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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > USA - California > Stumbling Idle



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      09-08-2016, 12:37 AM   #1
speedracer2169
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Stumbling Idle

So this just started on Thursday and I'm kind of at a loss on what to do next. I already replaced the MAP sensor, decarbon the intake manifold and throttle body replaced coils and plugs... Any help would be appreciated. Thanks
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      09-08-2016, 01:03 AM   #2
FEDE/E92
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You try resetting adaptations?
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      09-08-2016, 01:29 AM   #3
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CPS might be going south
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      09-08-2016, 11:39 AM   #4
speedracer2169
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Quote:
Originally Posted by nicegsxr View Post
CPS might be going south
CPS? can you elaborate a little please?
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      09-08-2016, 11:40 AM   #5
speedracer2169
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Quote:
Originally Posted by FEDE/E92 View Post
You try resetting adaptations?
Unfortunately I don't have a scan tool to do that? Do you recommend someone that can do it?
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      09-08-2016, 12:15 PM   #6
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Is it a rough idle? Does the engine shake erratically when it does that? I had a similar thing happen to me and it was bad injectors.
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      09-08-2016, 12:46 PM   #7
speedracer2169
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Quote:
Originally Posted by E9TOU View Post
Is it a rough idle? Does the engine shake erratically when it does that? I had a similar thing happen to me and it was bad injectors.
No it's not a rough idle. It sometimes corrects itself if i let it idle for a while. It got better when I replaced the coils and spark plugs but it's still there. Very annoying when sitting in traffic or next to a mustang at a red light thinking I'm trying to race him. No misfires under full throttle pulls like a champ just the idle is driving me nuts.
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      09-08-2016, 01:16 PM   #8
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Have you tried reading codes?

I have a Schawben scan tool that is capable of adaptation resets. Located in Downey also.

Last edited by alpin3d3vil335; 09-08-2016 at 01:22 PM.
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      09-08-2016, 02:05 PM   #9
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Quote:
Originally Posted by speedracer2169 View Post
Unfortunately I don't have a scan tool to do that? Do you recommend someone that can do it?
Where are you located?
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      09-08-2016, 02:56 PM   #10
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Quote:
Originally Posted by speedracer2169 View Post
CPS? can you elaborate a little please?
Did you car ever stall? Or all of sudden the powerband seems off?
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      09-08-2016, 03:52 PM   #11
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Quote:
Originally Posted by alpin3d3vil335 View Post
Have you tried reading codes?

I have a Schawben scan tool that is capable of adaptation resets. Located in Downey also.
If you dont mind helping me out I would apprciate it. I usually get home around 7pm.
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      09-08-2016, 03:53 PM   #12
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Quote:
Originally Posted by FEDE/E92 View Post
Where are you located?
I'm in Downey
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      09-08-2016, 03:55 PM   #13
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Quote:
Originally Posted by nicegsxr View Post
Did you car ever stall? Or all of sudden the powerband seems off?
Never stalled it almost wants to shut off though but it catches itself and eventually smooths itself out. It pulls hard through all gears and after pushing it hard it will idle fine for a bit and then the idle starts to stumble. It's never consistent either the stumbling will start very light, get heavy then light again and if left sitting long enough it will fix itself
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      09-08-2016, 04:31 PM   #14
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Quote:
Originally Posted by speedracer2169 View Post
If you dont mind helping me out I would apprciate it. I usually get home around 7pm.
PM me.

Last edited by alpin3d3vil335; 09-08-2016 at 04:41 PM.
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      09-08-2016, 04:36 PM   #15
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check for vacuum leaks. Maybe something is not back in place. hoses etc...
any codes?
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      09-08-2016, 07:07 PM   #16
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Quote:
Originally Posted by GoRomeo View Post
check for vacuum leaks. Maybe something is not back in place. hoses etc...
any codes?
I'm going to see if there any codes stored on there. For now there is none and no check engine light
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      09-08-2016, 07:45 PM   #17
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Every bmw owner should get scan tool expecially if they are out of warranty.
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      09-08-2016, 07:54 PM   #18
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The problem is that even if they get one they wont know how to use it...
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      09-08-2016, 07:58 PM   #19
speedracer2169
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What scan tool do you guys recommend?
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      10-19-2016, 07:17 PM   #20
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Throttle body map sensor replaced, map sensor on the piping was cleaned, fuel pressure regulator replaced still having the idle problem. anything else that I'm missing?
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      10-19-2016, 09:01 PM   #21
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I had the exact same problem. Its the injectors. I was not getting any codes either. After i got 6 new index 12 injectors and got them coded, the problem was fixed.
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      10-20-2016, 10:39 AM   #22
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Quote:
Originally Posted by eyzz21
I had the exact same problem. Its the injectors. I was not getting any codes either. After i got 6 new index 12 injectors and got them coded, the problem was fixed.
Is there a way to test the injectors?
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