Fuel Pump One-way check valve

[@danpettis1675]

great video. this just confirmed just what I suspected

[@Nyck461]

I liked your video.

[@Nyck461]

If you have problem with check valve or pump pressure will the car run rough when in highway or not?

[@wyattmccandless]

I've never seen a one way check valve have any effect on the way the vehicle runs other than causing an extended cranking period when starting. Bad fuel pressure will definitely cause that though, but there's a long list of other things as well