I have noticed that i my mpg isnt very good so i think i am running rich is there anything i can do to fix that, i dont have any codes showing, its a 1995 ex civic with a d15b jdm motor... any ideas...

 

new fluids..new filters..

 

everythings new in it, oil,steering,washer,tranny.......

 

new fuel filter and fuel pressure regulator

 

Flush oil, oil change (Castrol GTX is what i use), mix this thing call "Restore" in with oil, flush radiator, change antifreeze (prestone 50/50 is what i use) I did all that last week and so far i really notice a hugh/noticable increase in mpg. Im not sure what made my mpg improve but the Restore i use they claim that it restore ur engine and improve ur mpg.

 

Tomorrow i am getting a new FPR and fuel filter and for the hell of it ill change the oil and antifreeze ... ill post what my findings, also when i start it up it has like dark smoke comin out of the back what the hell does that mean...

 

smaller injectors?

 

get some intake manifold cleaner.....its a spray can u let engine idle and spray into manifold and it burns up all the particles......then run injector cleaner with a tank of super unleaded gas......should be good.

 

New O2 sensor?

 

fairly new, i had it running today and its still smokes abit..