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Mike_Yi · 10-18-2010, 05:23 AM

Thanks for the input guys. It is definitely not speed related, but it is definitely rpm related. A coil pack makes sense. The engine does really feel like one cylinder isn't firing at all above 4k rpm. I think a plug wire would be intermittent. I'm going to pull the plugs today and see if any have a different look to them or smell of unburnt fuel. I may do a spark test on them too.

Thanks again for the input. I'm glad Jake thinks it's not internal.

10-18-2010, 05:23 AM	#6
Mike_Yi Registered User Join Date: Mar 2008 Location: near Chicago Posts: 523	Thanks for the input guys. It is definitely not speed related, but it is definitely rpm related. A coil pack makes sense. The engine does really feel like one cylinder isn't firing at all above 4k rpm. I think a plug wire would be intermittent. I'm going to pull the plugs today and see if any have a different look to them or smell of unburnt fuel. I may do a spark test on them too. Thanks again for the input. I'm glad Jake thinks it's not internal. Last edited by Mike_Yi; 10-18-2010 at 06:48 AM.