I have a 92 Civic, and there is an 85% chance my fuel pump is bad because when I drive, power cuts of for about 3 seconds every 20 seconds,(feels like I let off the gas for 3 seconds when I didn't) and I already changed fuel filter, plugs, wires, cap, and rotor. What I'm going to do is get a Walbro after I do my B20 swap. The question is which one should I get the Walbro 190lph Fuel Pump, or the Walbro 255lph Fuel Pump. I will be going NA all the way with moderate mods. Also will these pumps make me burn more gas.

 

I think it may be something else, like the tps. A bad fuel pump will typically cause your engine to break up under high load or high rpms.

 

190lph is more than enough, should not use more fuel as long as you maintain the same rail pressure.

 

so the 190 is good for a 2.0 setup ?? i have kinda the same question

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jerseykid609 &raquo;</TD></TR><TR><TD CLASS="quote">why not get a 255 there less then 100 bux be more fuel then you'll ever need better to have more then not enough.. </TD></TR></TABLE>

They are the same price. it won't hurt to go the biggest and will be good if u ever want to go turbo.

 

Expect to run way rich at idle with a walbro 255. The orifice in the fpr return is too small for the added fuel resulting in higher pressures. Basically your fpr will become a restriction.

I had my b&m set to 46 psi (hose off). Static pressure was 38 psi. Installed the walbro 255 and my new pressures were 56 psi (hose off) and 46 psi static. Adjusted it to 48 psi and static was 44 psi. To lower the pressure I tried this http://www.theoldone.com/articles/regulator/.
Pressure at idle is now 42 psi. Still rich.

Just my $.02.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jerseykid609 &raquo;</TD></TR><TR><TD CLASS="quote">thats cus a b&m is a shitty FPR... they never hold steady pressure.. </TD></TR></TABLE> Maybe... i haven't had any problems.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jerseykid609 &raquo;</TD></TR><TR><TD CLASS="quote">the pump doesnt change how rich u run your crazy </TD></TR></TABLE>

If you add a more powerful fuel pump and the fuel pressure return orifice size remains the same it's inevitable that you'll run rich. A walbro 255 with a stock or b&m fpr will definately make you run richer. End of story.

 

yea

 

I got the 255 with 345cc injectors and the B&M Command Flo. I got pressure down to 30 PSI @ idle and 46 PSI w/o vac. I got an STR fuel rail, though. No problems.

 

so in answer to yr question 190lph is plenty, 5.0L mustangs used a 110lph for comparison. your fuel requirements NA will never need more than 190lph

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eda6 &raquo;</TD></TR><TR><TD CLASS="quote">Expect to run way rich at idle with a walbro 255. The orifice in the fpr return is too small for the added fuel resulting in higher pressures. Basically your fpr will become a restriction.

I had my b&m set to 46 psi (hose off). Static pressure was 38 psi. Installed the walbro 255 and my new pressures were 56 psi (hose off) and 46 psi static. Adjusted it to 48 psi and static was 44 psi. To lower the pressure I tried this http://www.theoldone.com/articles/regulator/.
Pressure at idle is now 42 psi. Still rich.

Just my $.02.

</TD></TR></TABLE>

i agree with this. mine jumped up extremely high with the 255. a 190 for your setup is more than enough.