bbbjjj2010
Member
I have an 03 expedition with the 5.4 187xxx miles. Just got my oil changed and found that the oil smelled like gas. Shop wants to flush the intake. I've had problems with the upstream o2 sensor on the passenger side. I've replaced it twice and each time the check engine light would go off. Couple months ago it came back on but I had got laid off from my job so haven't had the extra money to fix that yet. Here lately I've been noticing that I seem to be getting even worse gas mileage (average about 12.8mpg now). I was about to go let the shop flush the Intake and then I was going to go get a new o2 sensor to put on. Before I left though I had a friend over before I left and he knows more about repair than me And he told me he don't think it's related to the o2 sensor like the shop is saying and that it sounds more like a crack in the intake. I'm still not working so before I go start spending money I really don't have I wanted to hear from someone who knows more about this particular vehicle. I still plan on fixing the o2 sensor just don't want to flush the I take if it needs replaced instead. Thanks