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What could cause a sudden 30% drop in fuel economy? Detroit 60 series diesel engine?
I`ve done a P.M., oil change, changed all fuel and air filters, tried fuel additives (lucas, and two others) and my MPG is still reduced. My average MPG is 6, but I am getting 4mpg in one of my trucks these last few weeks.
Any ideas or suggestions?
2006 Freightliner Columbia
420,000 miles. Detroit 60 Series Diesel, 10 speed
@Jim M- check them for what? and how?
@Dalton- I am getting no check engine light and no engine codes, Power did drop off a little when th fuel filter became clogged, but full power was immediately regained when fuel filter was replaced. MPG is still suffering however.
2 Answers
- jim mLv 71 decade agoFavorite Answer
check injectors, to see if they work properly, if one is sticking that will do it , if more then one is sticking fuel consummation is out the window , as for how , now you need a mechanic sorry
- 1 decade ago
I could go with oxygen sensor but does the check engine light come on? If so have it checked.
