Bmw n55 rough start Previously had E39 525i and E60 525i but both of them had smooth idle. 4) Plug MAF back in while car is off. Hello friends *Update* 2013 335i M/T 1. The engine starts just fine, then about a second or 2 later, the RPM's drop to the point where the engine almost stalls out, then it rebounds and the RPM's jump up to around 1500 then it levels out around 1k as Jun 29, 2014 · The rough idle only happens on very first start up of the day. I went back to stock map and the car was driving normal, but on start up it still rough, my needle doesn’t bounce but u can hear and feel it. Weird thing is that it's an intermittent issue and happens randomly. Recently i have come across a extremely rough idle and weird bogging and stuttering while driving i also noticed after a cold start my rpms dip hard and the car begins to run extremely rough i will link a video of this happening below. Join Date: Feb 2022. com/GeorgeA Jul 17, 2024 · 2015 F15 X5 N55 Cold Start Stall issue A few months ago I started to notice a slight stutter when cold starting in the morning. and that takes about 15-25 seconds. BMW Forums - Top. Then, occasionally, the Jul 28, 2021 · Since we are dealing with a BMW rough idle on startup, we will start our test at the intake muffler (air filter housing) and work our way downstream towards the cylinder head. It can be not bad some mornings and then on other it shakes the car. (Before the oil change, sometimes it could take a 2-3 seconds to start, now it starts in less than a second) Aug 8, 2021 · I provided two sets of logs. I went back to stage 2+ and it’s still doing it. I changed clutch kit with LUK 2. Remove the intake muffler and disconnect the mass air flow sensor so a rubber cone adapter can be inserted inside the intake boot. Mar 25, 2023 · I'm looking for some help to solve a rough idle issue I've had for a long time. com/watch?v=vlfTE31VlOwPatreon: https://www. May 16, 2023 · N55 rough idle/misfire at warm startup I know this isn't an F15 subforum but I think there's more activity here then the f15 side but it's the same engine. I will try to describe the problem better. But once it's warm the car run fine. BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N55 Turbo Engine / Drivetrain / Exhaust Modifications > N55 cold-start issue Google Search Search Forums BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i) > Technical / Specific Topics > 135i Turbo Engine (N54 / N55), Exhaust and Drivetrain Modifications: Missing\rough idle at cold start BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N55 Turbo Engine / Drivetrain / Exhaust Modifications > Rough/shaky start up Google Search Search Forums Nov 2, 2015 · I just picked up a 2013 328i xDrive F30 with the N20. this can last about twenty seconds or so before the idle finally becomes smooth again. Hope no repair in future. when you turn on the car regardless if its cold start or not, the RPM will be above 1k for sure. Reconnect the MAF sensor and see if it remedied the issue on the next cold start. Is anyone else having this issue with the n55 engine? May 29, 2019 · I own a 2011 BMW 335i e92 6mt with N55 engine currently running Jb4 and MHD BEF. Powered by vBulletin® Version 3. Then shut the engine off. (Jan 3rd 2013) Now my car no longer idles rough even when it's a cold start and starts a lot faster. Temperature in mornings is around 70F or 20 C. Oct 14, 2021 · BMW M235i (N55) Cold Start Issue. It been doing this for a few months. E81 / E82 / E87 The BMW rough idle is now finally solved!UPDATE: Rough Idle is NOW FIXED: https://www. Sent it to my mechanic and he found that my vrsf chargepipe had blown through a bolt on the bottom, which plugs a hole I believe is designed for another add-on. idle is rough for the first two minutes, you cannot drive it if you are MT. 1. Aug 30, 2012 · However, if I drive it say to work, and then I drive it around noon, when I start it, the idle will be up and down between 600 and 1300 RPM. F40Model Year: 2019 + Previous Generations; F20 / F21Model Year: 2012 - 2018. Sure, there are other things that can cause these issues, but testing the Vanos takes 30 seconds. They put a washer and bolt on that to close the opening and haven't had the idle issue since. When I took it to a local mechanic he said it's the high pressure fuel pump that's gone bad Dec 20, 2012 · Update: After a couple months with rough idle every cold start i decided to do an oil change 2 months ago. Details on the car: Early F10 N55 with rotary n54 style HPFP; Only mod is VRSF Catless downpipe and OEM M5 Mufflers; Coils/plugs/injectors are relatively new (OEM BMW parts) Stage 2 MHD 91 Octane tune at the moment; In the attached log you can see the following Jan 2, 2018 · N55 Misfires Cold Start. Mar 5, 2012 · Memberships: BMW CCA, Peachstate PCA, NMA, AAA, RAC Sold: 2015 Jaguar F-Type R 2014 BMW M5 Individual Dinan Stage 1 2013 BMW M5 Individual 2012 BMW 550i Dinan Stage 2 2004 BMW M3 2001 BMW 330Ci 1997 BMW 328Ci 1994 BMW 325Ci Feb 22, 2023 · 2) Start the car with MAF sensor unplugged (OP stated: "Right here my car started up without the rpm dip for the first time in weeks") 3) Let car idle for a few minutes and then shut car off with MAF still unplugged. If it's really cold it even stalls. Occasionally on a cold start if I immediately (within 10 sec) put the car in drive and start to drive away the car will stutter and almost stall out. 2Addicts | BMW 2-Series forum Technical Topics N55 (M235i) Engine, Transmission, Exhaust, Tuning Cold start issues - resolved - injectors replaced Google Search Search Forums. when attempting to drive my car after a cold start the car stalls extremely Aug 4, 2023 · I just did a full service with plugs, coils, injectors, did my transfer case fluid, diff and it’s still doing it. I figured I’d mention it as it could have been a cheap fix other than inconvenience of the trip to the dealer for the ISTA-P/ISTA4 update. I have also read that rough idle on start up is common on these cars. OP then stated "Every start up since doing this has been perfect and my issue has not Let it run at idle for a few minutes. Hey all, the symptoms are mildly rough idle/misfire when starting up from a warm engine for about 10 seconds. Hi! New to the forums here. What happens is your radiator, and intercoolers shut down when the car is off so it needs to warm up when you turn the car on. Currently, I have done the following maintenance items in the last 6,000 miles. One thing that is bothering me is the intermittent rough idle this N55 engine has but nothing visible on the RPM indicator. Apr 25, 2016 · Hi guys, Few days ago I purchased a 2011 535i CPO, M-Sport. The second set of logs at 18:55 is after the car was warmed up and sitting for about an hour and half, I started logging before the car started shaking and auto revving at 18:55. Location: Maryland. I called the local BMW dealer and Jun 22, 2021 · You were hunting around for answers and I’m aware of an issue with N55 cold start rough running/stalling/idle dip related to software of the DME. F40Model Year: 2019 Drives: 2016 BMW X3 xDrive 35i M Sport. Today the engine light came on. At the beginning I notice a terrible clicking/ binding noise coming from the engine bay when I lock/unlock the car. Apr 22, 2016 · When an inline 6 BMW comes to me with a rough idle and stalling on cold starts the first thing I do is unplug the intake Vanos solenoid and start the car cold. The N55 in my 2014 435i starts misfiring and shaking a little bit upon startup, doesn't matter if its a cold start or if car is already warm. After a bit more research on this forum and the F-series 3/4 series forum, it appears that this particular issue of nearly stalling on a stone cold start tends to effect N55 6MT cars that have the Oct 27, 2020 · I've been having this issue where my 2011 bmw 335 e90 (n55) idles kinda roughs during cold start. Sep 12, 2019 · Friend's 2011 X5 E70, 60000 miles, has the following issue. patreon. New Elder ignition coils, new Bosch plugs and a new Valve Cover. It raises and lowers the idle rhythmically about every second or so. The first set with start time of 16:42 is when I started logging right after cold start and driving around. May 12, 2021 · I have a 2011 e90 n55 mhd stage 1+ and had a rough idle with car dying randomly. youtube. Carly logs are little weird. Any suggestion? " Now here is the full story of my repair so far. 8. Oct 5, 2011 · i have a N55 MT coupe with every single add on possible. After the first start the rest of the day is fine. Once the car has ran for 30 to 45 seconds everything smooths out and the misfire doesn't seem to return. 11 N55 misfire on warm start. 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 Ok, like the title says, I haves 2011 535i N55 and a rough idle that only occurs on Cold start. On every cold start, Instantly when I shift 1gear and starting move, its shaking front and back, As I hit gas pedal, it doing misfire, its like making me hit a steering wheel, sorry for my English I cant describe it better. Bimmerpost ☰ Model Selection. Idle jumps up to 1500 and down to 1000. mncbzk qtjl lbofb xxa woe ljyg muka izof tjkh hllpv xnvpet lstcur uvrvp muxumyk adkxe