Re: Volvo 4.3GL Run on, run on, run on
Its lovingly referred to as dieseling, fuel is ignited by a hot combustion chamber, not the spark plugs.<br /><br />The problem is always heat related. Could be caused by wrong plugs, idling to high, wrong timing, coolant overheating, high underbonnet temps, carbon build up, fuel octane ratings can sometimes be an issue......the list goes on. <br /><br />Letting the motor idle a bit longer before shutting down allows the combustion chamber to to cool down (ever owned a turbo). Reducing the idle speed may fix the symtoms but not the cause.<br /><br />First step: Do a regular tune using correct plugs. Check cooling temps. <br /><br />Aldo