Poor Fuel Economy

Fuel economy is noticeably lower than expected. Customer should drive vehicle and note miles per gallon decrease.

POSSIBLE CAUSE ACTION



Incorrect spark advance - Check Spark Controls,


Restricted exhaust - Check Catalytic Converter, Catalytic Converter


Incorrect Air-Fuel mixture - Check Air-Fuel ratio, perform injector balance test, inspect regulator operation (check vacuum line and return hose), check fuel pressure


Air filter restricted - Clean or replace


Poor or contaminated fuel - Recommend higher grade fuel