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CODE P0304 PENDING,NEW COILS, NEW INJECTORS,NEW SPARK PLUGS BOSCH PLATINUM 4,

Submitted: 708 days and 9 hours ago.

Category: BMW

Value: $9

Status:

Hello I'm Chris a Certified Engine/Transmission Specialist. Thanks for asking your question. I am eager to get your vehicle back up and running correct, I am here to help you out for a small fee far less than a dealership and easier on the wallet, so if this information is of aid PLEASE PRESS ACCEPT and help me out financially by paying the small fee. Please reply if further discussion is needed.
Since you have done just about everything to cure this cylinder 4 misfire I recommend a compression test and compare it to other cylinders. A possible valve concern is a possibility also a coil firing signal can be at fault also an injector pulse can be missing. I recommend you remove the plug and compare it to other plugs. A plug electrode appearance can many times give results to the cause.

Accepts:
Expert:	Chris (aka-Moose)
Pos. Feedback:	100.0 %
Answered:	12/15/2007

BMW Technician

Specialized Tech. in Transmission, Transfer Case, Driveline, Brakes, Engine, Elect.,and Suspension

707 days and 8 hours ago.

Reply

When I first turn on the car the car starts shaking and the check engine lights goes on. When I turn the car off after a few minutes and re-start it, it does not shake. The check engine light goes out. No miss fires appears. Number 4 cylinder. I did not replace the original sparkplugs. BMW recommended NGK platinum 4 but I installed Bosch platinum 4 instead. Could that be the problem? Or could it be the mass air flow sensor? Thank you very much.

Accepted Answer

Since it is affecting one cylinder then The plug could be faulty. I personally have seen and repaired many concerns associated with bosch plugs being installed.

Accepts:
Expert:	Chris (aka-Moose)
Pos. Feedback:	100.0 %
Answered:	12/16/2007

BMW Technician

Specialized Tech. in Transmission, Transfer Case, Driveline, Brakes, Engine, Elect.,and Suspension

706 days and 18 hours ago.

Reply

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When I first turn on the car the car starts shaking and the check engine lights goes on. When I turn the car off after a few minutes and re-start it, it does not shake. The check engine light goes out. No miss fires appears. Number 4 cylinder

Posted by Chris (aka-Moose) 706 days and 18 hours ago.

Answer

You are going to need a scan tool to monitor the coil and injector to see if they are not contributing when the engine is shaking.

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CODE P0304 PENDING,NEW COILS, NEW INJECTORS,NEW SPARK PLUGS BOSCH PLATINUM 4,

Accepted Answer

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Accepted Answer

Since it is affecting one cylinder then The plug could be faulty. I personally have seen and repaired many concerns associated with bosch plugs being installed.

Reply

Answer

You are going to need a scan tool to monitor the coil and injector to see if they are not contributing when the engine is shaking.

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