New engine starting differently (when cold)?
Thread Starter
Pro
Joined: Jan 2005
Posts: 535
Likes: 0
From: Southaven MS
New engine starting differently (when cold)?
I have just recently put in a new 383, with the old style afr 190 heads. I have the same edelbrock 750 afb style carburetor as the last engine. Anyway the new engine seems to like to have the carburetor pumped 2-3 times and the throttle held open about 1/2-3/4 of the way open to start. This seems odd b/c the old engine just required a few pumps and the engine would start without the throttle partly open.
From my basic understanding that seems like the engine is flooded a little, but it does not start at all unless I pump the accelerator some.
FYI: This is when it is cold.. when it is warm it likes to have the accelerator cracked open a little. It will start without doing that, but it starts easier if I do.
Dose anyone have any ideas?
Thanks
From my basic understanding that seems like the engine is flooded a little, but it does not start at all unless I pump the accelerator some.
FYI: This is when it is cold.. when it is warm it likes to have the accelerator cracked open a little. It will start without doing that, but it starts easier if I do.
Dose anyone have any ideas?
Thanks
Safety Car
Joined: Aug 2001
Posts: 4,883
Likes: 11
From: North Easton Mass
In my experience I have found that every car (not fuel injected, and even some of those) has its own routine for starting. Once you figure out what the engine needs you are all set. Just pass that info along to the next owner when you sell the car.
Rick B.
Rick B.
Le Mans Master
Joined: May 2002
Posts: 5,086
Likes: 786
From: Lebanon Township New Jersey
I am old enough to remember when brand new cars had carburetors, with no wires attached to them. The manufacturer recommended starting procedure was to push the gas pedal to the floor (to set the choke) release the pedal then step on it slightly and turn the key. Release the pedal when the engine starts. The choke would maintain proper idle speed.
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
Your new motor requires a little more fuel than your old motor with the same carb. A bigger cam would not have as much vacumn when cranking requiring an extra pump of the throttle.
Burning Brakes
Joined: Jun 2005
Posts: 764
Likes: 2
From: THE OLDER I GET THE BETTER I WAS! NORTHERN ONTARIO
I am old enough to remember when brand new cars had carburetors, with no wires attached to them. The manufacturer recommended starting procedure was to push the gas pedal to the floor (to set the choke) release the pedal then step on it slightly and turn the key. Release the pedal when the engine starts. The choke would maintain proper idle speed.
yup me too...
