10 mpg seems like quite a significant symptom. Just off the top of my head, it sounds like a "closed loop" running engine. Could be the o2 sensors, but they don't usually go bad together all at once. Has the mileage been getting worse and worse or is this the first time you've checked it in a while?
I've heard of the timing just going bad, but that wasnt the case with me. If it's just a matter of adjusting the timing it shouldnt be a huge problem. If it's something with the timing belt or chain (whatever the case is) it'll most likely be a pain in the ass. I'm not sure what the timing is supposed to be set at, but i know that the timing on mine was bad when I got it...it just steadily grew worse. For the inertia fuel switch, Look behind the plasticky carpeted walls of your trunk (thats where it is in my notchback, i dont know about a fastback) and it should be on the left side. It's a little gray box with a button on the top and plug in the bottom
all the fuel switch dose, is if you in a car accident for say, and you stop really fast, it cuts the fuel pump, so that if a fuel line is broken some place from the accident, it dosen't pump gas all over the place and start a fire.
again, the best words of advice, are pull the codes. That will at least give you a starting point.
again, the best words of advice, are pull the codes. That will at least give you a starting point.
Fuel pump is in the tank...it can only dump fuel back into the tank.
We only have one 02 sensor...if you know how to loosen and tighten a single nut or bolt, you can do it.
You need to scan for codes first and foremost, then check the fuel pressure (or pull the vacuum line off the regulator and see if there is any gas in it).
We only have one 02 sensor...if you know how to loosen and tighten a single nut or bolt, you can do it.
You need to scan for codes first and foremost, then check the fuel pressure (or pull the vacuum line off the regulator and see if there is any gas in it).