P0300 Code Misfire On All Cylinders

[Scug_]

Hey guys been having this issue since April 2023, Drive a 2016 Audi S3 77K kilometres base bolt on mods plus IE Stage 2 tune and IE transmission tune. Did all the service on the car. Replaced sparks plugs in march for RS7 spark plugs (as they fit) replaced the ignition coil pack as well, changed them for the ECS ignition coil pack. I am dumbfounded with what the the issue is.

Whenever I clear the code on the car the engine light turns on maybe 1.5 weeks later with the same code (p0300). when I fuel the car, I always over fuel the car i don’t stop on the initial click. When I fuelled it up this week, I over filled it like usual and noticed some gas drip from underneath by the passenger side tire, which was odd.

Was hoping you guys could come and rescue my problem I’ve been having recently.

Cheers,
Josh


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[WeldLife88]

Don't fill past the click! What's likely happening is your overfilling your gas tank, causing the charcoal canister to become flooded. Any correlation between clearing the CEL, getting gas and it coming back 1.5 weeks later? Do a quick search through this forum and you'll find posts authored by some intelligent people regarding similar topics.

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[o1turbo30v]

step 1, remove IE tune, its garbage
step 2, install OE NGK, stock heat range plugs and OE coilpacks, all the APR/034/ECS coil packs are also junk, lots of people with phantom misfires with those

[Scug_]

step 1, remove IE tune, its garbage
step 2, install OE NGK, stock heat range plugs and OE coilpacks, all the APR/034/ECS coil packs are also junk, lots of people with phantom misfires with those

Thanks for your insight


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[Scug_]

Don't fill past the click! What's likely happening is your overfilling your gas tank, causing the charcoal canister to become flooded. Any correlation between clearing the CEL, getting gas and it coming back 1.5 weeks later? Do a quick search through this forum and you'll find posts authored by some intelligent people regarding similar topics.

Sent from my Pixel 7 using Audizine Forum mobile app

Yea thanks for your help. I’ve read about that thread in audizine forum. I haven’t noticed any correlation when i clear the CEL and getting gas yet. I just filled my tank yesterday, but usually it’s about every 3 weeks it comes on. But I’m not gonna fill past the click like you said. Hope this is the case


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