Losing gas mileage

brock0lee · Mar 31st, 2008, 04:20 PM

I have a '97 200SX that I've had for around three years. When I first got it, I was getting 32 MPG average. About a year ago I started to notice that my fuel efficiency was dropping. I'm now getting around 22-25 MPG. Does anyone know why this is happening and what I can do to rectify it?

Nismo240 · Mar 31st, 2008, 04:28 PM

could be a number of things. dirty air filter, dirty fuel filter, old O2 sensor, dirty injectors, tires not properly inflated. i have no clue as to what it is because i have no idea how well you maintain your vehicle. and btw, try posting in the proper section next time.

brock0lee · Mar 31st, 2008, 06:00 PM

Quote:

Originally Posted by Nismo240

could be a number of things. dirty air filter, dirty fuel filter, old O2 sensor, dirty injectors, tires not properly inflated. i have no clue as to what it is because i have no idea how well you maintain your vehicle. and btw, try posting in the proper section next time.

It's not a dirty air filter 'cuz it's been cleaned, nor the fuel filter 'cuz it's been replaced. It's also not the tires since I rotate them & keep them air'd up. I'll try some fuel injector cleaner and see how that turns out. I posted this in the section for 200SX's, so if it needs to be posted somewhere else, point me in the right direction and I'll do so.

Nismo240 · Mar 31st, 2008, 06:12 PM

this is the section for S12's, which were RWD.
http://www.nissanforums.com/sentra-pulsar-nx-b14-200sx/