Car won't idle.... again

67Dart273 said
Condition of the fuel tank and system?

Fuel Tank is a brand new aluminum cell

What do you have for a carb?

950 proform

mguner said
Do you run without an air filter at the track? Might have a speck of something in an air bleed. Rev it up a little and choke it with your hand while the throttle is open a few times and see if that back flushes it out. Also, I don't know how true the metering surfaces are on a pro form compared to a Holley but I've had to file many a Holley true to get the metering block gaskets to live. They will work for a while but if it isn't flat they will fail after a while.

They are pretty well machined. No, I use a K&N extreme so there is no point to running without a filter.

Update, I started it up last night with the intention of nursing it to the store to by a siphoner ball and hose. Car was a little rough on startup, not missing but a little rough. It idled and I went to the store. It never did it. Never tried to stall. I think I got bad gas, twice fromt he same place. I'm thinking they are getting the 93 octane by adding more alcohol.

Here is my theory, the car wants a little more throttle at idle to run. Last time I told my engine builder the car will burn your eyes standing behind it. alcohol will burn your eyes. I know it wasn't running rich for several reasons. I believe it was the alcohol content.

My tenant and friend comes home and I tell him what went on and he said he has had issues with the same gas in his Turbo Kia which burns premium. Rough idle, really shitty mileage (400 vs. 500+ miles per tank)

Now that car will self adjust but my carb won't. I'm thinking fuel.