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3van 3van is offline
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Default Can't figure out what's wrong - 02-23-2019, 02:04 PM

FBO pure turbo stage 1 335i

Car sat for 5 months, and started throwing random check engine lights after the sit. I thought it was the fuel, but after a few tanks it wasn't. Noticed it would throw a CEL @ 5.5-6k rpms wot. So I decided to change the plugs, ngk -1 .. which were the same ones that were in the car. old ones didn't look fouled once pulled.Igapped them to .22

Drove the car, once again got a cell (sometimes) for a camshaft sensor, intake. So while waiting for the part I cleaned my vanos solenoids. I Swapped the sensor today and idle and driving is perfect. Car pulls hard, but now around 6k the car misfires cylinder 1 & 3. Prior to today, never got a misfire in any cylinder. I am stumped and don't know what else to do. AFR is digital using jb4 and the car isn't running lean. Fuel pressure L/H is perfect.

Someone help
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treehouse treehouse is offline
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Default 02-23-2019, 02:34 PM

Swap coils from bank 1 to 2. See if the failure follows.
If still on bank 1 then do injectors.
Swap and recode injectors between banks. See if the problem follows
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3van 3van is offline
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Default 02-23-2019, 03:30 PM

Quote:
Originally Posted by treehouse
Swap coils from bank 1 to 2. See if the failure follows.
If still on bank 1 then do injectors.
Swap and recode injectors between banks. See if the problem follows
That's what I'm going to try tomorrow, start with coils. If it's not, might bring it somewhere to get it diagnosed
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3van 3van is offline
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Default 02-24-2019, 02:39 PM

Just swapped coils, still cyl 1 & 3 ****.
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treehouse treehouse is offline
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Default 02-24-2019, 03:58 PM

You could also check if there is gas on a plug after sitting for a bit. That would indicate a failed injector as well.
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3van 3van is offline
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Default 02-26-2019, 08:04 AM

Quote:
Originally Posted by treehouse
You could also check if there is gas on a plug after sitting for a bit. That would indicate a failed injector as well.
Just did brand new plugs .22 gap ngk -1 laser iridiums

Last edited by 3van; 02-26-2019 at 08:22 AM..
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Dave @ BMS/Fuel-It!'s Avatar
Dave @ BMS/Fuel-It! Dave @ BMS/Fuel-It! is offline
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Default 02-27-2019, 12:28 AM

Quote:
Originally Posted by 3van
Just did brand new plugs .22 gap ngk -1 laser iridiums
.22 or .022?

If .22 thatís an issue too.


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Home of the JB4 the worlds most popular turbocharged tuning system!

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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3van 3van is offline
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Default 02-27-2019, 07:57 AM

.022 gapped typo.
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Default 02-27-2019, 12:03 PM

Let the car sit overnight -

Pull plugs 1-3- see if they’re wet with fuel.

If yes- injector on that bank

Edit- could also check the gap & close it a bit to .020


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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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