AGH, so I get the old walbro out and it looks totally different from the one I bought. It has a black male harness on the top of it that just plugs into the cars harness. The one I bought is much longer (1"-2") and doesn't have the harness on top. I figured since I was swapping walbro for walbro it would work fine. The one I bought was the universal walbro and all i got from summit was the pump in a little bag. Nothing else. The top fuel connection doesn't even fit in the mounting brackets hole it is too big. Do I need to return it? Will it work? Thanks guys.

refer to post #16

I wish I had done that before I bought my down the road at summit. They gave me the external pump so I ordered the pump online and I'll return the old one. I just wish I hadn't spent the time getting to the other one. Oh well

Sorry I missed the remainder of the posts, but yes, its sounding like your pump is shot. I bought mine from lightning, and would recommend the same. Let us know how it goes.

I love my car again
 

So I finally got my new Walbro on and it is running like I remember, maybe better :) I really didn't think it could be the pump because the walbro i had was only 2 years old and maybe 10k on it so I checked everything else first and just about went insane. :vash: Anyway, thanks for your help guys.

Strange that a "well known" and respected fuel pump manufacturer's pump would go out in 10k miles. What is that all about? And what do you guys think about the cause? Is this possibly a result of running a FPR that demands more pressure than normal like us Greddy guys do?

I've had one fail on my civic in about a year. More performance, less quality control, I guess.

too much fuel.



12:1 FMU + walbro + 10psi = +120psi of fuel

look at my fueling with a 7:1 disc:

http://boostedmiata.com/wideband/7psi_265cc.jpg

IIRC I was using a 4:1 disc for 10psi

http://boostedmiata.com/wideband/9psi_265cc.jpg