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Weber fuel pump?(new questions on setup)
Posted 15 March 2004 - 11:24 PM
Your thoughts please.
Posted 15 March 2004 - 11:43 PM
Pressure 2.6-3.3 psi
Volume 10 gallons per hour.
I'm running a stock pump with my weber and it seems to do great with just a couple exceptions. Pull a lefthanded U-turn and it will die and sometimes it will diesel on shutdown. I don't think the dieseling is a result of too little fuel tho. Too much if anything. What symtoms is your old pump giving you?
Posted 16 March 2004 - 12:41 AM
I also noticed when I had the top of the carb off to replace the power valve that I destroyed that there wasn't a lot of fuel in the bowl. This means that either the float level is off (unlikely since I bought the carb new last fall, but I can check it if that sounds likely), or the fuel pressure is inadequate. Since you say the stock pressure on a new pump(thanks for the info, by the way) peaks at 3.3, which is on the bare minimum end of what the weber apparently wants, I would think that this could be a likely culprit.
Posted 16 March 2004 - 12:45 AM
Posted 16 March 2004 - 01:40 AM
Posted 16 March 2004 - 02:05 AM
I am running the stock fuel return line, as I've been told that our stock pumps don't like to be "dead-headed", or run without a return line. When I've got some time next week, I'm going to pull the line and run it into a jar to see what kind of volume I'm getting, as well as pulling the top off the carb to check the float travel just to be sure. I might just break down and buy a fuel pressure gauge too.
Yeah, I don't get it why some webers are fine with the stock fuel supply and others aren't. I would suspect mine wants more fuel at high throttle settings because of the hi-po cams it now has, although this problem seemed to exist beforehand as well.
Posted 16 March 2004 - 05:01 AM
Posted 28 March 2004 - 06:14 PM
Yet another question. The hitachi carb and stock fuel pump utilizes a return line. With the weber carb and aftermarket pump, does the return line need to be used, or should it just run straight into the carb? My weber came with a fuel line fitting that just goes straight in.
Any help would be greatly appreciated.
Posted 28 March 2004 - 08:59 PM
I prefer to run the return line. Makes sense to me to give the fuel somewhere to go. I've seen alot of muscle cars that run no return. If this is because of the huge amounts of fuel they use or the mechanics of the particular pump they have, I can't tell you. Anybody know?
Posted 29 March 2004 - 02:12 PM
There is another common brand of pump other than Carter that doesn't cost so much but I forget the name. Ask at a shop that caters to the aircooled VW crowd and they'll hook you up.
Posted 29 March 2004 - 02:34 PM
You should check the float level. Some have been set kind of low. It sounds like the bowl may be emptying itself. My '86 Brat (lifted) is running the stock pump with a regulator(probably not neccessary) and has no issues.
Posted 29 March 2004 - 09:33 PM
Yeah, emptying of the bowl is exactly what it feels like. It goes like a bat outa h*** for a while then falls on its face (3rd gear up hills SUCKS).
I bought a 2.5-4.5psi pump from NAPA and an adjustable regulator from Schucks today. I should be able to install them tomorrow morning before class, and if it gives me any more trouble I'll mount a fuel pressure gauge so I can verify the actual pressure. The float travel will also be checked just to make sure.
I figured that the return line was necessary, I just wanted to make sure since the Weber is a new world for me and I didn't want to make a boneheaded mistake.
Ahhh yes, an engine that runs like it should is a lot closer to reality.
Posted 30 March 2004 - 02:09 AM
Posted 30 March 2004 - 02:47 AM
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