Bad mileage

Kenneth Bowen · #1 (**permalink**) 12-24-2008, 03:00 AM

I added a pacesetter header, 2 1/4" exhaust, and an Injen cold air intake about 6 months ago. My gas mileage became worse afterward. I was getting between 38 and 42 on the highway. Now I'm lucky to get 36. I'm wondering if I need to change to a 3 wire heated o2 sensor? Has anyone else experienced this?

HondaKillah · #2 (**permalink**) 12-24-2008, 08:30 PM

Adding mods usually adds makes you drive a bit more aggresive,you sure its not your lead foot?Did you reset the ECU after adding those mods,especially that intake.

Kenneth Bowen · #3 (**permalink**) 12-25-2008, 12:27 AM

Reset the ECU? This is all new to me. Previous to owning the 200sx, was modified injected small block chevys. 4 cylinder front wheel drives are new to me.

sergey85 · #4 (**permalink**) 12-25-2008, 01:33 AM

yeah my guess is since u modded it a lil your mpg will probably go down. aint nothing u can do i guess

Rice#80 · #5 (**permalink**) 12-26-2008, 08:36 AM

You make sure you hooked up a breather line, and made sure all the vacuum lines were hooked up? I know my friends mileage went super downhill when we had nothing for one of his vacuum lines