Hey guys! New to the forum! I just bought a 1972 240z. Its got a dual weber carb setup but they both need cleaning. It runs and drives. Right now I still need to clean the gas tank because gas has been sitting in there for over 5 years. Im running gas out of a gallon milk bottle. I took the rubber hose that connects to the fuel rail coming from the gas tank and put that in a plastic milk thing and also put the return line in there too. It used a whole gallon of gas just driving around the block. I was in 1st gear the whole time because i couldnt get enough speed to get into second without it bogging down. (carbs need cleaning like i said) im not sure what RPMs i was at (tach's broken). I was probably at 5 or 10 mph. Should it be using that much gas? Whats the problem?

Thanks guys!

AUSTIN

I have never seen a dual WEBER setup in a Z car before so what you are giving is somewhat vague. No it shouldn't use that much fuel and chances are if it was sitting that long the carburettors probably need to be rebuilt with all new internals. Easily done though and not all that expensive. Or maybe consider investing in a set of Skinner Union's. Without actually being there to see and perhaps smell it is not easy to diagnose. Continue troubleshooting and keep us posted on the progress

For a start does it have the origional engine. Check the numbers on the block just above the starter motor. It should start with with L24. I'm with esmit. Fit a set of the origional SU carbs.

I have the dual Webers, and like yours, mine sat for many years. Both of the floats were stuck in the open position, dumping gas in the engine. Check that they aren't dripping. Mine was pouring so much gas that I had to change the oil after fixing the carbs.

Hope this helps.

-Justin

I think one of the floats is stuck on one carb. The other carb i dont think is doing anything. Ill clean them out and fix that float. Then report back

a wile back wen i got my 240z i had a a **** lode of problems so i got read of my weber's and i put a holly 390 4bbl cfm on my z and i got a az 4bbl intake for it and now i got about 16 to 19 gal to the mile but now i have a 2.6 in it now and i love it ... but any ways wen i had them on there i got bout 3 maybe 4 gal to the mil then i used seafome it helpt me out a lot it unjam'd my carbs Cline them out and the fuel system out to and after that i got bout i think it was bout 9 to 11 gal to the mi then i put the seafome in my oil crank case then i ran that in my oil for 200 mi then i changed my oil i put and a k@n oil filter on her after that i got bout 13 to 17 mi to the gal depending on how i drove her so ya tye using some seafome i hope this will help you out some

Jeremy , please when replying, use real sentences and complete words.

Reading your reply gave me a seizure .

It's practically graffiti .

You're kidding right? You've got so many other serious issues with the car right now ("I'm running gas out of a gallon milk bottle") that fuel mileage is the last quesiton you should be asking here with your second post. Get the car operating properly first.

i hope this will help you out some

Maybe it would if they could read it. Hard to tell with the misspellings, bad grammar, improper terminology, .....starting to wonder if this is like the one we had a couple of years back that was just a 'put on' the see the reactions.

Edited January 7, 201213 yr by sblake01

I have never seen a dual WEBER setup in a Z car before

You've never see dual downdrafts (DGV's) on a Z?