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Default Is it time to get colder plugs? - 08-04-2019, 08:08 PM

So i bought my car @38k miles untuned off lease. bumped it up to stage 2 for about 13000k miles, it ran great & hard on E40 up to 21PSI and taper off. But now... ever since I went BEF + jb4 if i go over 15/16 PSI in 3rd or 4th gear, my #4 cylinder starts to misfire.

I even went down to E20 and 17PSI, seems like it doesn't even try to pull timing #4 just ****s the bed.

Is it time for the colder plugs?

Experiences?


Performance: 2014 435i : F33 (convertible) : 8AT : BMS Intake : VSRF Charge Pipe - Down Pipe & FMIC : JB4 Stage 2 : FF Wires : EWG Wires : 40% E85 : XHP Stage 3: E85 BEF

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Default 08-05-2019, 10:45 AM

Yes, sounds like spark plug symptoms.

You'll need a set of these:

https://burgertuning.com/products/ng...nt=32079075982


Burger Motorsports
Home of the Worlds fastest N20s, N54s, N55s, S55s, N63s, and S63s!

It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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Default 08-05-2019, 01:57 PM

Quote:
Originally Posted by Payam @ BMS
Yes, sounds like spark plug symptoms.

You'll need a set of these:

https://burgertuning.com/products/ng...nt=32079075982
Thanks Payam! Just ordered the whole set with the gapper.


Performance: 2014 435i : F33 (convertible) : 8AT : BMS Intake : VSRF Charge Pipe - Down Pipe & FMIC : JB4 Stage 2 : FF Wires : EWG Wires : 40% E85 : XHP Stage 3: E85 BEF

Dragy: "Spammer" 12.72@111.70 | 0-60 4.71
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LeeOrl LeeOrl is offline
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Default 08-17-2019, 07:48 AM

while you are doing the plugs try and swap the #4 coil with one of the others. if the plugs do not correct the misfire and it follows the coil you will be a step ahead on the troubleshooting
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Default 08-17-2019, 07:53 AM

Good idea - thanks for the suggestion!


Performance: 2014 435i : F33 (convertible) : 8AT : BMS Intake : VSRF Charge Pipe - Down Pipe & FMIC : JB4 Stage 2 : FF Wires : EWG Wires : 40% E85 : XHP Stage 3: E85 BEF

Dragy: "Spammer" 12.72@111.70 | 0-60 4.71
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Default 08-17-2019, 10:33 AM

Bought the whole BMS set, and gaped them myself to .22 w/ the tool. just took it for a test drive. Kind of nervous my first time doing it and on a BMW. FREEDOOOMMM!!!

Man, loaded my kill map up to 21psi loaded up on E40 & floored it (of course after a leisurely drive then spirited drive monitoring all cylinders.) everything is beautiful again, hitting peak target w/no issues, banging through gears, foot to the floor the whole way. So relieved. The front end really lifting up like it did before when i first tuned it.

BMW F32 435i N55 Ignition Projects coil packs and spark plugs DIY - YouTube - good video for the 435i on how to do it.

Thanks BMS


Performance: 2014 435i : F33 (convertible) : 8AT : BMS Intake : VSRF Charge Pipe - Down Pipe & FMIC : JB4 Stage 2 : FF Wires : EWG Wires : 40% E85 : XHP Stage 3: E85 BEF

Dragy: "Spammer" 12.72@111.70 | 0-60 4.71
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Default 08-19-2019, 11:24 AM

Awesome!!!


Burger Motorsports
Home of the Worlds fastest N20s, N54s, N55s, S55s, N63s, and S63s!

It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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