Starting problem

[Elky 83]

I have a 350 with a Holley double pumper. No choke.
When I first start it, I pump it a few times and it starts ok. Maybe a little rough at first but smooth when it warms up. Drive to the store and when I get back it is a hard start even though the temp is around 165.
Can get it started if I pump the gas again. In the past it has always been a quick start with no problem after the first warm up.
Going to use some carb cleaner tomorrow and see if that helps. Could it be the manual fuel pump?
Any other ideas?
Thanks in advance,
Mike

 

[Blake442]

Do you have a pressure regulator? It sounds like it may be flooding itself. Either that or possibly leaking seals are allowing the fuel from the bowls to leak into the intake manifold, which will drain the carb, and flood the intake. How old and what size is your carb?

 

[Elky 83]

Its a Holley 650 Double Pumper and is about 4 years old. It does start up ok if I pump the pedel, but up till now after the first start up it would start when I just touched the key.

 

[bowtie81]

accelerator pump diaphram, bad power valve

 

[dan2286]

Sounds like what Blake said.