Ford V10 gradual reduction in fuel economy
I have a 26' Class C on a 2000 Ford E450 chassis with V10 engine now with 115,000 mile on it. I used to average 8.5 mpg pulling a 3400 lb toad but over time the economy has deteriated to the 7.5 to 8....
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"My Ford dealer says that as long as I am not getting any check engine codes that my oxygen sensors are still OK and not causing the reduced mpg problem."
Yep, that's what they will tell ya! If there aren't any fault codes, many of the "technicians" of today are literally . . . . . lost.
At 115,000 miles, is your engine using any oil? Say, . . . . more than a quart every 750 miles. If you can't find anything else, it might be worth checking to see if your catalytic converter is getting plugged up. When cold, hit it with your hand and listen for rattles. (broken honeycomb substrate) If no, then removing it and shining a flashlight through it will tell you right away if there is a flow problem. While you are down there, check the entire exhaust system for dents, crimps, etc.
Chum lee
Yep, that's what they will tell ya! If there aren't any fault codes, many of the "technicians" of today are literally . . . . . lost.
At 115,000 miles, is your engine using any oil? Say, . . . . more than a quart every 750 miles. If you can't find anything else, it might be worth checking to see if your catalytic converter is getting plugged up. When cold, hit it with your hand and listen for rattles. (broken honeycomb substrate) If no, then removing it and shining a flashlight through it will tell you right away if there is a flow problem. While you are down there, check the entire exhaust system for dents, crimps, etc.
Chum lee
