Was on my way to Ford to have a diagnosis done for some issues my car was having and I had just recently bought it. On the way there oil pressure dropped and a loud knocking was coming from the engine, could not get it to Ford so my brothers helped look at it and my timing guide broke so replaced that, chain and gear. Then needed new starter and now the oil pressure stays good but it wont go over 2500 rpms. It bogs out. But when I first start it it sounds perfect and strong just when it gets warm it bogs out and loses pressure, anyone have any idea what it could be? I have 5 kids and no other vehicle to transport them in and Ford camt get to diagnose it now for almost a month.