I have searched the boards and keep getting mixed reviews... I put a K&N air filter on my 99 four runner and notice a decrease in MPG.... A little better on power but need a definitive answer to this... Does the K&N air filter cause my truck to run rich and lower my MPG or is this temporary?
PS- I did reset my EFI
THANKS!!!!!
You are probally harder on the gas, because of the new feel of power.
If you live in the Northern Hemisphere, turning on the A/C when it's a heat wave outside reduces MPGs. If anything it should run more leaner due to the increased airflow, until the ECU compensates.
Sorry for the silly question but...
What is the procedure to reset the EFI ?
-TheKidd
Don't let a change in mileage after you do this fool you into thinking the different filter is the reason. I have seen the fuel economy change after a computer reset even without changing anything else. Keep track of your mileage over a longer term before you draw any conclusions.
Ed
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