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1997 Mercedes-Benz E320 Question: my E 320 have a misfire code p300 and p305 andp306



boyse, Lithonia, GA, March 11, 2013, 21:59

so i unplug the injector # 1 pluge in the noide light and
start the engine the light did not come on but when i try # 2 the same way i did # 1 the light flash on then off the shop technician say i could be the cumputer is bad does any
no the answer to this it been a pain i also had mercedes scan tool and it do not know what cause misfire 5 and 6 ?

2 Answers
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  • Answer #1

    March 12, 2013, 02:12

    if ignition lines are good and the spark plugs are good, check fuse panel. computers don't make mistakes. people do. may need to be reprogrammed if any serious modifications have been made to intake or exhaust.

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  • Reply

    boyse, March 12, 2013, 22:16

    I have check fuse near computerfive fuse plus a large fuse all good i just want to know mercedes scan tool can or should detect a bad computer because the technician say the computer is good but when i disconnect the fuel
    injector connector and plug in the noide light in # 1 it did not light up when i start the car is tell you that
    the computer is bad i do know tell me.? no modifications have made to intake or exhaust.

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  • Answer #2

    June 19, 2014, 22:49

    replace the left (driver) side catalytic converters

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