I have a Toyota Highlander 2003 V6 with 120000mi;

I have a dropped on fuel consumption from 19.5 avg MPG to 14MPG. I did a complete tuned up besides the regular oil change. There is no codes coming from the scanner or check engine light on. Also, there is no smoke coming from the exhaust that may point to an engine problem.

What could be the problems?

Thanks

Sent from my iPhone

Comments
No. 1-1
ScottyKilmer
ScottyKilmer

Editor

MAF sensor generally needs cleaning or replacement