Quote:
Originally Posted by joseph c
this is now a consistant problem. it does it every cold start and now some times during warm restart. cap and rotor are in fair shape, idle changes when removing the opv(car stalls). it is now requiring more engine cranking before the start up when cold. I will replace the check valve this week and let you all know how it works. 
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Have you tried turning on the ignition a few times before actually cranking it? I would imagine that turning on the fuel pump a few times would build up pressure that might be lost due to a faulty check valve...