Impala While undergoing many facelifts in its history, the Impala has proved itself to both civilians and police forces as one of the most capable 4-door cars GM has ever offered. Currently moving towards its 10th generation the Impala is one of the longest lasting and popular models.

2014 Chevrolet Impala
Includes: Bel-air
Platform: B-body & W-body

bad gas mileage

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Old Dec 23, 2011 | 5:46 PM
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blue05's Avatar
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Default bad gas mileage

i replaced my faulty fuel pressure regulator and now my mileage has dropped in half. could the new regulator be bad ?
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Old Dec 23, 2011 | 6:59 PM
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the only way to know is to check the fuel pressure and see if its too high. How did you diagnose a bad regulator?

If you have access to a scan tool that can view data stream; you could check the fuel trim.
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Old Jan 6, 2012 | 1:38 PM
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HotSauce6226's Avatar
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From: Shelbyville, KY
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Check the fuel filter.. I bet its dirty
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