stkmn

i have a 69 tripower will not idle unless the butterflies on end carbs are slightly open if you close them it stalls

toobroketoretire

Its supposed to get it's idle air from the center carburetor only so open close the end butterflies and open the center butterflies a bit more.

jps81c10

If I close off the end carbs I have to hold it about 2000 rpm for it to stay running and even when I close the end carbs you can still feel them pulling air

zuendler

Seems your idle circuit of the center carb does not work.
How are your idle screws set?

gungatim

that's because there is an idle circuit in the end carbs. It is a fixed circuit and is not adjustable. Do NOT adjust the end carbs to try and get an idle, this is done with the center carb.

set your WOT fuel mixture first, then set the float levels. float level is extremely important and setting it incorrectly will have a dramatic affect on idle. do not set the level too high.

obviously make sure everything is clean and no vacuum leaks first, etc.....

wzschirnt

Hi,

If it runs at rpm over 2000 (that's about where the idle circuit quits and the main circuit takes over), the idle circuit on the center carb is plugged. Take out each idle mixture screw (motor not running) and squirt carb cleaner in there. Should come out of a hole on the side of the carb throat under the throttle plate and out of the idle air bleed hole (front ledge of the carb inside the choke tower, facing up). There are 4 holes there - the 2 center ones are main jet bleeds and the 2 outside ones are idle bleeds. You may want to put your hand or a rag over the bleed hole or carb cleaner will go everywhere. Both places should flow freely. If they don't, make them. Afterwards, put each idle screw back in and back out about 1 3/4 turns. That will get you in the ballpark and adjust from there.

Good luck.

walt z.

7T1vette

What he said....

454Luvr

I had a Holley once that wouldn't idle. Wasted a lot of time working on it, turned out the PO had installed the wrong metering block gasket. It looked virtually identical to the correct part, but one or two of the holes weren't there (or were misaligned, I don't remember exactly from 35 years ago). Anyway, maybe the guy who rebuilt the center carb used the wrong gasket. Just something to consider.

Ironcross

are the two vacuum pods still on the end carbs

a picture maybe?

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