no fuel

hey guys im putting 28mm mikuni koygo slide valves on my 77 chevy luv i havent been able to get fuel to come out ov the needle jet if someone could give me a run down of where my lines should go that would help...at the moment i have fuel goung to the fuel supply via the stock fuel pump and it is filling up the bowls also i have a inline filter right before the carbs..i have drain lines coming from the bowls and vaccume on the fitings on the 2 and 4 carb also there is a fitting on the 2nd carb but i dont know what that is for

What the ???. First, good for you to try this.
But is that LUV about 1800cc? Small carbs for that.
1st the 2 vacumn lines, are just bowl vents.
The chokes are just enrichener tubes.
Have someone crankover the motor.
And hold your palms over the outlets of the carbs.
Feel for suction, if you have that it should draw fuel in.
What made me think here! Is in the 70's Bill Hahn used a GM ignition from a Chevy LUV 4 cyl. to make his turbo pressure retard, belt drive ignition for the Z1 - KZ900's.
I used 1 of them for years, standard 4 prong ign module.
The distributor cap was from the 4cyl LUV, only thing is
you had to turn about .025 thou off of the bottom lip.
Boy I sod that before ebay. Still got $75 for it.
There is your chevy LUV history lesson for today.

Go back to the drawing board and put 2 Harley carbs on a manifold, Weber side drafts or SU's

Most of all BE CAREFUL! with gas and spark and battery

so it should be mixing fuel and air, are there some problem areas that i could check...and should the bowl vents have vacume or not if not then im confused because thats where u r suposed to sync them right

Here's an example of carb connections.
This particular example (yellow color) has a 5th vacuum nipple dedicated to a vacuum petcock.

Vacuum nipples are capped during normal running (or sometimes one is used to operate a vacuum petcock).

The bowls vent to open air (no vacuum).

These carbs are designed to function with fuel being gravity fed to their flow bowls through a float valve (needle and seat).
Wondering if the fuel pump might be over-doing the fuel supply into the carbs, perhaps resulting in constant overflow through the nipples on bottom of float bowls.

The fuel valves are prone enough to leaking with only the expected gravity feed. Seems the fuel pump would be even worse.

Good Fortune!

[Click on image to enlarge view.]

this is exactly what i needed

In the example shown, there's a "fuel pump" at bottom of 2nd carb from left, which is manually operated on fuel already gravity fed into the float bowl.

Can't see whether the carbs at hand might have a "fuel pump" on the bottom of one carb.

Many motorcycle carb foursomes are not equipped with a fuel pump (which is an added complexity).

As I recall, the fuel pump was introduced to improve low speed response incident to compliance with the then new EPA leaner exhaust emission requirements during the late 70's.

Good Fortune!

yeah my carb dont have that its just the bowl with one nipple

There is a guy NYTRDR24 over on the mazdabscene site who has built a manifold and installed Weber 45 DCOEs on a Mazda B2200 truck.He might be able to give u a hand also.good luck.bj

the truck isnt running...timming is right... i have spark it dosent seem like the fuel is moving...

i called my brother over and said hey turn it over real quick so as he was turning it over i sprayed some starter fluid and it ran wide open for about 5 seconds then it back fired and blew my preheater hose all to pieces...i had a nice fire goin lol so im going to make a better intake and go over my timming and see if that will work

well i have tried to gravity feed it and it still dosent work