|
Re: 98 Grand Prix - Hard Starting and Higher Than Normal Fuel Consumption
Best thing to do is monitor the 02 sensor in real time with a scanner capable of doing that. Alternative with a DMM at the purple wire which is output see if the voltage varies from .1 volt to 1.0 volts.
Usual suspects for unexplained loss of gas mileage is the front 02 sensor, CAT convertor and even the thermostat just to name a few. Other factors are weather and type fuel being used. TCC lock/unlock in 4th - OD.
|