F30POST
F30POST
2012-2015 BMW 3-Series and 4-Series Forum
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N20, N26, B46, B48 Turbo Engine / Drivetrain / Exhaust Modifications > Injen Intake Makes car bounce at idle?? Why
GetBMWParts
Post Reply
 
Thread Tools Search this Thread
      10-07-2017, 06:04 PM   #1
IssaF32
Private First Class
IssaF32's Avatar
United_States
7
Rep
107
Posts

Drives: 2014 428xi Coupe
Join Date: Sep 2017
Location: San diego

iTrader: (0)

Hey guys so I'm not sure if there's existing threads or whatever but after installing my new injen intake on my 428i when I put it in gear in drive it'll bounce me back and forth until it gets above about 6 mph. This also occurs when I'm braking and comming to a stop it'll bounce and as soon as I let off the brake it'll bounce some more. Crazy thing is, my Rpms don't change at all when this bouncing thing occurs So what could be the issue here. As soon as I accelerate there's no bouncing occurring, it's only when comming to a stop or in idle from a stop It like throws me forward then back in my seat then forward again like 5 or 6 times. Anyone ever experience this issue with their car or previous cars in anyway shape or form? Because I can't find anything anywhere. Throttle response hasn't changed everything is fine but why is my car bouncing ??

Edit: I'm not familiar with this running lean concept, Could that cause it to shake back and forth at idleing speed, or no. It's fine as soon as I press the gas past 5-6 mph. Could my brakes be sticking ? Any help would be appreciated to anyone who knows what they are talking about. Thank you.
__________________
Wagner Comp Evo 1 Intercooler, Injen intake, Dinan Tune. Current status: Slower then you
Appreciate 0
      10-08-2017, 10:48 AM   #2
Shri2222
New Member
Shri2222's Avatar
2
Rep
21
Posts

Drives: 2013 328xi
Join Date: Sep 2016
Location: NJ

iTrader: (0)

Sounds like you have a vacuum leak, check your clamps/pipes and hoses.
Appreciate 0
      10-08-2017, 03:34 PM   #3
Diegov209
Second Lieutenant
United_States
22
Rep
240
Posts

Drives: bmw 328i 2012
Join Date: Mar 2017
Location: Riverbank,CA

iTrader: (0)

Quote:
Originally Posted by IssaF32 View Post
Hey guys so I'm not sure if there's existing threads or whatever but after installing my new injen intake on my 428i when I put it in gear in drive it'll bounce me back and forth until it gets above about 6 mph. This also occurs when I'm braking and comming to a stop it'll bounce and as soon as I let off the brake it'll bounce some more. Crazy thing is, my Rpms don't change at all when this bouncing thing occurs So what could be the issue here. As soon as I accelerate there's no bouncing occurring, it's only when comming to a stop or in idle from a stop It like throws me forward then back in my seat then forward again like 5 or 6 times. Anyone ever experience this issue with their car or previous cars in anyway shape or form? Because I can't find anything anywhere. Throttle response hasn't changed everything is fine but why is my car bouncing ??

Edit: I'm not familiar with this running lean concept, Could that cause it to shake back and forth at idleing speed, or no. It's fine as soon as I press the gas past 5-6 mph. Could my brakes be sticking ? Any help would be appreciated to anyone who knows what they are talking about. Thank you.
Boost leak sir make sure the intake or chargepipes are connected good. It is most likely just a leak nothing big lol
Appreciate 0
      10-08-2017, 08:15 PM   #4
IssaF32
Private First Class
IssaF32's Avatar
United_States
7
Rep
107
Posts

Drives: 2014 428xi Coupe
Join Date: Sep 2017
Location: San diego

iTrader: (0)

For some reason it happens a lot when I'm braking at low speeds
__________________
Wagner Comp Evo 1 Intercooler, Injen intake, Dinan Tune. Current status: Slower then you
Appreciate 0
      10-09-2017, 12:59 PM   #5
Diegov209
Second Lieutenant
United_States
22
Rep
240
Posts

Drives: bmw 328i 2012
Join Date: Mar 2017
Location: Riverbank,CA

iTrader: (0)

Quote:
Originally Posted by IssaF32 View Post
For some reason it happens a lot when I'm braking at low speeds
When your at a stop this it jolt forward or feel like it wants to turn off also any loss in power you feel?
Appreciate 0
      10-09-2017, 04:46 PM   #6
D041987
First Lieutenant
United_States
70
Rep
357
Posts

Drives: 2012 328I 6speed
Join Date: Apr 2016
Location: Lynnwood, WA

iTrader: (0)

Did you make sure to check and see if you have a VAC line going to the OEM intake and that you plugged it into the new one? If your car does not have a vac line, you need to cap the nipple by the filter on the Injen intake. Next would be to check your hoses and pipes and clamp them on tight.
Appreciate 0
      10-10-2017, 01:09 PM   #7
IssaF32
Private First Class
IssaF32's Avatar
United_States
7
Rep
107
Posts

Drives: 2014 428xi Coupe
Join Date: Sep 2017
Location: San diego

iTrader: (0)

Quote:
Originally Posted by Diegov209 View Post
Quote:
Originally Posted by IssaF32 View Post
For some reason it happens a lot when I'm braking at low speeds
When your at a stop this it jolt forward or feel like it wants to turn off also any loss in power you feel?
I don't experience any loss in power that I feel
__________________
Wagner Comp Evo 1 Intercooler, Injen intake, Dinan Tune. Current status: Slower then you
Appreciate 0
      10-10-2017, 01:10 PM   #8
IssaF32
Private First Class
IssaF32's Avatar
United_States
7
Rep
107
Posts

Drives: 2014 428xi Coupe
Join Date: Sep 2017
Location: San diego

iTrader: (0)

Quote:
Originally Posted by D041987 View Post
Did you make sure to check and see if you have a VAC line going to the OEM intake and that you plugged it into the new one? If your car does not have a vac line, you need to cap the nipple by the filter on the Injen intake. Next would be to check your hoses and pipes and clamp them on tight.
I'll check my vac lines today and get back to you
__________________
Wagner Comp Evo 1 Intercooler, Injen intake, Dinan Tune. Current status: Slower then you
Appreciate 0
      10-12-2017, 11:39 AM   #9
Domotron
First Lieutenant
Domotron's Avatar
United_States
34
Rep
387
Posts

Drives: 2014 BMW 328xi M-Sport
Join Date: Feb 2013
Location: St. Louis

iTrader: (0)

there is autotrans vac line that connects to the intake pipe.. might wanna look at that one first.
__________________
2014 Estoril Blue II BMW 328i xdrive ///M-Sport
Appreciate 0
      10-15-2017, 11:32 PM   #10
IssaF32
Private First Class
IssaF32's Avatar
United_States
7
Rep
107
Posts

Drives: 2014 428xi Coupe
Join Date: Sep 2017
Location: San diego

iTrader: (0)

So my vac line is completely secure. The one next to the maf sensor
__________________
Wagner Comp Evo 1 Intercooler, Injen intake, Dinan Tune. Current status: Slower then you
Appreciate 0
      10-16-2017, 12:09 AM   #11
IssaF32
Private First Class
IssaF32's Avatar
United_States
7
Rep
107
Posts

Drives: 2014 428xi Coupe
Join Date: Sep 2017
Location: San diego

iTrader: (0)

Pretty sure somehow my brakes are sticking
__________________
Wagner Comp Evo 1 Intercooler, Injen intake, Dinan Tune. Current status: Slower then you
Appreciate 0
      10-16-2017, 06:47 PM   #12
Sielth3284
Registered
0
Rep
1
Posts

Drives: 2014 320iX
Join Date: Mar 2017
Location: Kingston, PA

iTrader: (0)

Nothing wrong with the Injen Intake

Mine has been on my 320iX since febuary. No issues at all, You might have something else going on.
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT -4. The time now is 05:10 PM.




f30post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST