From your observations with logs, does the mishimoto intake throw off the fuel trims on the completely factory tune?Vehicle: 2018 Civic Si Coupe
Total tuned time: 19 months
Total tuned mileage: 24,000+ miles
Tuning device(s) used: Hondata
Tunes used: Hondata +6, +9, my own custom mapping
Additional engine mods: Mishimoto SRI
Clutch: Stock and never slipped
Problems/issues: none until very recently. Emissions issue coding for cylinder imbalances. Also gauge cluster going black and coming back on "piece by piece". Returning car to stock except the intake has made huge difference with gauge cluster (went from off and on 4 times a drive cycle of 30 minutes- to - has only happened twice in the past 2 weeks.... almost like it's recovering from something....).
It unfortunately hasn't helped the emissions code. Either my injectors are in early stages of failure, it needs plugs, cat is partially melted, 02 sensor damaged, or a combination of all the above. Haven't had it looked at yet.
Making the personal choice to never use a flash device on these cars again.
Hoping to get it fixed and trade for a '20 si coupe and planning to leave as stock as possible. Maybe an R.
Driving style: Slightly speedy with aggressive bursts from time to time.