The Ford Barn - View Single Post - Model A Lagging and Popping when Accelerating

Banditorama · 10-05-2023, 11:01 AM

What works for me on cold starts is:
Ignition advance fully retarded
Throttle lever pulled down 2 or 3 notches
GAV valve 1/2 turn further than it's normal position

Then pull the choke and hit the starter simultaneously. It fires up and I release the choke. Then pull timing down about halfway but leave the GAV/throttle lever alone.

I Then adjust the GAV until the engine runs as smooth as possible and let it "fast idle" like that for a minute or so. Usually that means I'm adding a little more fuel via the GAV to smooth it out

Then after a minute or so after that drop the idle back down and take off. I've got a temp gauge, so once engine temp hits about 130*f, I back the GAV down to its normal position

No pops or problems with that method. Engine runs nice and smooth from cold start

10-05-2023, 11:01 AM	#10
Banditorama Senior Member Join Date: May 2023 Posts: 173	Re: Model A Lagging and Popping when Accelerating What works for me on cold starts is: Ignition advance fully retarded Throttle lever pulled down 2 or 3 notches GAV valve 1/2 turn further than it's normal position Then pull the choke and hit the starter simultaneously. It fires up and I release the choke. Then pull timing down about halfway but leave the GAV/throttle lever alone. I Then adjust the GAV until the engine runs as smooth as possible and let it "fast idle" like that for a minute or so. Usually that means I'm adding a little more fuel via the GAV to smooth it out Then after a minute or so after that drop the idle back down and take off. I've got a temp gauge, so once engine temp hits about 130*f, I back the GAV down to its normal position No pops or problems with that method. Engine runs nice and smooth from cold start