Originally Posted by craby

u will need a vacuum tester with the pump. im waitin for the camera battery to charge so i can t post a pic. i applied a vacuum to the tb side of the purge solenoid valve. thats the electric valve that the (smaller) medium sized hose from the tb goes to, its mounted on the passenger side of the intake on mine. the other hose from the valve goes to the vent pipe from the fuel tank. the pressure control valve is in the back of the driver side wheelwell behind the plastic cover in the cubby that goes to the tank. there are three connections on it, two in line and one on top, it should not flow air unless there is a vacuum applied to the little hose on top. mine flowed air no matter what on both these valves, the control and the purge valves so it was a easy diagnosis.

Originally Posted by torque_is_good

and one more thing. Getting 15mpg around town with an A4 is not out of the question. How long you warm up the car, sit at lights, are in stop and go all contribute to "poor mileage"

The high numbers you hear for mpg tend to be from the M6 cars.

95 Z28 A4 with CAI, lt headers, magnaflow, custom tune, 3.23's and about 15-17 mpg around town. FWIW, the newer S197 mustangs with the 4.6 aren't much better around town.

Originally Posted by AmirGTR

Did you put the 3.23 on it or is that what's on our cars stock? Cause if I remember correctly the stock number was lower, which means you're getting a lot more than I would if I had the same gears.

I know 15mpg is normal for around town but I never actually gotten 15mpg. I usually get 13.5 - 14.5 mpg depending on how much I want to risk getting stranded in the middle of no where. Only time I got more was around 18 maybe, and that was a 430 mile interstate drive with cruise control on the whole time and a lot of down hills.

Did the custom tune help at all?