THE FUCATYPR HATCH

Any way I have A 1988 CRX HF with an 1999 b20z jg stage 3 head full built with all motor cams and a jackson charger and I am Getting about 6 miles per gallon on the hyway does any one know what I can do to get better gas milage? It is only throwing one code it is 13 that is the baro sensor I replaced it and still have the code and I reset the computer.
Please no smart *** remarks.
This is pretty serious

beepy

Leaking fuel?


I can't imagine that the B20 would even run with 4x as much fuel as stock going through it.

THE FUCATYPR HATCH

nope..

beepy

The fuel has to be going somewhere. You are either running so rich that you are basically dumping fuel in (in which case the car would run like crap and would billow black smoke), or the fuel is leaking out of your tank or one of the lines.

Have you checked all the lines? Have you checked the condition of the spark plugs? Soaked with fuel, covered in carbon? Is your return line not going back to the tank?

THE FUCATYPR HATCH

running rich very rich but I dont have a clue as how to fix it?

beepy

Okay, tell us everything about the fuel system. What pump, what injectors, what fuel management?

THE FUCATYPR HATCH

1988hf fuel pump ( please dont curse me I know)
safc2
jrsc fmu
b&m press regulator
94 prelude injecters
gude ecu w/out revlimiter

THE FUCATYPR HATCH

Oh yeah no adjustment on the safc either.

THE FUCATYPR HATCH

it runs like a scaulded dog but this gas milage sucks, it sounds like a v-8 supercharged with the lope and the whine, I just put it all together yesterday, so I havent had time to go to the dyno yet, but I have allready filled the tank up 3 times in the past 24 hrs.

0xenocron

Im guessing the maps in the Gude ECU arent for your car...that in combination with FMU you are running super rich.

Why on god's green earth would you build such a beast and use that combination?

What ECU is this running on?

Have you looked into TurboEdit???

http://www.turboedit.org

wantboost

iTrader: (2)

the fmu maybe??? I'm clueless

THE FUCATYPR HATCH

how can you test the fmu?

beepy

Okay, what you are going to need to do is test your fuel pressure. My guess is that the combination of a FMU (of unknown pitch) AND an adjustable pressure regulator is to blame.

If your fuel pressure is spiking to 100 PSI that would explain the rich condition right off. The pressure reglators can easily be maladjusted and cause this.

If that isn't it, you have a SAFC, might as well use it for diagnosis. Yank 50% of MAP signal and see if that doesn't make it run better.

THE FUCATYPR HATCH

the fuel pressure guage is set at 40 but when you give it gas it goes to 45 then back down to 28 from 2000to 5000rpm.

beepy

Okay, then adjust the SAFC as I suggested. If that makes it run better, then the problem is the map loaded onto the Gude ECU. It needs to be tuned.

THE FUCATYPR HATCH

Are you famillar with the safc 2 and can you tell me hoe to do it?

beepy

Sure, it is easy enough.

Assuming that the SAFC is hooked up right, and functioning correctly, you just need to go into "settings" then "Lo THR", which will show a graph. Turn the dial counter-clockwise to make the setting drop to negative corrections. Then fress the right arrow over and do the same to the next section of the graph.

Now, if the SAFC is not functioning correctly.... There may be other problems. If you don't know how to use it I am guessing that you didn't install it, and if you didn't install it who the hell knows what the settings are on.

But going through the "etc" menu,

# of cylinders should be set to 4,
the throttle should be set to [arrow up],
the sensor type should be pressure sensor,
the pressure sensor settings should be 6 in, 6 out,
"th set point" should be 00 low, 95 high

So first make sure the unit is set up right, see if that fixes it. Then try taking fuel out with it, see if that fixes it. Then take your car to a tuner to get it tuned right. The more this thread continues, more possible problems are appearing than fixes. You have a complex system there and you need to know how to tune it, or find someone who does!

THE FUCATYPR HATCH

bump

rextec

i dont think it could even run with that much fuel going through it. that is as much fuel as a carb. big block would use!!!

CRX T-Si

Best and only suggestion is to get that thing tuned.

SOHC_MShue

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by THE FUCATYPR HATCH &raquo;</TD></TR><TR><TD CLASS="quote">1988hf fuel pump ( please dont curse me I know)
safc2
jrsc fmu
b&m press regulator
94 prelude injecters
gude ecu w/out revlimiter</TD></TR></TABLE>
why in the world would you even run a crazy fuel setup like that? Get some larger injectors, ditch that afc, ditch the fmu, get rid of the gude program(not sure why you would be running that on your setup???), and look into turbo edit or something.

Gearspeed-Performance

iTrader: (1)

After this third thread...I hope you have taken someones advice?? Good Luck

https://honda-tech.com/zerothread?id=1127571
https://honda-tech.com/zerothread?id=1127569

b20turboic

Hey man i got the Zydne Gold ECU from my turbo car ... made it run 10000000% awesome if your interested let me know i dont want that much for it ... also got some 450's you could have ... easy to tune and it actually ran better than many of my factory turbo cars ... SMOOTH as hell .. plus i made over 300 whp easy on it with minor tuning on my B20 .. So let me know man im looking to get rid of it plus it will make your car last a lot longer than a SAFC hack and fmu

SOHC_MShue

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b20turboic &raquo;</TD></TR><TR><TD CLASS="quote"> made it run 10000000% awesome </TD></TR></TABLE>
lmao that sounds funny