Hello Have a Volvo 850 bj 96 , 20 . 126 hp engine runs only on 4 cylinders and has the injection nozzles clamped gradually and notice that on the 4th cylinder does nothing , , ignition is ok ignition spark is there it can also be the injection nozzle ? and if yes how do I get this removed and then installed again overings when I speedy runs the 4 cylinders again sets with but again from control lamp Ladder probe lights ??? who can give me tips thanks i n forward lg Swedes steel