fuel issue & cas question???PLEASE HELP

[ezspoolin]

i have a 95 tsi auto my mods are, 16g ported, 1g bov, hard ic pipes, 1g intercooler, ported exhaust housing and manifold



heres the problem i have been gettin WAY bad gas milage and i had a cel it said it was p0170

fuel trim malfunction in bank #1 on my 95 tsi, what could be the cause of this?

and

what if the cas sensor isn't bolted below the intake cam on my 95 tsi? its just kinda chillin there not bolted to the head


would it mess anything up?

please answer i need this solved so i can sell the car

 

[JCMDSM]

For the fuel problem check the O2 and be sure that it is still good. The cas absolutly needs to be bolted on. I suspect all that is holding it in place is the pressure from the valve cover pressing down on it. Go to the hardware store right now and bolt that sucker on. Good luck--Jon