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Wraith07 Wraith07 is offline
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Default Changed all injectors, still getting rough idle - 05-11-2015, 05:38 AM

As the title says, I changed and coded all 6 injectors and I'm still getting a rough idle, and cold start.

Could a fouled plug be causing this? Could a coil pack be causing this? VCG has already been done.

And off-topic but is there a spark plug too for our cars that doesn't come loose from the socket? My Toyota has a flexible one that is attached to an extender bar permanently which doesn't come loose.
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alaa1435 alaa1435 is offline
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Default 05-11-2015, 05:44 AM

How much u bought 6 injrctors for? Besides i assume u might have one of the air hoses leaking air outside then car wil shake
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Wraith07 Wraith07 is offline
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Default 05-11-2015, 06:26 AM

$1300 from ECS tuning. Which airhose? There does seem to be alot of wooshing sounds these days.
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Kommodore Kommodore is offline
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Default 05-11-2015, 06:47 AM

valve cover, intake valves, coils, plugs, vent hose. May as well just do it all.
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drfrink24 drfrink24 is offline
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Default 05-11-2015, 08:12 AM

Have you tried resetting all adaptations, including the throttle reset?
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Xshadows Xshadows is offline
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Default 05-11-2015, 08:15 AM

Clean valves. Make sure your injectors are coded. Replace all coilpacks and spark plugs. Replace or clean your VANOS. Reset adaptations.
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Vertigo Vertigo is offline
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Default 05-11-2015, 08:37 AM

Quote:
Originally Posted by Xshadows
Clean valves. Make sure your injectors are coded. Replace all coilpacks and spark plugs. Replace or clean your VANOS. Reset adaptations.
^ This.


2008 335i stock
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Wraith07 Wraith07 is offline
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Default 05-11-2015, 09:04 AM

VCG done about 15k ago along with VANOS and plugs, injectors have been coded. Walnut blasting done about 5k ago. Injectors were just done.

Instead of throwing money at it, would bad coils cause stumbling/misfires (no-codes though) /rough idle? I'll reset adaptations tonight. Plug 2 is fouled, would a fouled plug cause this?
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Kommodore Kommodore is offline
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Default 05-11-2015, 09:17 AM

Valve cover gasket was done, did you check all the ports when you had the cover off? They get clogged over time and attribute to stumbling idle issues.
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oldman12 oldman12 is offline
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Default 05-11-2015, 09:23 AM

Bad coils CAN cause the problems you describe... Dont just throw money at it. Create a log and see if a specific cylinder is coming up with a code first. If not, check the plugs as well to see if any of them have excessive oil or a gas smell. You may need to re seat one or more of the valves.


JB4 G5 ISO; Hexon Hybrid 600; ER FMIC; Dr.Euro ***; RPI Scoop; BMS OCC & Thermo; KN Drop; AEM320e; M5 brakes; ST coils; 19" Renn Motorsport RS-51
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Wraith07 Wraith07 is offline
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Default 05-11-2015, 10:04 AM

A shop did the VCG, how do I create the log? I'm fairly technical so if you can give me pointers. Codes wern't displaying for misfires or cylinders through INPA.
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