap emission leak. Bought a new fuel cap but didn't help any suggestions... EGR valve? Any help would be appreciated thanks.

May 13, 2008 | 07:06 PM

96sherm

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Joined: Aug 2006

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From: Yorkton Sask

sounds like a vaccuum leak... could be egr... someone more knowledgeble will stop by

May 14, 2008 | 12:04 PM

Lazy K

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Not an expert either. All I can suggest is that you check the evaporator line going from the fuel tank along the frame rail to a canister in the engine compartment. Look for cracked or disconnected rubber hoses.