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by primed are you supplying a fuel source if so then the car is not getting fuel to burn. this indicates your fuel pump is bad and needs replacing and change the fuel filter also. the reason the pump won`t work sitting overnight is that the pump can`t build up enough pressure possibly because the fuel pressure is not being held, but after the first start up the system can maintain enough pressure to start through out the day. you can have the fuel pressure and volume checked with a gage when the problem occours to verify.
If your fuel system is loosing it's prime you have a leak. Look for oily looking mess around any of the fittings around the fuel filter any part of the system. This is the only way you can loose prime is with a leak. Check any copper sealing rings for signs of leak.
not really,if it's a diesel you should have a primer on top of the filter,you have to press that around 30times to prime,if it's gas you should already have pressue with key on after 2sec,check filters and make sure you didn't install them backwards flow.
If it ran fine before you changed the filter, then did you prime the system before trying to start it? To do this, simply turn the key on but don't crank the starter then back off. Do this three to four times and what this does is builds pressure back in the fuel lines because when you changed the filter you lost the pressure and now will have a air bubble in the lines until you prime it. Hope that helps