Can a portable fuel tank(or any tank) be vented too much that it would cause poor fuel flow and cause a motor to bog out like it ran out of gas?I know having no venting and a pressure build up could cause poor or no fuel flow.I decided since my older tank had no vent on cap to make one.Just curious since my motor acted like this briefly and after pumping up primer bulb it was fine for remaining time on water.Primer bulb new, fuel pump new and engine has been running better than it ever has.thanks