Gas Milage Change
#1
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Location: Belleville Ontario
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Gas Milage Change
I Know my truck is a 1999 and has 196,000 miles but I've been getting 24/26 MPG for a long time but in the last couple of months its gone to 19/20 MPG and wanted to check on line before going to a dealer. Does anyone have an idea why the change in MPG??
Thanks
Thanks
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I'm new to the cummins 24v but I have seen some strange mpg numbers from the overhead display, the display mpg average is very accurate over a tankful of fuel, but I have noticed that the instant mpg numbers start at 12mpg (loaded truck) starting a highway trip then over 15 miles slowly increases to 15mpg, I don't know if its just my truck or what but there seems to be a change in performance and mpg as the temps increase. The only thing I can think of is the fuel timing advance changes with Intake air temp. and it takes way to long to get IAT's up especially running empty.
#5
Fuel
I would be woundering if the injecters are slobbering and not delivering the fuel to the cylinders in a fine mist like they should.Get some good injector cleaner put a bunch of it in your fuel an run a tank of it throu there.At kenworth a guy told me the unhook the fuel line and run straight cleaner in there to clean them.
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Thanks for the replies, could be winter fuel and may be injectors, I'm heading out for a trip so before I see a dealer I'm going to check it out during the trip.
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