Need Opinions: Cylinder 5 Misfire After Pull, Where Would You Start?
Hi everyone,
Yesterday evening, just before I got home, I decided to do one more full-throttle pull from 0 km/h in my R35 GT-R. During a gear change near redline, I immediately noticed when getting back on the throttle that the engine was no longer making full power. It felt like the car was not running on all cylinders.
I pulled over and tried restarting the car, but the problem remained. Since I was only about a kilometer from home, I drove back very gently.
Once home, I connected my diagnostic tool and found fault code P0305 – Cylinder 5 Misfire.
Based on your experience, what do you think is the most likely cause? Should I be worried about worst-case scenarios right away, such as a damaged piston, melted piston, etc., or are ignition coil and spark plug failures relatively common on the GT-R?
It was already late last night, so I didn't have time to investigate further. My plan this weekend is to start with the simple things: swap the ignition coil from cylinder 5 with another cylinder and see if the misfire follows the coil. If it doesn't, I'll replace or swap the spark plug next and continue diagnosing from there.
Has anyone experienced something similar with their R35? Any advice would be appreciated.
Thanks!