Ive got a 67 firebird and recently I have had some hard start issues.
Its only after its been sitting for a while, like overnight.
It turns over just fine, had plenty of spark, the problem is fuel...
When I first hit the key it just barely fires but doesn't 'catch' and keep running, i then have to continue cranking for like 45 seconds to get it to start. For that 45 seconds or so it sounds like its just freely cranking over without any fuel.
So this morning I pulled the top of the carb off and the fuel bowls were empty, and the line to the carb was dry.
The float adjustment was fine, the filter screens were very clean and the needles and seats looked good
It has an edelbrock 1406 carb (600 cfm, electric choke) and a mechanical pump
So, i guess my question is what should keep the fuel from draining out of the carb, is there a check valve in the fuel pump?