misfiring on idle cylinder 4

[jakescicluna]

HI, my 2013 sv6 ve is misfiring in the 4th cylinder. Only at idle, under load even the slightest amount it runs smoothly, I've swapped over sparks, and coils and attempted at an injector clean, any thoughts on what could be causing the issue? Wondering if low compression could cause idle misfires but I'd assume it would misfire underload, very much could be wrong.

Thanks

 

[krusing]

Possibly be a failed Injector, physically faulty or blocked, pull them all out and mark them accordingly,
and check the baskets, and the resistance, they should be be approx. 15ohms resistance.

I recently purchased a new set, received them last week,
and one failed with 15 minutes of a road test, so anything is possible.

 

[krusing]

Side note : Have you had it scanned to confirm its Cyl 4 ?, as the ECU will record a DTC for a misfire.

 

[jakescicluna]

Side note : Have you had it scanned to confirm its Cyl 4 ?, as the ECU will record a DTC for a misfire.

yeah scanner showed it, seemed that cleaning the injector fixed it but who knows given it a drive it ran fine and idled without misfires. cheers tho