5.7 tbi poor fuel mileage
June 23rd, 2014, 10:44 AM
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5.7 tbi poor fuel mileage
I have a 91 4x4 dually with 172k. I'm getting about 9-10 empty and about 5 when pulling a trailer. It runs great when empty but when hooked to a trailer, it seems sluggish when in higher rpms. Plugs look good and it's obviously getting plenty of fuel. Any advice as to getting more mileage out of this? Thanks
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