I get around 13mpg city and 20mpg highway in my 97 prelude with almost no modifications. I know it is not because of my driving habits, because i tried every gas saving tip. What could be the problem with my engine and how do i get more miles?

 

maybe in your city you just have high traffic?

 

take excess junk out of the car to lighten it lol

 

clean your injectors.

 

Maybe change the fuel filter, do a valve-adjustment, change the cap & rotor, and new sparkplugs.

 

if you have stick, keep your rpms low and never into vtec.

 

what octane are you using?

 

air filter? tire press?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Shakes &raquo;</TD></TR><TR><TD CLASS="quote">what octane are you using?</TD></TR></TABLE>


91 octane

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by @ries &raquo;</TD></TR><TR><TD CLASS="quote">Maybe change the fuel filter, do a valve-adjustment, change the cap & rotor, and new sparkplugs.</TD></TR></TABLE>

I've changed all of that, kept my rpm below 5000, and my tire pressure is perfect. Should i change the thermostat and flush the radiator?

How many miles are your preludes gettin?

 

Ive seen this on a few cars of friends and y Pug where te air filter has been very dirty in need of change,when I changed my Pug's I got way better gas miles and it was more responsive

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by OTT &raquo;</TD></TR><TR><TD CLASS="quote">Ive seen this on a few cars of friends and y Pug where te air filter has been very dirty in need of change,when I changed my Pug's I got way better gas miles and it was more responsive</TD></TR></TABLE>

are you talking about the air box?

 

Damn, I get 30 mpg on the highway and 24 or better in city. I have the stock JDM p13 ecu too. Something must be wrong.