r/MechanicAdvice • u/Stock-Status-8466 • 1h ago

Help

Ok so I am coming on here because I have a problem. My Knock Retard is going up to an 8.5 under about 50% throttle; I cannot figure out why. I drive a 2019 Accord 2.0T. It was on a off the shelf Ktuner tune, then I noticed the Knock Value so I set it back to stock, any ideas on what it could be, I doubt its the tune because I set it back to factory calibration and the Knock Retard still went up. Spark plugs look fine but look to be running a bit hot. Any input is appreciated

2 Upvotes

100% Upvoted

4 comments sorted by

1

u/AutoModerator 1h ago
Moderator Announcement Read More »

1

u/MaterialBoldness89 1h ago

running that much knock retard even on the stock tune is sketchy. what fuel are you putting in it? the 2.0t really doesnt like anything below 91 and even bad gas can cause spikes like that

plugs looking hot points toward it running lean or timing being pulled too late. any weird smells from the exhaust? could be a vacuum leak or maf sensor acting up

id log fuel trims and afr if you can. stock tune shouldn't be pulling 8+ degrees unless something is seriously off

1

u/dildobagginss 1h ago

What cars have you done timing jobs on?

0

u/Stock-Status-8466 1h ago

I am running 93 octane, it's pulling timing even on the stock ECU calibration, so I am wondering if it is carbon buildup or something of that nature from the spark plugs running too hot