scoobdizzle

ok i changed my fuel pump to a walbro and put in a fpr in to. first thing is i got MY96 type ra. when i replaced the oem to walbro the oem was way bigger then the walbro? did i need to change my fuel pump...? and second thing is since i put these to in wen i get to 4000rpm it will jus cut out and start to backfire ? could some one advise me or help to see what the problem is ?

Nate

iTrader: (2)

Maybe the FPR is not set up correctly ? Changing the fuel pump should not be a problem, all I can see it being is the FPR.

scoobdizzle

nate what about the size ? does that really matter ? you say set up ? i put it back to factory fuel supply thats what it does it i put it up slighty when the car idles it feels like its going to drop and cut off ?

frayz

iTrader: (7)

Sounds like fuel starvation.

What pressure is the FPR set to?

What was the pump you removed? Was it deffo a stock one in there to begin with?

scoobdizzle

frays not to sure at the mo on what its set ( ill go to the car and check inabit) but when it was fitted it was a bit high. then the guy who fit it said he put it back to factory settings(which is still no good.
now for the fuel pump the only thing that it says on the pump is :

A42-646055
UNISIA JECS MADE IN JAPAN

thats how it is exactly on the pump. sorry is still just the pump size which is worriing me the filter is big on the pump to.

scoobdizzle

help

frayz

iTrader: (7)

Well unless you have a serious spec, a Walboro should cope with most stuff up to 450/500bhp.
So i guess im saying that either pump will supply enough for the car, as you said i was running okay on the old pump.
You either have a clogged filter thats starving the car underload or (and more likely) your FPR isnt setup correctly.