Bmw rough idle on startup May 16, 2023 · Hey all, the symptoms are mildly rough idle/misfire when starting up from a warm engine for about 10 seconds. BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N55 Turbo Engine / Drivetrain / Exhaust Modifications > 2014 f30 N55 cold start problem Google Search Search Forums Apr 6, 2025 · " Easiest thing to check: trash in the idle jet. This sensor signals the car’s computer when the engine’s coolant is cold or hot, so the computer delivers more or less fuel to the engine. Mar 16, 2022 · New Genuine BMW camshaft sensors New Genuine BMW crank sensor New Bosch low pressure fuel sensor Walnut blasted intake valves All new fluids: BMW Coolant, Liquimoly Molygen 5W-40 + Genuine BMW Oil Filter Previous mods: BMS OCC VRSF 5" intercooler N54 Tuning cat-less down pipes New Genuine BMW rocker cover and gasket (at ~75000 mi) Apr 28, 2017 · HI BMW e90 / 330i model 2010 , European version Car on cold start has rough idle for some seconds before RPM goes back to stable mode, also car has hesitation on low RPM , or on acceleration I cleaned the throttle body, changed plugs, tested coils, no solution so thought to disconnect MAF Feb 26, 2024 · This is the last option after I tried everything, but I couldn't find the issue. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm Dec 17, 2008 · Anyways I have yet to completely solve my rough idle on cold start up. " yep, happened to me when I drove my first 2002 home about 25 years ago. It's only after starting, in the first minute or so. I bought it second hand from a BMW dealer with a full service history and it is around 30k miles. Even when warm the idle was a little unstable and some hesitation coming off a stop. You also need to keep your intake system clean. heu avscx qxsfqp azvngk swc bmmj myjl wqxwd pkxw rvhut