I just put on a walbro high flow fuel pump on my D16 crx with a supercharger. I went from getting about 32mpg to 12mpg I have new plugs and mpg is still down, im thinking the fuel pump changed the pressure, or it caused the fuel injectors to foul out, i have new high output injectors and a adjustable fuel presssure regulator that I have not put on yet think this will fix it?

 

something is real bad wrong
12 mpg is what I get driving around @3.5k in my camaro lol.

any cels? also what are you doing as far as managment?

 

I have a Walbro 255LPH and I was getting some bad MPG numbers, I put a adjustable fuel regulator on it as I was making WAY too much pressure. Im not sure if that is your problem though.

 

Yeah that is what I get in my 7.3L Powerstroke F250. Have you had your car professionally tuned?

 

whats your fuel psi @??..i hope you have a gauge on there.

 

I put mine down to about 25-35 or something like that, but I have a D15b2.

 

yeah, i just picked up a gauge today, i'll have to get that on there asap, i sold my f150 lightning svt because i hated the gas mileage, this is worse than that ever was. haha

 

check your map sensor.

i was gettin 13mph and i had a bad map (but no CEL for it). i replaced the map and then my mpg went back up to 30

 

how much a map sensor gonna cost for a D15B? and an 02 sensor too? do i use a Civic map sensor or do i buy a stock 89 CRX one?