If the pump is faulty there will be a ‘Low fuel pressure dilute the engine oil with diesel. Leaking injector washers can be the cause of some of the following symptoms. Hard or difficult starting, erratic or uneven idle speed, lumpy running, … Access Content SW 60 Vacuum Pump Oil –...
Because the PCV valve controls the flow of blow-by vapors from the crankcase to the intake manifold, a faulty or broken PCV valve can manifest itself in the same way as an intake air leak. A bad PCV valve can cause the idle RPM to get too high and unusual idle behaviors like very ro...
If the engine runs hot at low speeds or at stops I would be suspect of a faulty radiator cooling fan motor which is not coming on. OR, there is an air bubble in the cooling system that needs to be bled out. If you did not have this overheating issue before the radiator hose replace...