Sudden mpg drop?
#1
Sudden mpg drop?
Hi all. I drive 1996 850R. Ive had mpg around 22 for couple years. Now it dropped to 18.8. I have new airfilter. New vacuum liness to turbo. New plugs wires cap and rotor. My fuel trim is perfect zero. One CEL code for downstream 02 only. Any ideas. Only thing i think of is **** tires. Thanks
#2
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#8
Often mileage is a perception unless is it checked regularly. If you have the data, graph it and see what it tells you.
Unless the vehicle is running seriously rich, you are not going to see a 20% drop in mileage. The vehicle's computer has enough default memory to not just dump fuel down the tailpipe regardless of the fuel trim. The only way to dump that much fuel is a stuck open injector.
If there are no codes and no irregular data points, then there is no problem.
Unless the vehicle is running seriously rich, you are not going to see a 20% drop in mileage. The vehicle's computer has enough default memory to not just dump fuel down the tailpipe regardless of the fuel trim. The only way to dump that much fuel is a stuck open injector.
If there are no codes and no irregular data points, then there is no problem.
#9
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