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Robert, UK Qualified Car Technician
Category: Nissan
Satisfied Customers: 4716
Experience:  self employed in the motor repair buisness 19years
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Misfire on cylinder diagnostic code. Local garage has

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Misfire on cylinder diagnostic code. Local garage has variously replaced all the coils. What is a more likely cause?


What fault codes did they get prior to replacing the coils?

Customer: replied 1 year ago.
I can only guess at P0300?


That code is a random multiple missfire..but not a code that detects a single cylinder at that case in my opinion really you shouldnt of had to have all coils to be the chances of all 4 coils going is pretty rare...You need to know if the timing is spot on crank and cam coleration..incase this is chain stretch..they could measure timing chain tensioner protrusion to see if its within spec..if a rattle is heard from cold start from within the timing cover then that could be your problem..also they need to look at the fuel trims / also check for intake leaks / oxygens sensor readings...

Customer: replied 1 year ago.
This was useful. It more or less confirmed my own research on the subject. thanks.

No problem...please dont forget to leave a rating for me..many thanks

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