MPG getting worse on Motorhome
Hi-I have a 1997 22'Shasta Ford E-350 chassis with V-10 triton engine. Class C with over 100,000 miles. The rig was pretty consistently getting 10MPG. About a year or more ago the MPG dropped to ab...
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You didn't say that you replaced the spark plug wires. They and the coil can be a source of lower MPG.
