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Old 03-02-2010, 11:33 AM   #1 (permalink)
Master EcoModder
Join Date: Nov 2009
Location: Leadville, CO
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Maroon Ballon - '98 Chrysler Town & Country LXI
90 day: 26.42 mpg (US)

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Question Is DFCO bad for fuel pumps??

I recently had to replace my fuel pump in my van lying on my back in the middle of a snowstorm in a hotel parking lot in Frisco. Granted, the vehicle has 194,000 miles on it, and I don't know if this part had ever been replaced, but I do an awful lot of engine-on-DFCO coasting here in the mountains.

I've had this van since 10/09 and the previous owner had told me that he averaged about 17 MPG. Since October I've been averaging about 26.5 MPG, so that's about a 55% improvement.

I'm wondering if the fuel pump was just at the end anyway, or if I led to it's premature demise by engaging DFCO whenever possible, and letting that pump pressurize a fuel system that wasn't getting it's normal release through the injectors?

Any expert opinions on DFCO??

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