Nissan Sentra 2008 P0300

Hey guys
Am having P0300 misfire code
Cylinder 1 and 4 is misfiring
Misfruing counter gave me that information and I checked its not firing when coil is removed and Crank to check spark but 2 and 3 is having spark.

Please can anyone help me probe this ?

Also can I get fsm or wiring diagram for the coil plug so I can check for continuity and wiring integrity

Thanks

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Swapped coils and even the spark plugs of the working cylinder 2 &3 to the non working 1 &4

Misfires didn't move

Is not a compression issue BTW because crank outside the hole of the spark plug is not even sparking light/ fire in 1&4

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www.nicoclub.com/nissan-service-manuals



It's a 3 wire coil - power, ground and control wire (0-5v pulses on scope). The control wire will be the color that's unique to all the coils. Run a headlight bulb across the power and ground to check power and ground. Check control wire for a signal with a meter you should get some voltage fluctuations like 0-.3v on a multimeter while engine's idling. 0v could be open, short, poor connection, maybe jump the control wire from a firing coil into the dead coil's control wire and see if it'll fire then. dunno where computer lives so do as much as you can at the coil.

Thats great

Will look into it

Thanks

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Hello

Have discovered some loose pins in the female socket to the pcm as attached picture.

Is there a way to dismantle this and retighthen the pins and fix it back together?

A video or manual ?



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Hello

Have discovered some loose pins in the female socket to the pcm as attached picture.

Is there a way to dismantle this and retighthen the pins and fix it back together?

A video or manual ?



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Fixed

Replaced PCM /ECM

Thanks everyone

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