okay, quick question here. Does anyone have some instructions as to how to install an inline fuel pump on a 94 prelude VTEC? It's a bosch unit and I'm thinking of installing it after the fuel rail. Any help would be great!

 

cut the fuel line between the filter and fuel rail and put in line. Use a relay to hook it up that way you wont burn it up.

 

so that rubber or soft line inbetween the fuel filte and fuel rail is what ur referring to? Is there another way to take it off, because I see a brass sort of crimp fitting or something on each end.

 

those fittings are the way to take it off. That is basicly the only place to put it on stock honda plumbing. Thats the way everyone mounts them when you get a turbo kit. I had mine that way too when I had a street car. A fuel pump is really made to push and not pull, but it gets the job done.

 

So how exactly do u take those fittings off? Do they screw off of the plumbing or are they crimped? As well, how exactly do you wire it into the mix? I understand the concept of the relay, but how exactly would it turn on and off? Finally, how much will it raise my fuel pressure from stock, because I've heard that a lot of people are having problems with running extremely rich at idle and also having problems when they try and start their cars! If you could tell me of any other associated problems that you have heard of would be great. Thanks man

 

putting a fuel pump on will not give you more pressure. It will just make it so the gas is in the rail so when you turn up the presure or upgrade injector size, the gas will be there. On the rail side, its just a nut to unbolt and there are washers in there so dont lose them. Kinda the same thing on the filter side. The fuel like has permanant banjo fittings on both sides. Just take it off, cut it and run the pump inline. Buy a relay from Radio Shack for 5 bucks. There will be a wiring diagram on the back. You just hook the hot from the relay to a signal thats hot from the car only when the ignitions on.

 

thanks man! I should be installing this sucker in some time next week! I keep asking about the idle fuel pressure because I've heard so many things about people running rich at idle and stuff like that. Anyway, thanks again man!

 

One more thing about the wiring, when wiring up the relay, is it possible just to find a source that powers up with the ignition? So instead of using a relay, I can just run the power source directly from the ignition wire? Thanks again

 

it will work, but dont come crying to me when you short out your ignition and your car wont run and you have no idea why. Ive been doing this stuff for a long time and just giving you a heads up that im sure a lot of people wish they had when wiring stuff like this. Its up to you.


[Modified by ninesecrx, 11:37 PM 4/27/2002]

 

https://honda-tech.com/zerothread?id=168875

 

No man, sorry if I came off as sounding like it wasn't a good idea or anything. I appreciate the help and wasn't aware of the benefits of using a relay. getting a source from the ignition was my initial thought and now that I see why it isn't a good Idea. the only thing that I forgot to mention about hooking it up to the ignition was that I would use an inline fuse, but looking at the relay schematic, it makes more sense to do it this way. Thanks again ninesecrx, I do appreciate the help. Oh yah, one more thing, I got a bit confused with the plumbing the fuel pump in. Do I remove the banjo bolts or do I cut the soft line in between the brass fittings? Thanks again man.

 

just cut the actual hose... you dont have to remove the banjo fittings...although it might make it easier. Oh and I didnt take it that you didnt think it was a good idea either. I just wanted to let you know that it is a really good idea to do it that way. Have fun.

 

Actually, that's not entirely true. Most Honda/Acura drivers who install the big Bosch fuel pump with the stock fuel-pressure-regulator still in place see a rise in fuel pressure. The pump sends more fuel to the rail than the stock regulator can release back to the tank, resulting in a pressure rise.

If you have a regulator that can scavenge enough fuel, however, you are correct, you won't see a pressure rise.