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Old 01-14-2013, 10:25 AM   #1 (permalink)
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Default 2007 lean bank 1, check gas cap, melting upper intake manifold

Recently purchased and was running fine until I lost power and gas mileage. After closer inspection egr valve was melting upper intake manifold. Replaced egr valve dpr sensor and egr valve control module, and upper intake manifold. Still getting some extra vacume through the egr control. I have been reading everywhere to try and figure out why only the bank one would be running lean with the lower gas mileage and rough low idle on start up. It idles fine after a few mins of running. I know terrible mess I'm about ready to wrap it around a tree and call it good haha. Any takers on what I should do next?
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Old 01-14-2013, 10:35 AM   #2 (permalink)
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Wow, a 2007. Not too many of those around (rental-only year).

Try unplugging the EGR solenoid (electrical connector) and seeing if you still have vacuum at the EGR valve or not. If you have more than about 0.5-1" of vacuum, then the EGR solenoid (EVR) is leaking too much.

I'm surprised you didn't get a P0402 code (EGR excessive flow) if the valve was opening partially. You replaced the DPFE, right?

If you have any other codes besides P0171, please list them. Also provide your fuel trims at idle and while driving if possible.
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Old 01-14-2013, 04:41 PM   #3 (permalink)
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What do you mean by "extra vacuum through the EGR control"?
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