Before my lsv swap I was getting around 330 miles to the tank on highway. Now Im only getting around 280, and the city is around 200 or less. Any help would be great!!!

 

bad injectors?

 

That's what I was thinking. Hopefully that could help out. I been running the same injectors for a few years now

 

obvious troll is obvious.

bads fuel mileage is mostly caused by o2 sensor.

then by fuel injectors or clogged fuel filter.

could also be exhaust leak before the o2 sensors causing wrong mixture of air/fuel ratio because it keeps an open loop in ecu thus causing poor more gas.


lets start by the basics??

do u have a CEL?
year of car?
things u have tried?
things u have ruled out


the reason we dont answer your question is cause there are numerous things that can be wrong.

its obvious you did not do any testing or research because you would have narrowed down your problem to a few things rather then the entire list of things that could be wrong and expecting us to know exaclty what your problem is and tell you.
researchin is meant to guide you and help you narrow your problem so u can fix it, it DOES NOT mean u can search for ur problem and boom it gives u the exact method to fix it, cause u can do all the research in the world, the research button doesnt know which problem YOU have....., research is meant to find possible solutions... so no u did not research.

i doubt u even know how to use the search option on here.

why dont you start by making sense in your question. listing things you have tried or have not tried. do a little more research and dont be a *** to the people who actually give you input.

you have 60ish posts so you have not even been here long enough to search or do research. and if you did research you would of found out what causes a rich car, instead you made an account and only post here when you want to fix something.

also by the way you just went off and got mad so quick tells us you young and deserves to learn the hard way.


i like the way you say OH OBVIOUSLY gsr burns more gas. yet the drop in your gas isnt all that much, i doubt you even have a problem at all, and bad injectors would cause more drop in mileage than you have. also injectors last for more then 'few years'....

 

I did put a new fuel filter in. The injectors were used from a friend of mine out of his del sol. I have a small exhaust leak from the header where it goes 4-2. I read that a bad o2 sensor could make bad fuel mixture. I did my research, sorry for the attitude with the other guy. I just hate smart *** posts from anyone. There's always new post on here that have been posted or talked about before. No Biggie, just trying to figure it out, thanks anyways!!!

 

Fix cracked header, run some injector and/or fuel system cleaner, basic tune-up stuff (new plugs/wires etc which should have been done anyway), maybe replace the O2 sensor if it's not new. And try some different injectors if you can. You need to rule things out one by one.

My 300K mile GS-R easily gets 300 miles to a tank in the city, usually 350-380 on the highway so something is definitely wrong there.