havalilsi

me and a bud just did a h22 into a 2000 si. the motor is from a 97 sh. the car has a p23 computer with a jdmshit chip. the injectors are from a 92 accord. the car drinks gas like mad. sometimes it smells like fuel and when i lift off the gas pedal the car backfires. has anyone else experienced these problems and how did you solve it. this gas bill is getting out of control.
what kind of fuel mileage do you guys with the h22 swap get

havalilsi

didn't anyone have fuel problems?

v4lu3s

well you got issue then with those tiny injectors on that engine.

anyway i get from 23-32 mpg with teh h22a swap in my civic and accord.

havalilsi

what kind of computer are you running in the civic and which injectors.

Adam.

are you running:

1. aftermarket fuel pump
2. fuel pressure regulator
3. vafc

Your jdmshit chip should richen everything up a bit on stock setting if you don't have good flowing boltons. If you don't have an fpr you need to get one, and make sure you can adjust down on teh fuel pressure with it.

btw, I also get around 23-25mpg. But i drive like I got a pair, so you sissy boys may get better.


Modified by DarkKnight[DMD] at 10:13 AM 10/4/2004

v4lu3s

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by havalilsi &raquo;</TD></TR><TR><TD CLASS="quote">what kind of computer are you running in the civic and which injectors.</TD></TR></TABLE>

i run a p28 with various different programs on it. I run the stock injectors as well. I am running a wlabro 255lph high pressure pump as well. The best milage I have had is with a hondata p28 that I sold, it was tuned by a local guy for a friends car and got me 27 mpg in the city and 32 on the highway. Currently I run a p28 program that I made myself and it seems to average around 24-25 mpg in mixed city and highway driving.

havalilsi

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DarkKnight[DMD &raquo;</TD></TR><TR><TD CLASS="quote">]are you running:

1. aftermarket fuel pump

no its just the stock si pump
2. fuel pressure regulator

no
3. vaf

no


Modified by DarkKnight[DMD] at 10:13 AM 10/4/2004</TD></TR></TABLE>
i can't find a good shop around here to get good answers from. where in florida are you from

Adam.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by havalilsi &raquo;</TD></TR><TR><TD CLASS="quote">
i can't find a good shop around here to get good answers from. where in florida are you from
</TD></TR></TABLE>

i'm in south florida.

It sounds like the jdmshit program is rich on your setup.

Do you have i/h/e?

In order to fix it, you will need some kind of fuel tuning capability.
-Fuel Pressure Regulator w/ Gauge
-EMS
-VAFC

are all very common ways to tune your car. Get one and you can at least change your fuel conservatively. But do this at your own risk. You adjust it too far an go lean up top, you will go booom.

havalilsi

the car has a cold air intake a dc sport header and a greddy evo

Adam.

That header is generally thought to be pretty crappy and when you talking about just i/h/e for flow, your header is most important.

fastwanabe

I was able to get 390 miles on one tank of gas.... this is highway though. I average about 200-250 when I run on a stock p28. When I flip my toggle switch on my p28 to run the JDMSHIT h22 race program I'll be lucky to get 170 miles to a tank.

H23vtecEG

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by v4lu3s &raquo;</TD></TR><TR><TD CLASS="quote">well you got issue then with those tiny injectors on that engine.

anyway i get from 23-32 mpg with teh h22a swap in my civic and accord.</TD></TR></TABLE>


same here. the stock p13 sucked ***. i got it tunned at the drop shop in manchester NH and now im good to go, i get 200-250 miles out of an 8 gallon tank. and i have a very heavy foot

JonGP4

i'm getting about 26-28 in my Del sol h22, with a p13 and a code 12 EGR..

the reason your getting shity milage is because the map on your ECU is for bigger injectors, so its making you tiny injectors run super rich, but your motor is still starving for gas with its backfiring, or you dont have enough back pressure..

bottom line get the right injectors, and it should fix your mileage

Adam.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JonGP4 &raquo;</TD></TR><TR><TD CLASS="quote">i'm getting about 26-28 in my Del sol h22, with a p13 and a code 12 EGR..

the reason your getting shity milage is because the map on your ECU is for bigger injectors, so its making you tiny injectors run super rich, but your motor is still starving for gas with its backfiring, or you dont have enough back pressure..

bottom line get the right injectors, and it should fix your mileage</TD></TR></TABLE>

ha! i completely missed that sentence about him having 92 accord injectors.... lol, man, i'm dumb.

havalilsi

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JonGP4 &raquo;</TD></TR><TR><TD CLASS="quote">i

bottom line get the right injectors, and it should fix your mileage</TD></TR></TABLE>

what injectors would you guys suggest. i have the p28 from a 94 si... i think

teamlegacy

try h22 injectors...see how that does it. what rail are you using?

Adam.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by havalilsi &raquo;</TD></TR><TR><TD CLASS="quote">

what injectors would you guys suggest. i have the p28 from a 94 si... i think</TD></TR></TABLE>

injectors from the same obd as your motor.

havalilsi

thanks for all the help so far. the car has a aem fuel rail. i spoke to a guy from a tuner shop and he suggested not driving the car until i got bigger injectors. he suggested 440s.

slpycd7

I'm running JDM h22 in my accord with stock prelude injectors and running my FPR (Fuel Pressure Regulator) at 50 psi for daily driving. I still get about 21-24 mpg. I suggest getting stock prelude injectors instead of using accord injectors

Adam.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by havalilsi &raquo;</TD></TR><TR><TD CLASS="quote">thanks for all the help so far. the car has a aem fuel rail. i spoke to a guy from a tuner shop and he suggested not driving the car until i got bigger injectors. he suggested 440s.</TD></TR></TABLE>

Why? Unless you have a monster all motor setup or are going turbo there is no reason to use 440s.

Btw, what shop was that so I can stay away from them?

JDogg

its all in how its tuned.. we have rc750's in my buddies h22 (its all we had laying around to go in there) with some cams and boltons and aem ems, average is 30-35mpg.. mixed beating on it and highway

Adam.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDogg &raquo;</TD></TR><TR><TD CLASS="quote">its all in how its tuned.. we have rc750's in my buddies h22 (its all we had laying around to go in there) with some cams and boltons and aem ems, average is 30-35mpg.. mixed beating on it and highway</TD></TR></TABLE>

Well yea, if that's all you have laying around, you can tune for those. However, that isn't what I'm talking about. All he needs is a set of used h22 injectors. I'm sure he could find those anywhere.

Besides, 440cc injectors on a near stock h22 is ridiculous. KISS.

JDogg

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DarkKnight[DMD &raquo;</TD></TR><TR><TD CLASS="quote">]

Well yea, if that's all you have laying around, you can tune for those. However, that isn't what I'm talking about. All he needs is a set of used h22 injectors. I'm sure he could find those anywhere.

Besides, 440cc injectors on a near stock h22 is ridiculous. KISS.</TD></TR></TABLE>

yeah i know... but im sayin.. its all in the tune.

my old accord with stock ecu and stock h22 got around 26-28 on the highway and 20 if i beat the crap out of it

havalilsi

yo darkknight i sent you an email

Adam.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDogg &raquo;</TD></TR><TR><TD CLASS="quote">

yeah i know... but im sayin.. its all in the tune.

my old accord with stock ecu and stock h22 got around 26-28 on the highway and 20 if i beat the crap out of it</TD></TR></TABLE>

It is in the tune, but that's still unnecessary. He doesn't need 440cc injectors unless he's doing serious allmotor or mild turbo. That shop is either
a. Doesn't know what he wants so just made an assumption
b. Doesn't know wtf they are talking about.

Either way, i'm done with this thread.