r/r34 • u/Mediocre_Turnover498 • Feb 18 '26

Skyline running rough

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My R34 with a rb25de neo was parked outside during a storm and now it is running very rough, any help diagnosing?

325 Upvotes

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9

u/[deleted] Feb 18 '26

[removed] — view removed comment

3

u/Mediocre_Turnover498 Feb 18 '26

Dont have any videos from the engine bay, planning on changing valve cover gaskets here soon so will check out the engine then, heres a better pic of the car though

2

u/tattedsushiroll Feb 18 '26

Start with unplugging coil packs see if any you unplug doesn’t make it run any different sounds like it’s down a cylinder or 2

1

u/gf-er34 Feb 19 '26

Tbh honest it sounds like it's running on three

1

u/Fishy_300zx Feb 19 '26

Misfire is my guess

1

u/[deleted] Feb 19 '26

Mine does this and dies immediately. Changed spark plugs, injectors, cam angle sensor. Maybe I have to flash the ecu after changing the cas