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Jeep Wrangler JK
JK General Discussion
Why Would My MPG Drop?
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<blockquote data-quote="Anybodyhome" data-source="post: 449224" data-attributes="member: 19161"><p>No lift, change in tire/wheel size, gearing...nothing has been done to the drive train of the vehicle? The reason I threw out the idea to begin with is a slight change in mileage would be expected to the positive, but a 4 mpg loss represents around a 20% loss and I would suggest that it is an ECU issue and not necessarily an engine issue. </p><p>Have you run a JScan or another diagnostic to see what's going on? Highly recommend it.</p></blockquote><p></p>
[QUOTE="Anybodyhome, post: 449224, member: 19161"] No lift, change in tire/wheel size, gearing...nothing has been done to the drive train of the vehicle? The reason I threw out the idea to begin with is a slight change in mileage would be expected to the positive, but a 4 mpg loss represents around a 20% loss and I would suggest that it is an ECU issue and not necessarily an engine issue. Have you run a JScan or another diagnostic to see what's going on? Highly recommend it. [/QUOTE]
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Jeep Wrangler JK
JK General Discussion
Why Would My MPG Drop?
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