Hard starting problem: Help me diagnose my car

[cocoy_01]

Hello guys, i have a problem with my car. Its a carby, contact point type car.

Lately, i experience hard starting when the car has just been parked for half an hour, when it was just turned off or overnight(kahit kelan hard start na). The engine cranks and all, pero ayaw tumuloy ng start. Even apakan mo accelerator to help the engine start, walang kwenta. I know this is not normal, kasi dati one-try lang okay na.

I also encounter yung parang pumupugak pugak yung oto, even at normal speeds(40kph) or if ihahataw ko.

Carb newly overhauled by A & M
Fuel filter good
Battery good (checked)
Alternator good (checked 14v on idle, 13.8v acc all on)
Timing set already
New contact points/condenser (genuine)
Plugs cleaned
Valve clearance adjusted

Possible problem?
Timing
ignition coil
carb
fuel pump
etc..

please help me, daily driven pa naman ang oto, yari pag tumirik.