1979 Mark V Hard To Start

Hi Bill –
Thank you for getting back to me on the A/C issue with my Mark V. I will share with my mechanic..
I have a new issue… I previously had my mechanic work on the carb to get it to where it starts just like the owners manual advises where if it sits idle for a few days or more, then depress the accelerator pedal two or three times. After I got the car back all was perfect with the cold start where I would do like the owners manual advises and it would start up in like 3-4 seconds in which I would let the choke warm up and then drive away no problem. In the past few months, the cold start process is taking longer each time even if starting the car the very next day. It will just crank and crank and then start after now up to 6-10 seconds. It never did that before and seems like each time the cold start process is taking longer each time I go to start it. Keep in mind that this is happening here in Phoenix, with a brutal heat wave in which some days the air temp is 118 degrees, and the car is stored in a enclosed storage facility. I had the mechanic replace the power valve twice in the carb now and I am wondering if that is the issue again, or is it the brutal heat or vapor lock? I had the gas tank cleaned out, and added fresh gas with a fuel stabilizer that they said I should use since I don’t drive the card that often. By the way, when I drive the car, no problem at all with acceleration or deacceleration – it’s just this recent cold start issue taking longer, and keep in mind I sometimes go to the storage facility to start it say on a sat morning and the temp outside is about 85-90 degrees. I also had a new fuel filter put on it as well. I appreciate your help with this new issue.
Bill
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Hi Bill –
Agreed, it does sound like a fuel mixture or fuel availability problem. Have your mechanic check the carburetor for cold choke operation and the availability of fuel from the internal carb air inlet under the choke butterfly to the engine from the accelerator pump while pumping but not cranking when the engine has been sitting COLD. Fuel in abundance must be available immediately for an instant cold start.
Sincerely,
Bill