Two things make an internal combustion engine function: fuel and fire. If the engine in a Highlander isn’t working the way it should, then it’s because there’s a restriction on one or the other. If it’s fuel, then the two most common problems are a clogged fuel filter and a malfunctioning fuel pump. Check the filter for clogs, and then check the pump and fuel lines.
Tools Used: Tools, Floor jack, Jack stands, Replacement parts, Clean bucket, Adjustable wrench
Check the Fuel Lines and Fuel Pump
Raise the rear end of the Highlander with a floor jack and support it by the frame with jack stands. Locate the fuel lines running from the fuel tank in the center of the rear of the SUV along the bottom of the frame to the engine compartment.