HELP! 67 Coupe issues with Carb? Power? Fuel? ??

ynasef

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Nov 18, 2020
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Hey everyone,

I have been having a lot of trouble getting my 67 coupe started lately. I ordered a new Edelbrorck 1901 AVS2 500 cfm carb and installed it, the car ran great and no issues at all!

Due to circumstances, the car was parked after that for 2 to 3 months. Now, when I came to start the car again, there was a transmission leak, which I fixed and replaced everything. The car would crank but would not start.

Suddenly the car turned over and started but was rough and not idling properly, I managed to drive a short distance and then it would not start unless I have my foot on the gas pedal, as soon as I lift my foot off it would just die.

I checked the power supply and everything seemed to check out. I replaced the Spark Plugs, MSD Coil, Rotor and Cap on MSD Ready to Run Distributor, Checked the Spark Wires, Cleaned the Carb and there was not gunk in the bowls, Replaced the Starter Solenoid with a brand new one, and STILL NO GO!

Every time I try to start the car it would crank and turn on as long as I have my foot on the gas pedal, BUT AS SOON AS I TAKE MY FOOT OFF, IT DIES OUT! What is going on here? Can anyone help, I have been trying to figure this out for a long time now.
 
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MustangIIMatt

I need something stupid to play with
Mod Dude
Mar 7, 2002
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What has likely happened is that your gasoline in the tank has gone stale from sitting. Modern gasoline formulations do so in 30-90 days. On top of that, the only bad thing about an Edelbrock carburetor is that it is prone to gasoline evaporating from it when it sits for more than a few days, which can leave deposits behind.

Drain the old fuel from your tank and fill it with fresh fuel, crank the engine for a few seconds with the coil disconnected to fill the bowls of the carburetor, re-connect the coil, and try to start it again.
 
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ynasef

New Member
Nov 18, 2020
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Bahrain
What has likely happened is that your gasoline in the tank has gone stale from sitting. Modern gasoline formulations do so in 30-90 days. On top of that, the only bad thing about an Edelbrock carburetor is that it is prone to gasoline evaporating from it when it sits for more than a few days, which can leave deposits behind.

Drain the old fuel from your tank and fill it with fresh fuel, crank the engine for a few seconds with the coil disconnected to fill the bowls of the carburetor, re-connect the coil, and try to start it again.
I found the problem today after opening the top part of the carb and doing some cleaning and adjustments. Turned the car on and realized that the Primary Booster Venturis were blocked and were barely spitting fuel!!

Now I will remove those venturis and probably soak them and clean them, But what should I soak them in?
 

MustangIIMatt

I need something stupid to play with
Mod Dude
Mar 7, 2002
8,742
4,467
224
I found the problem today after opening the top part of the carb and doing some cleaning and adjustments. Turned the car on and realized that the Primary Booster Venturis were blocked and were barely spitting fuel!!

Now I will remove those venturis and probably soak them and clean them, But what should I soak them in?
B12 Chemtool if you can get it, another non-aerosol carburetor cleaner if you can't.
 
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ynasef

New Member
Nov 18, 2020
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Bahrain
Maybe check for vacuum leaks as well.
I found the problem today after opening the top part of the carb and doing some cleaning and adjustments. Turned the car on and realized that the Primary Booster Venturis were blocked and were barely spitting fuel!!

Now I will remove those venturis and probably soak them and clean them, But what should I soak them in?
B12 Chemtool if you can get it, another non-aerosol carburetor cleaner if you can't.
Great! Thanks. I got a bottle of B12 Chemtool today and will do the soak and see. Thank you for your help