Engine Performance problem
2002 Pontiac Bonneville 6 cyl Front Wheel Drive Automatic 135, 00 miles
The cars runs well but the fuel economy has dropped 100 miles per tank. I changed the fuel filter, PCV valve, plugs (very clean old ones). I suspect the heated oxygen sensor. How do I change it? Also, does this model have one or two of them?
Wednesday, April 23rd, 2008 AT 10:29 PM