Im getting bad gas mileage and belive it may be from the amount of fuel pressure thats being run. I have

99 jdm itr swap
i/h/e/high flow
hondata
walbro 255 fuel pump
FPR
and dyno tuning

my car idles at 52, and when i throttle its around 60

what should it be at? Is it ok to just adjust it or will that throw off the tuning? Is this my cause of bad gas mileage?

My car dosnt seem to run rich, it runs like a champ, and the spark plugs look better then plugs on my brothers d16 stock na motor. Everything runs like it should. Just curious about more info on the itr fuel pressure settings....seems im not getting the mpg as i should be...........

 

Dont adjust the fuel pressure. It will throw off your tuning.
If it is tuned right, it wont affect your gas milage.

 

52 at idle is kind of high. I believe when my car was stock, idle pressure was around 38-43 Psig. Now it's set at 40 Psig.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by digital sol &raquo;</TD></TR><TR><TD CLASS="quote">Im getting bad gas mileage and belive it may be from the amount of fuel pressure thats being run. I have

99 jdm itr swap
i/h/e/high flow
hondata
walbro 255 fuel pump
FPR
and dyno tuning

my car idles at 52, and when i throttle its around 60

what should it be at? Is it ok to just adjust it or will that throw off the tuning? Is this my cause of bad gas mileage?

My car dosnt seem to run rich, it runs like a champ, and the spark plugs look better then plugs on my brothers d16 stock na motor. Everything runs like it should. Just curious about more info on the itr fuel pressure settings....seems im not getting the mpg as i should be...........</TD></TR></TABLE>

if its tuned don't mess with fuel pressure, its possible to get better by running open loop in partial throttle and leaning it out a bit, closed loop will go around 14.7, thats what i run and don't get too bad of mpg