6.0L Vehicle owners suffer the most from the first start-up. These problems are almost always caused by a leak in the high-pressure oil system that operates the engines fuel injectors. Possible leak areas include high pressure oil pump IPR Valve STC connection branch pipes standpipes blind bands oil lubricated ball-o-rings injector inlet gaskets etc. If the leak or combination of leak sources is bad enough, the forklift will not start. Under any circumstances - hot or cold - to prevent the system from producing the required 520 PSI, it is not easy to find the exact source of the Leak(s). To solve your problem, we offer you a product that is both high quality and super priced. When using our product, please comply with the safety rules, wear glasses and do not work in high-pressure working environments without checking that the fasteners are connected correctly.