[Blkjag09]

Hey everyone...
Thank you for taking the time to read this.
This just started happening when I start the car in the morning after sitting all night. Car has 74k on it and never had this issue before.
Starts up fine (rpm goes to 1600) but after a few seconds rpms dip( goes down to 500-600) and the car feels like it's going to stall, but immediately goes back up and normalizes and doesn't happen again all day.
I have spoken to multiple bmw technicians and they all say "it's normal" I have read multiple ppl saying they had the same experience.
This does not seem normal since it has never happened in the 74k that this car has been driven.
Once again, thank you for your time

[FastF30]

Originally Posted by Blkjag09

Hey everyone...
Thank you for taking the time to read this.
This just started happening when I start the car in the morning after sitting all night. Car has 74k on it and never had this issue before.
Starts up fine (rpm goes to 1600) but after a few seconds rpms dip( goes down to 500-600) and the car feels like it's going to stall, but immediately goes back up and normalizes and doesn't happen again all day.
I have spoken to multiple bmw technicians and they all say "it's normal" I have read multiple ppl saying they had the same experience.
This does not seem normal since it has never happened in the 74k that this car has been driven.
Once again, thank you for your time

Mine does that on the stock tune.... I drive it once or twice a week and yes on the initial warm up.. 43,500... After MHD it doesn't do it...

[thejeremyman9]

Originally Posted by Blkjag09

Hey everyone...
Thank you for taking the time to read this.
This just started happening when I start the car in the morning after sitting all night. Car has 74k on it and never had this issue before.
Starts up fine (rpm goes to 1600) but after a few seconds rpms dip( goes down to 500-600) and the car feels like it's going to stall, but immediately goes back up and normalizes and doesn't happen again all day.
I have spoken to multiple bmw technicians and they all say "it's normal" I have read multiple ppl saying they had the same experience.
This does not seem normal since it has never happened in the 74k that this car has been driven.
Once again, thank you for your time

Take a video and post it. Also let us know of any mods.

[harkes]

I bet you have a leak on your PCV tube or turbo inlet. Both broke on my car causing cold start issues and problems with WGDC (PWG car).

[2014F32435iMsport]

My 14 f32 was doing this, BMW dealership by me said it was something about a software update. Once they updated it the problem was fixed.

[Blkjag09]

Originally Posted by FastF30

Mine does that on the stock tune.... I drive it once or twice a week and yes on the initial warm up.. 43,500... After MHD it doesn't do it...

Hey... so I have the mppk and exhaust.. but that's from the factory.. what is MHD?

[Blkjag09]

Originally Posted by thejeremyman9

Take a video and post it. Also let us know of any mods.

I have a video but I'm new to this and it's only allowing me to upload pictures for some reason

[thejeremyman9]

Originally Posted by Blkjag09

Hey... so I have the mppk and exhaust.. but that's from the factory.. what is MHD?

MHD is an aftermarket tuning platform like BM3. Having said that you shouldnt need to get a tune to solve a cold start problem.

Originally Posted by Blkjag09

I have a video but I'm new to this and it's only allowing me to upload pictures for some reason

You will need to upload it to youtube or another video sharing platform. Youtube/google videos is free and easy with a gmail account. Upload then just post the link here, and make sure the video is public.

[Blkjag09]

Originally Posted by harkes

I bet you have a leak on your PCV tube or turbo inlet. Both broke on my car causing cold start issues and problems with WGDC (PWG car).

I will definitely have my friend at bmw take a look at those and see if those parts are ok..
I know the car has been updated to the most recent software/firmware.. mayb the adaptation needs to be relearned since the update has been installed?

[Blkjag09]

Originally Posted by thejeremyman9

MHD is an aftermarket tuning platform like BM3. Having said that you shouldnt need to get a tune to solve a cold start problem.

You will need to upload it to youtube or another video sharing platform. Youtube/google videos is free and easy with a gmail account. Upload then just post the link here, and make sure the video is public.

Thank you!! I uploaded the video to YouTube..[IMG]

[/IMG]

[thejeremyman9]

So is the car completely stock? And do you have any codes or a way to scan for them?

Also, did you touch the gas during that time or did it raise back over 1500 all on its own?

[Blkjag09]

[Blkjag09]

Originally Posted by thejeremyman9

So is the car completely stock? And do you have any codes or a way to scan for them?

Also, did you touch the gas during that time or did it raise back over 1500 all on its own?

Car is bone stock besides for mppk and I did not touch anything besides for brake pedal and start button, no codes or anything...

[SlumpLord3000]

Happened to me when my charge pipe broke on my stock car.

Also happened after I got no cat downpipe. Flashing the car with no cat heating fixed it.

I'd say check your O2 sensor and/or plugs.

[thejeremyman9]

Originally Posted by Blkjag09

Car is bone stock besides for mppk and I did not touch anything besides for brake pedal and start button, no codes or anything...

As you can see from the other responses, it can be a variety of different things. If there are no other symptoms while driving, and no codes, i wouldn't worry too much about it but keep an eye on things.

At the same time, i would give everything a good visual inspection. With the car cold, pull the engine cover and check your CP (feel around for loose connections, etc), check your inlet/intake, MAF, airbox, O2 sensor plugs/wires, etc. If nothing looks/feels wrong, and you have no codes or other symptoms, there isn't much to go on. So you either throw parts at the car or monitor how things change over time.

[Blkjag09]

Originally Posted by thejeremyman9

As you can see from the other responses, it can be a variety of different things. If there are no other symptoms while driving, and no codes, i wouldn't worry too much about it but keep an eye on things.

At the same time, i would give everything a good visual inspection. With the car cold, pull the engine cover and check your CP (feel around for loose connections, etc), check your inlet/intake, MAF, airbox, O2 sensor plugs/wires, etc. If nothing looks/feels wrong, and you have no codes or other symptoms, there isn't much to go on. So you either throw parts at the car or monitor how things change over time.

Thank you.. I will take a look at all that today and hopefully find something that would make sense..

[FastF30]

Yea... mine wasn't like that... Well just for chits and giggles here is a video cold start after sitting for the last 5 days on MHD 2+ 95map, FabSpeed Dp I just did...

[TK335iMSPT]

This could be a variety of issues, as stated above. I had this exact problem a few moths ago. My RPM's would drop down and the car would overcompensate and they would shoot up. Only happened on cold starts. Dealer replaced my MAF sensor and advised me to be cautious using oiled after market intakes, as they can damage the sensor over time. I now run the stock intake with the AFE pro dry drop in filter.

[Tpriest7893]

I had a rough cold start and once I changed my spark plugs it's been much better since. My car has 88k miles and I changed at about 80k and bought my car with 45k and believe they were on stock plugs when I did. This was my first bmw so I myself was learning a ton along the way

[DrivenByE30]

Originally Posted by Blkjag09

Hey everyone...
Thank you for taking the time to read this.
This just started happening when I start the car in the morning after sitting all night. Car has 74k on it and never had this issue before.
Starts up fine (rpm goes to 1600) but after a few seconds rpms dip( goes down to 500-600) and the car feels like it's going to stall, but immediately goes back up and normalizes and doesn't happen again all day.
I have spoken to multiple bmw technicians and they all say "it's normal" I have read multiple ppl saying they had the same experience.
This does not seem normal since it has never happened in the 74k that this car has been driven.
Once again, thank you for your time

Originally Posted by harkes

I bet you have a leak on your PCV tube or turbo inlet. Both broke on my car causing cold start issues and problems with WGDC (PWG car).

I looks to me that the PCV cap at the top of your engine is failing and need to be replaced.

[JaredG_F30]

when is the last time you changed the spark plugs? When ever my car starts to do this fresh plugs always clears it up.

[bqik]

it happened to me last year.

Dealer had no idea why this was happening, so after reading some posts about the issue I asked the dealer for a plugs replacement, they did it and the rpm drop disappeared during cold starts. it s been 1 year without rpm drops.

knock on wood.