300zx fuel pump - need help
So I'm fairly certain that the fuel pump in my NA 300zx is dieing. I get that rather loud buzzing sound when ever my foot is on the throttle, even a little bit. Searching around, that seems to be a common symptom.
Attempted to search around and find the common replacement/upgrade pump that is used and I have found so much conflicting info, I need some help sorting it all out.
Some places say to just use a walboro as it flows more than enough.
Other places say that to use a walboro, you have to do some special wiring to get it to work because the stock fuel pump has a high and low function.
Some places say that the NA pump is just a single speed pump.
Others say it is a dual speed pump.
Some places say the Turbo model is a dual speed pump.
Others say it is a 3 speed pump with a low, medium, and high.
I even stumbled across once hole in the wall type site that was talking about how installing a turbo pump on your NA will increase gas mileage because the "low" is lower on the TT pump than the NA pump and when you stomp on it, you'll have more response/power, because the "high" is much higher on the TT pump than the NA pump.
The information out there is more jacked up than it is when it comes to anything honda related. It is like the entire 300zx world revolves around "I had a cousin who's friend did it like this.."
General consensus is that there is a fuel pump controller/module/doodad.
Does that directly vary the voltage to the pump which causes the "high and low" so that the pump itself is just a "normal" pump, or Is the pump actually something special with multiple speeds?
Could that be what is actually wrong with my car and not the pump itself?
Is there a better pump to use other than the stock NA pump? Car isn't anything too crazy, just daily driver with bolt ons. Looking at possibly a shot of nitrous to play around with, but nothing crazy there either.
The stock pumps are anywhere from $250 and $350 depending on where you find them. Makes the less than $100 walboro look really good, its just too damn noisy, which is a deal breaker for me.
Mucho appreciate-o the help-o
Last edited by Empire; Feb 24, 2011 at 10:24 AM.