Tri Power Trouble

[Tim G.]

My '67 400 horse car cold starts fine after sitting for a long time. After starting, it will run fine and idle smooth. When I shut it down, the only way to start it back up when warm is to crank and crank with my foot all the way to the floor until it sputters and starts.
I've been able to determine that the front carb is dripping fuel into the intake and flooding the engine when I restart the car. I've checked the float level and it appears fine. What would cause the fuel to drip so heavily into the intake from the front carb?

[Clem Z.]

Re: Tri Power Trouble

needle and seat leaking fuel after you shut off the engine. the std. needle and seat are .110 ID.part #6-504 and i would recommend you replace them with .097 ID,part # 6-506 ones that seal easier because of less area and will cause no fuel flow problem unless you are racing.

[Tim G.]

Re: Tri Power Trouble

Thanks for the information, no racing, Clem.

[Wayne K.]

Re: Tri Power Trouble

Tim,

You didn't say at what point the fuel is leaking from the carb. I would also check the condition of the float and its setting. You can also experience leaking due to warped parts.

Wayne

[Wayne W.]

Re: Tri Power Trouble

Its got Holley-itis. A common disease. The metering block is leaking into the idle circuit which causes flooding. You will have to straighten up (replace) the meetering block and re-gasket to solve the problem. A sorry design that two more screws would have eliminated, but they never changed it even to this day.