Norwegian_z

My 350z says its missfire ( blinking engine light)

To fix this i have changed
-z1 coils on all 6 cylinders
-ngk sparkplugs on all 6 cylinders
- bosh knock sensor
-z1 bank sensors ( bank1 and 2)
-presure tested all cylinders.


it is still getting missfire when the engine gets resistance and i am out of ideas on what it can be.

Has anyone any suggestions to what it can be?

thanks in advance

Timboj

I'm no expert on electrical, but maybe start by checking all of your ground-wire locations. Otherwise it may be an issue with the harness that you need to trace. You could always check the wiring for continuity with a multimeter (ECU and coil connector).

DarkZ03

iTrader: (11)

Make sure the coils are plugged in properly, easy to get the driver side bank mixed up.

kakaboy

Have you checked codes?

Norwegian_z

The only code i get is that one or more cylinders are misfireing

the code is: P0300

kakaboy

Maybe check injectors?

Norwegian_z

I cleaned the injectors but i have bought new ones and also new map sensor and o2 sensor for both upstream and downstream

DarkZ03

iTrader: (11)

I'm gonna say it again, make sure the coils on the left side are plugged into the right connector, it is possible to mix up and it will misfire.

Norwegian_z

im sorry for not answering you but i checked the coils yesterday and it must be right because i cant put them on another without make it stretch in a way it dont look natural

kakaboy

I agree with Dark. I also had left bank misfire issue and it was the connectors. The last connector does not go to the last coil as it would seem. I made this mistake too. The last connector goes to coil 4

Norwegian_z

the way my coil on left bank is set up is( seen from the front of the car) first connectror to first cylinder, second connector to third cylinder and last connector to the cylinder in the middel

DarkZ03

iTrader: (11)

That should be correct then I believe, mine isn't exactly routed like stock but that sounds right.

kakaboy

thats the right orientation

i8acobra

iTrader: (6)

Plugged cats. Common Nissan issue.

Norwegian_z

but that would not affect to a missfire? Just loss in power?🧐

joelle king

I had a similar issue in the past and turned out that my injectors are not performing well

Norwegian_z

yes i hope im getting the new injectors next week. If that not work i also have 02 sensors and new grain pipes. AND IF THATS NOT WORKING IM CRASHING THE **** IN A WALL

i8acobra

iTrader: (6)

Yes, it can cause a misfire.