Dear All,

kindly i have a VTI 1997 D16Y8 Sedan, i have changed new NGK Spark plugs and new fuel filter and new air filter... and still having problems with fuel economy..

can any one help me figure out the problem?!

 

What exactly is the problem? You still have yet to describe it.

 

Maybe do a complete tune up.
What kinda MPG are you getting? You need to describe your problem more so we can help.