How can i fix my volvo 850 1993?

hi there,

first you need to determine if you have spark present from the spark plug(leave all spark plugs in engine,remove one lead and use another spark in removed lead get someone to turn the engine over for you and hold plug up against engine using insulated pliers and see if it sparks) if it does you know the ignition system is ok.Then you need to check for fuel(to the right of the fuel injection rail you will find a metal tyre valve cap (you may have to remove the black cover on the throttle housing to gain access) remove the cap place a rag beneath this and with the ignition on push the valve in for a second and fuel should spray out if it does then the fuel system is ok.This model is renowned for just losing compression so if the checks are all ok, you just remove and clean all spark plugs and refit dissconnect the injectors turn engine over for twenty seconds reconnect the injectors and keep turning over and eventally it will start (a booster pack or jump leads may help) if it doesnt start and your sure you have fuel and spark the wait 30 mins for starter motor to cool down and repeat process again

jack
February 2008