Weber problem, still can't start, HELP!

[joehahn]

Heeeey,
I have one of those pressure regulators too! Until my mechanic told me what it was I referred to it only as "shiny round thing with dial on it"! So, tell me what pump to get. I looked at pp online catalog and the only thing they had was $235?? I always try to patronize but I don't want to spend that if I don't have to! Other cataologs have rebuilt for approx 140-165.

The pump pictured above looks cool (shiny, like pressure regulator!). I could easily fabricate a bracket out of something to hold it in there, otherwise do I just hook it up and I am all set?

[john walker's workshop]

Carter, as well as others makes a small, inline pump available at auto parts stores for cheap. make sure it only puts out 3-5lb pressure or you will need a pressure regulator between the pump and the carbs. the cheap chrome regulators with the twist dial are prone to failure.

[andrew15]

Al of this talk about pumps and lines for carbs has me wondering a few things. It looks as if the previous owner for my car - 1970T w/Webers - has put in a aftermarket pump ~3-4 pounds pressure, and re-routed the fuel lines. Most diagrams show two fuel lines: one to the pump and regulator and a second return line to the fuel tank. My car only has the line from the pump to the carbs. connected - No return line. Is there a problem with this configuration?

[andrew15]

whoops

[This message has been edited by andrew15 (edited 09-26-2001).]

[Zendalar]

You sure your car has always had carbs? I mean sometimes fuel injected cars get carbs and the fuel pump is not replaced. I have heard that the return line with carburetors causes trouble. Well, removed it and its working fine without it.

[Formerly Steve Wilkinson]

Huh? My '83SC had CIS (of course), and now has PMOs. Works fine with the return line, which is what provides the pressure regulation (via the little adjsutable clamp on it). Can't imagine how it would run without a return line, and PMO can't imagine it either.

stephan

[john walker's workshop]

plug the return line when changing to an inline fuel pump. it does not need it. the old pump was configured to return fuel to the tank. the replacement ones don't. the 83 that steve is talking about uses the stock 60# pressure pump and a loop out and back to the tank. the carb feed is tapped off of the loop. to create pressure to the carb line, the return line is restricted slightly with a clamp to produce 3# to the carbs. without the clamp, there would be no pressure.(it's easier for the fuel to return to the tank). the stock CIS system restricts the return line by way of a check valve in the fuel distributor to get it's system pressure.

[andrew15]

Thanks John, the above makes perfect sense.