i put in the new motor and installed the turbo as it was. when i boost to about 5psi it's like the car is starving for fuel. this is right about the time vtec kicks in.
i watch my A/F meter and it drops like a rock to full on lean.
i'm running an FMU setup right now. the top fuel line is connected to the fuel rail, bottom to fuel line on firewall. i'm PRETTY sure that's how it was. the vacuum on the FMU is tapped into nearest vacuum line..

any ideas why i'm not getting fuel? i'm running the same setup i had on my b16 motor, but this problem came up.

 

bump before i go out and tear everything off to start over!

 

i thought the top vavuum input has to be hooked up to the vaccum line of the fuel pressure regulator........

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sloorex &raquo;</TD></TR><TR><TD CLASS="quote">i thought the top vavuum input has to be hooked up to the vaccum line of the fuel pressure regulator........</TD></TR></TABLE>

that's what a lack of sleep gets you. you are totally right. i can't believe i did that. i'm gonna go take a nap now ....
thanks for pointing out my oversight!!!

 

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

that's what a lack of sleep gets you. you are totally right. i can't believe i did that. i'm gonna go take a nap now ....
thanks for pointing out my oversight!!!</TD></TR></TABLE>

sleep deprivation will do that to you man........

 

still leans out at high rpm.. but isn't cutting out anymore... hmmmmmmmmmmm

 

you check the fuel lines as well?

 

yup. no leaks anywhere. there is one spot where the metal line was broken and i had to flare the ends and add fuel injection line with hose clamps... no leaks THERE even!
maybe with the new motor and the rest of the setup i've lost some pressure. i'm thinking adjusting the fpr?? i dunno. hondata goes in Nov14.. i just want this to work like it used to 'till then.

 

is the fmu bad......... i hear of diaphrams need replacing, i dunno if havin the lines hooked up improperly will damage it........ if its not hesitant i would try adjusting the fpr........ up the pressure, its better to be rich

 

or i should say its safer to be rich

 

check your plugs if your lean then if it is dont boost.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by InTeGrA B18b1 &raquo;</TD></TR><TR><TD CLASS="quote">check your plugs if your lean then if it is dont boost.</TD></TR></TABLE>

brand new plugs. gapped to about .29

 

Did you put back the in-line fuel pump?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by porsche997 &raquo;</TD></TR><TR><TD CLASS="quote">Did you put back the in-line fuel pump?</TD></TR></TABLE>

i have a 255 Walbro that worked fine before.

my setup is the same as on the b16:
https://honda-tech.com/zerothread?id=624647

only difference now is the b18 and a small, 3" length of metal line coming off the fuel filter that needed repair (replaced with fuel injection hose 'till i buy new metal line). all other parts have been switched over.
oh, and i'm still using my p28 computer, so the secondaries on the intake are not opening.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sloorex &raquo;</TD></TR><TR><TD CLASS="quote">is the fmu bad......... i hear of diaphrams need replacing, i dunno if havin the lines hooked up improperly will damage it........ if its not hesitant i would try adjusting the fpr........ up the pressure, its better to be rich</TD></TR></TABLE>

fmu worked perfectly before the swap

 

no more ideas, guys?

 

one last bump

 

here's the latest. and complete setup:

Car:
* 1992 Honda Civic VX

Engine:
* JDM b18c

Block work:
* Stock

Head Work:
* Stock

Turbo kit:
* Full-Race Turbo Manifold. ( Jet-Hot Coated )
* Precision SC63 ( Largest t3/t4 in precision's arsenal, good for 700whp )
* Full-Race 3" downpipe
* Tial 46mm ( 9lb spring )
* PWR 30x8x3 intercooler
* 2.5" intercooler piping
* TurboXS RFL Bov


Fuel System:
* Aeromotive Fuel Pressure Regulator
* Walbro 255lph in-tank pump (high pressure)
* stock injectors
* STR Fuel Rail
* Vortech FMU

Exhaust:
* 3" Flex-pipe / Test-pipe
* 3" exhaust with straight-through magnaflow muffler

we've changed out the fuel pump, injectors, fuel pressure regulator and STILL i am running lean at WOT. i can rev to 8k and go full boost, but if i go WOT it instantly goes totally lean and cuts out.
okay. not enough fuel.
reilly, ryanautry, and i are stumped. the ONLY thing different than the last setup is the motor (switched from JDM B16a to the B18c), the full 3" mandrel bent exhaust, and a 2" length of fuel metal fuel line (that goes into fuel filter) that was broken. i flared the ends and temporarily added a 3" piece of EFI rubber line with clamps. no leaks.
could that be the problem? maybe something got into the fuel filter?
i'm putting on an aftermarket, inline fuel filter/ss lines/an fittings tomorrow to see if that helps.
we're taking the car to Church on friday the 14th. i'd hate to have to cancel. would this be a problem that the hondata would fix? maybe after going to the larger injectors??
we've been over this a million times and i can't help but to think that i'm missing something obvious...
we're just out of ideas and any you guys have would be appreciated.

thanks

 

I would try adding an inline pump... I know you have a walbro hi pressure pump... but I've typically seen them max just short of 100psi. It may have been enough fuel for the other motor at x amount of boost, but now its just not enough. It's not a matter of how much flow, but pressure since you are using an fmu.

Also is the fmu adjustable?

-Jeff-

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jeff33S &raquo;</TD></TR><TR><TD CLASS="quote">I would try adding an inline pump... I know you have a walbro hi pressure pump... but I've typically seen them max just short of 100psi. It may have been enough fuel for the other motor at x amount of boost, but now its just not enough. It's not a matter of how much flow, but pressure since you are using an fmu.

Also is the fmu adjustable?

-Jeff- </TD></TR></TABLE>

FMU is not adjustable. well, i was one step ahead of you. we added the inline pump and, voila. it worked. i can't imagine there was that much difference in motors, especially considering my Walbro is a high PRESSURE rather than high VOLUME. still boosting the same, but with more compression and more displacement, i guess it was just not enough to push fuel through the stock injectors. i have 550s going in on friday, i'm sure the 255 Walbro will be sufficient. NOW i'll be needing the high volume, though . oh well.
thanks for the suggestion, though. you were 100% correct. of course it was the LAST thing i tried. figures. car sure pulls HARD though.

 

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

FMU is not adjustable. well, i was one step ahead of you. we added the inline pump and, voila. it worked. i can't imagine there was that much difference in motors, especially considering my Walbro is a high PRESSURE rather than high VOLUME. still boosting the same, but with more compression and more displacement, i guess it was just not enough to push fuel through the stock injectors. i have 550s going in on friday, i'm sure the 255 Walbro will be sufficient. NOW i'll be needing the high volume, though . oh well.
thanks for the suggestion, though. you were 100% correct. of course it was the LAST thing i tried. figures. car sure pulls HARD though.</TD></TR></TABLE>

Glad to just hear that you got it taken care of .... Sometimes people dont come back and post what the fix was so when others are searching diging through threads they read about the problem, but never find a solution.

and yeah the walbro 255lph hi flow should be plenty enough for your app with the 550's and hondata...

edit: if you switch to the 255lph hi flow Lightning Motorsports offers a killer price to h-t members...

-Jeff-

 

yep i can see u getting away w/ that on a b16 but w/ an sc63 on a gsr motor, and a p28 ecu i definitly see there being a problem.. hondata sooner the better!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DIRep972 &raquo;</TD></TR><TR><TD CLASS="quote">yep i can see u getting away w/ that on a b16 but w/ an sc63 on a gsr motor, and a p28 ecu i definitly see there being a problem.. hondata sooner the better! </TD></TR></TABLE>

WHERE IN HELL WERE YOU WHEN I STARTED ALL THIS?? hahaha. yeah. it took me a week and a half to figure all this out. just silly! my buddy and i are running down to Church on friday (nov 14) so my hondata will finally be installed.


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jeff33S &raquo;</TD></TR><TR><TD CLASS="quote">edit: if you switch to the 255lph hi flow Lightning Motorsports offers a killer price to h-t members...</TD></TR></TABLE>
i dig Lightning Motorsports. i've dealt with them in the past and have been very pleased. is "high-flow" the same as "high-volume", as opposed to high pressure? if so i'm VERY interested in buying..

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jeff33S &raquo;</TD></TR><TR><TD CLASS="quote">
Glad to just hear that you got it taken care of .... Sometimes people dont come back and post what the fix was so when others are searching diging through threads they read about the problem, but never find a solution....
-Jeff-</TD></TR></TABLE>

yeah, i hate that. so then we get 100s of threads asking the same question 'cause nobody every really said, "my problem was.........."

 

lol. sorry i musta missed it.

 

i feel bad for your motor. you have an extremely nice setup all around and the shittest fuel setup possible. i expect the fmu is fully functional but your motor simply cant get enough fuel nor can the fuel pump cant keep up.