5.0 LX 4-BBL Hard to start when warm

[keviwe]

1989 5.0LX four barrel Rochester carb. After fully warm, no throttle advanced, engine cranks for maybe 10 seconds before gradually starting. Runs great after finally starting. It used to start much quicker. I will put a carb rebuild kit in but I don't think that will improve it since it runs great after starting and starts great when cold. Wondering if there is a vacuum diaphragm that activates the accelerator pump at initial cranking that could be leaking????

 

[makomark]

that's all mechanical linkage...verify the choke is open when hot...

and try opening the throttle a bit when trying to start hot...the 'gasoline' that is sold today is not the same blend as 15 years ago, let alone when your engine was new....