2002 Ford F-150 Q&A

2002 Ford F-150 Question: can evap system leak cause bad gas milage in 2002 f-150

can evap system leak cause bad gas milage in 2002 f-150 -
Answer 1
Yes, it could. i.e. a disconnected vacuum hose or a stuck open vent solenoid will let extra -unmeasured- air into the manifold and since the ECM will adjust to the perfect air/fuel ratio it will keep the injectors open for a longer time, which results to lower gas mileage.. I don't know if this is the problem in your case, but it can happen for sure. Zee -