why am i running lean still. my AEM FPR is at 40psi, i have stock b20 with mild head work done. when i rasie it up im was backfiring at high rpm... any tips??

 

upping fuel in the program?
what cams?

 

how do you know are you running lean?

 

the inpection station told i was !

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BLUE EH3 &raquo;</TD></TR><TR><TD CLASS="quote">the inpection station told i was !</TD></TR></TABLE>

One option would be to find a crv manual ecu if you are obd2 that is.
A better one would be to chip your ecu and tune it with uberdata. I wouldn't think that it's that much of a difference between the LS and the b20 ecu with the 0.2 litre and considering the stock ls has a higher comp. ratio than the b20b.

 

I have a b20z in my integra. I never had a problem with it at high rpm.

 

what ecu are you using?

 

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

Kenji ecu for my B20 12.5:1

 

p75

 

turn up more the FPR psi

 

whats the diffecne on getting

FPR, bigger injectors, biger fuel pump?

 

FPR allows you to raise the pressure at which fuel can reach in the system before being purged out.

Bigger injectors - common sense really.

Pump - supplying the fuel from your tank.

 

isnt stock pressure on most honda's 45 psi? i know it is for sure on my ef hatch.. but i dont know for sure on anything else.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Redsun &raquo;</TD></TR><TR><TD CLASS="quote">FPR allows you to raise the pressure at which fuel can reach in the system before being purged out.

Bigger injectors - common sense really.

Pump - supplying the fuel from your tank.</TD></TR></TABLE> so what should i get next?

 

Whats a p75?
Turn up the fpr first (i thought 45psi was stock?) and tune with that until you dont back fire.

 

p75 ls ecu