Hi people, my car is running low gas mileage now, now is running about 300 full tank. Used to be 330 or higher. And i felt that the car has some power lost when u hit it hard. My car has 77000 miles on it.

any suggestion to make it better?

 

Have you changed the spark plugs? It simple to get to 4 of the spark plugs the other 2 you have to take the top of the intake off.

 

New MAF possibly, and always use premium fuel. You dont need to change your plugs yet.

 

You really dont til 100k but a lot of people on here do, i just changed mine at 88k with new OE Nissan plugs, it helped the response definetly and mileage maybe a little.

 

change the fuel filter.

 

yea id say invest into a new MAF sensor..def helped my gas mileage and power with my 2K. like they said before spark plugs arent reall due till 100K...bottle of fuel injector cleaner wouldnt hurt....

 

Fuel filter, plugs, PCV valve, tranny fluid, engine oil, radiator fluid, flush brake fluid, air filter and check belts, particularly acccessory belts. And of course check brake pads and rotors.

 

Clean Air filter?

 

It's definitely MAF - just got mine (2K1) for $170 and installed it myself in 40 min - got the mileage and power back.

Are you experiencing high RPMs and no power when accelerating? If so, then it's time to replace your MAF and don't take long to do that 'cause it's going to knock your O2s out one by one...

 

Just bought on O2 max, how wouldi know the maf is broken, just had to replce an o2 sensor.