I have a 99 Ford Ranger automatic with the 4.0. The tank is 16.5 gallon tank and im getting between 160 and 180 miles. My engine light comes on and i check it with my friends snap-on computer. It says its too lean. But the intake gasket isnt leaking. Theres no egr valve on it just need some help. Thank you.

__________________
1999 Ranger xlt 4x4
Chrome Pacer wheels with 30x 9.5 Nokian Vativa MTs