very hard to start

[fwi]

Takes 5 or more starts to even begin idling without me goossing the throttle...
440, roller motor, Holley 750 no choke, 2 speed Holley blue pump, 9.5 compression. Have not put the timing light on it.
Is it the carb tuning, electric fuel pump or timing?

 

[Propwash]

Is this all the time, or after it has been shut down and sits for a bit?

 

[super-bee_ski]

I know I will get a lot of CRAP for saying this...BUT: It is my belief and lots of DATA to support this, Carbureted cars will NOT run well on this new Gasoline!

Especially you and I here in California.

This new gasoline is formulated for "Closed System" fuel systems. Pressurized.
It is a known fact Ethanol causes moisture buildup in a NON-fuel injected system AND causes poor starting in cars/trucks with carburetors.

This, along with perhaps mis-adjusted ignition timing and or improper setting on carburetors are many reasons we are having issues.

 

[miller]

May well be...

But, a choke might help a bit.

 

[67 coronet]

well,with no choke you may have to feather it a bit to keep it idling on its own.how big is the cam and what is your idle speed set at?i have no choke,huge cam,and strait through intake.takes a couple tries to idle on its own.open plenum intakes are very cold blooded,depending on your set up.

 

[Propwash]

I know I will get a lot of CRAP for saying this...BUT: It is my belief and lots of DATA to support this, Carbureted cars will NOT run well on this new Gasoline!

Especially you and I here in California.

This new gasoline is formulated for "Closed System" fuel systems. Pressurized.
It is a known fact Ethanol causes moisture buildup in a NON-fuel injected system AND causes poor starting in cars/trucks with carburetors.

This, along with perhaps mis-adjusted ignition timing and or improper setting on carburetors are many reasons we are having issues.

I won't be the first to argue Ski, I think you're dead on. Fuel started to really change in the 90's and I spent several years fighting an uphill battle, until finally coming to the realization on how the present fuel and old engine dynamics just don't jive. Luckily there's ways to just about remedy it.

 

[66Satellite47]

Ditto on 67 Coronet. In my experience most any "warmed over" motor takes a little feathering for a bit before idles on its own. Check the timing, look for a vacum leak/disconnected hose.

 

[khryslerkid]

Bet you're having cooler weather out there than normal too. Get a choke or see how long you can get by with letting it idle till it warms up. As soon as you open the throttle, that rush of cool air will stall it. If youre having the same problem when it's up to operating temperature then it can be timing, carb tuning, vacuum leak, too low of an octane, as said previously, crappy gas that we're all dealing with.
Keep us up to date.

 

[GTX MATT]

A choke would help, you're likely going to need to hold the Rs up a bit for a minute or two.

More initial timing will help, and of course fine tuning the carb will.

 

[fwi]

The other 65 race car that I just sold had no choke and always fired up instantly after 3 full pumps, and you could just walk away from it and it would just keep on running forever.
Since I just bought this one I am not yet all that familiar with it. the fuel is fresh 93, the carb is suspect as is the timing, however until it idles I can't really check timing.
67 coronet, I have the same intake as yours.
It is hard to start when cold, if it has warmed up it starts easy.

 

[Bigal75]

Mine won't either until a bit of heat builds...everything is tuned and dead on. It's worse when it's really cold.

 

[Hemi Rebel]

Takes 5 or more starts to even begin idling without me goossing the throttle...
440, roller motor, Holley 750 no choke, 2 speed Holley blue pump, 9.5 compression. Have not put the timing light on it.
Is it the carb tuning, electric fuel pump or timing?

If you are getting fuel to the carb its not a fuel pump issue. Most likely a combination of timing and carb adjustment. Since you never had a light on it, you want to do that regardless of how it runs cold. Once thats done then you can tweak the carb. Just know that performance mods with holley carbs that dont have a choke make for pita on cold starts.

 

[Propwash]

I have no choke either on my QF950. No issues starting, a few pumps, but once she starts it needs some RPM to keep running for about a minute.

 

[The Horvaths]

Assuming that one has a choke, there's little to no harm in turning up the fast idle speed screw a bit. It's only utilized when the choke pulls the fast idle cam up.
Also, IF you are running a "winter blend" gasoline, you will have easier starts but a much greater propensity for vapor lock once things get heated up.

 

[67 coronet]

The other 65 race car that I just sold had no choke and always fired up instantly after 3 full pumps, and you could just walk away from it and it would just keep on running forever.
Since I just bought this one I am not yet all that familiar with it. the fuel is fresh 93, the carb is suspect as is the timing, however until it idles I can't really check timing.
67 coronet, I have the same intake as yours.
It is hard to start when cold, if it has warmed up it starts easy.

at about 60 degrees outside it is very cold blooded.starts after about 3 pumps of pedal,but need to feather it for about a minute or so.then need to let it warm up for a good 3 to 4 minutes or will try to stall when i hit the gas.alot depends on how big the cam is.i have advanced about 20 degrees initial time because the cam is so big.

 

[The Horvaths]

Takes 5 or more starts to even begin idling without me goossing the throttle...
440, roller motor, Holley 750 no choke..
..Is it the carb tuning, electric fuel pump or timing?

To answer the original question: it is almost undoubtedly the lack of choke. Alternatively, you could run it very, very rich. So rich that it could (perhaps) overheat the exhaust once it warmed up. Not a great idea. Why no choke? They serve a purpose. Adjusted well, they are worth the effort.

 

[fwi]

Why no choke? They serve a purpose. Adjusted well, they are worth the effort.

I just bought this one as is.

 

[miller]

Fine tuning either carb, or timing is normally done after engine is at operating temp.

But, without a choke, only thing you can do is maybe 'slightly' richen the mixture, to help the cold start. Saying richen both mixture screws, 1/8 of a turn out, to see if it helps. Still going to be nature of the beast. Even after doing fine tuning while warmed up, used to set mixture dead on, and add slight richened adjustment to help the cold start.

 

[fwi]

I've opened both screws to 1.5 turns out from where they were at 1, seems to fire up easier but still working on that idle..
Perhaps barometric pressure and temp have something to do with this, the car came from Wisconsin.

 

[mopar 3 B]

67 coronet

just curious what type air cleaner you using in that scoop?