Engine is stumbling / rough idle at startup
#1
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My Ride: 2008 535i LCI with sports/premium package, Sports trans with paddle shifters, CF emblems, JB4 Software, Dinan Exhaust, Navigation, M5Tech body kit, Carbon wrap interrior trim and CIC Controller.
Engine is stumbling / rough idle at startup
I've been experiencing an annoying problem over the past two months and it seems to be getting worse. When I start the car all seems ok until I put it in reverse or drive. Then I hear what sounds like a misfire, stumbling RPM is a little unstable and rough idle. During this time when I drive a way it feels more like a misfiring situation. The problem totally goes away after 1-3 minutes. This situation is there when the car has sat for several hours and is cold. I looked for codes with INPA and found nothing except a few idrive monitor and chatter codes. Nothing engine or fuel related. I have the JB4 and it's been turned off for a few days and no change noticed. Plugs were changed at 50k and car has now 86k. Things I'm thinking about are replacing plugs, maybe coil(s) not sure if there is a way to isolate to one if there is a problem. Fuel injection cleaning. I will also consider but will clearly do if its gets worse the carbon removal from the direct injection. Any thoughts?
#2
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Also 2008 LCI 535xi. I've experienced misfiring from cold starts but to a much lesser degree. Feels like you run over something like a 2x4 when you're creeping out of the garage.
Sometimes pulling away after a start it feels like the transmission is hunting around for gears too.
Goes away very quickly so I'll just be keeping my eye on it.
Sometimes pulling away after a start it feels like the transmission is hunting around for gears too.
Goes away very quickly so I'll just be keeping my eye on it.
#3
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My Ride: Alpine E60, '09 535i-Premium, Sport and Comfort Access PackageMods: Lux H8 V3 Angel Eyes, Weisslicht LED license plate lights, Interior LED lights, RPI Scoop, Matte Black Grills, Smoked LED side markers & side reflectors, 35% tint all around, and a 3
I've been experiencing an annoying problem over the past two months and it seems to be getting worse. When I start the car all seems ok until I put it in reverse or drive. Then I hear what sounds like a misfire, stumbling RPM is a little unstable and rough idle. During this time when I drive a way it feels more like a misfiring situation. The problem totally goes away after 1-3 minutes. This situation is there when the car has sat for several hours and is cold. I looked for codes with INPA and found nothing except a few idrive monitor and chatter codes. Nothing engine or fuel related. I have the JB4 and it's been turned off for a few days and no change noticed. Plugs were changed at 50k and car has now 86k. Things I'm thinking about are replacing plugs, maybe coil(s) not sure if there is a way to isolate to one if there is a problem. Fuel injection cleaning. I will also consider but will clearly do if its gets worse the carbon removal from the direct injection. Any thoughts?
#4
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My Ride: e60 535xi Prem. Package
Model Year: 2008 535xi
I am having the exact same problem with my 08 535xi again. The 1st time I got a check engine light and it was a misfire in cyl 5 & 6. My dealership changed all spark plugs and 1 coil. That worked for about 2 weeks lol. Now I am feeling the same $hit again, but this time i have had 2 long start cranks so maybe my HPFP is going....who knows
#5
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Booyaazaa - Everything seems normal except for the rough idle part when started. It also starts normal as always. The rough idle actually get worse or feels worse when car is placed in drive or reverse and you hold the brake. If you release the brake and slowly depart its the same, if you increase the speed it seems ok and after a couple minutes max, its back no normal. I was thinking something with the cold start system, but it was only a thought.
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My Ride: 2008 535i LCI with sports/premium package, Sports trans with paddle shifters, CF emblems, JB4 Software, Dinan Exhaust, Navigation, M5Tech body kit, Carbon wrap interrior trim and CIC Controller.
The ac on or off or pumping the brakes doesn't change the rough idle. Ill try it again in the morning.
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My Ride: 2004 530i 6-speed
How about pulling a plug wire at a time.. when one is unplugged the idle should drop.. if there is no difference in pulling off a plug wire - cylinder is dead - plug wire bad, coil pack, sparkplug, etc..
#10
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My Ride: 2008 535i LCI with sports/premium package, Sports trans with paddle shifters, CF emblems, JB4 Software, Dinan Exhaust, Navigation, M5Tech body kit, Carbon wrap interrior trim and CIC Controller.
Mike, I have not pulled any wires yet. I did try it with AC on/off and pumping brakes 5 times. Ths didn't change anything. If I let it idle it takes 1.5 - 2 minutes and its perfectly normal. Very Strange!