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      09-12-2019, 12:16 AM   #1
vinzcast21
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B58 acting weird

Anyone can guess what's happening to my engine? this is while the car is idling no gas is inputted. no mods, bone stock

going to the dealer soon to check, but any guess for the problem will be appreciated!



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      09-12-2019, 02:55 AM   #2
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Im tuned stage 2 e30 fbo, and I get this too. I'm pretty sure its normal.
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      09-12-2019, 03:58 AM   #3
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Originally Posted by bacon_45 View Post
Im tuned stage 2 e30 fbo, and I get this too. I'm pretty sure its normal.
yeah but im not tuned
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      09-12-2019, 06:56 AM   #4
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My e46 M3 used to do the same when it has a vacuum leak. I'm not a mechanic so I may be talking bull!
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      09-14-2019, 11:41 AM   #5
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Does it do it all the time, just after cold start, etc. I have always gotten a slight hiccup like that when driving away on a cold engine.
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      09-14-2019, 12:03 PM   #6
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Quote:
Originally Posted by Wires View Post
Does it do it all the time, just after cold start, etc. I have always gotten a slight hiccup like that when driving away on a cold engine.
mostly after filling up not cold start
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      09-15-2019, 03:55 AM   #7
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My idle never moves. It's stock
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      09-15-2019, 07:44 AM   #8
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my guess is vacuum leak or something with the ignition causing the car to stumble. wouldn't hurt to scan for codes and see if anything comes up.
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      09-20-2019, 04:49 PM   #9
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Quote:
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my guess is vacuum leak or something with the ignition causing the car to stumble. wouldn't hurt to scan for codes and see if anything comes up.
injector was loose. fixed
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      09-23-2019, 09:58 PM   #10
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Quote:
Originally Posted by vinzcast21 View Post
Quote:
Originally Posted by kern417 View Post
my guess is vacuum leak or something with the ignition causing the car to stumble. wouldn't hurt to scan for codes and see if anything comes up.
injector was loose. fixed
My car does it too now. Didnt do it stock but from the very day i went stage 2 93 mhd tune it started. No idea if its normal or not.
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      09-25-2019, 05:32 AM   #11
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Quote:
Originally Posted by F30moni View Post
My car does it too now. Didnt do it stock but from the very day i went stage 2 93 mhd tune it started. No idea if its normal or not.
I have MHD stage 1 93 map same issue but only after car being warm and if i drive it bit faster?
Did you try to contact MHD?
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      09-26-2019, 12:01 AM   #12
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Quote:
Originally Posted by vinzcast21 View Post
injector was loose. fixed
I'm having the same issue. It started after I installed a catless downpipe and started running BM3 stage 2 93 octane (AGG).

Would you be able to describe in greater detail what you had to tighten, how you got to it, etc.? I know where the fuel rail is and I have diagrams of system itself, but I'm in no way familiar with either... Help would be greatly appreciated.

Attachments:
1. B58 Breakdown Video (https://www.enginelabs.com/news/tear...linder-engine/ // see 03:57 - 04:55)
2. HPFP-to-Fuel Rail Diagram
3. Fuel Rail & Fuel Injectors Diagram
Attached Images
  
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      10-14-2019, 07:00 AM   #13
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Quote:
Originally Posted by aadum View Post
Quote:
Originally Posted by F30moni View Post
My car does it too now. Didnt do it stock but from the very day i went stage 2 93 mhd tune it started. No idea if its normal or not.
I have MHD stage 1 93 map same issue but only after car being warm and if i drive it bit faster?
Did you try to contact MHD?
I havent done so, ill log the car tmm and send it in since they'll probably request a log
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      10-19-2019, 03:27 PM   #14
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update: the problem lies on the evap cannister
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      10-19-2019, 08:28 PM   #15
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Quote:
Originally Posted by vinzcast21 View Post
update: the problem lies on the evap cannister
So you ended figuring out it was the injector
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