Morissey

Just now, Morissey said:

I have yet to get into the inspection and diag process. I plan to check everything with air, fuel and ignition, starting with ignition.

I am certain about codes 1,5 and 6. I understand our question and double-checked the codes. Indeed very odd.

While I do the discovery...Someone suggested the symptoms seem more timing related than ignition, arguing that 3 random cyls could not begin misfiring at the same time...thoughts?

Sorry about the typo. Meant 'your' question.

2 hours ago, Schnell Gelb said:

Agree with the deferred maintenance diagnosis .If the plugs,seal,coils are old - it is prudent to replace all in my experience.It will eliminate all those issues from any future diagnosis.

Seems you have misfire on cyls. 1,5,6. So both Banks are affected. Are you sure the 6 was not a 3 ? I ask because that would have limited the diagnosis to Bank 1. In turn that would have suggested a need to check the static timing (the green plugs job).

Were the plugs tips wet with gasoline or oil ?  Was the body of the plug wet with oil(seal leakage)?

Once you've done the parts replacement work let us know what codes you get?

A good idea to poke around looking for vacuum leaks

I have yet to get into the inspection and diag process. I plan to check everything with air, fuel and ignition, starting with ignition.

I am certain about codes 1,5 and 6. I understand our question and double-checked the codes. Indeed very odd.

While I do the discovery...Someone suggested the symptoms seem more timing related than ignition, arguing that 3 random cyls could not begin misfiring at the same time...thoughts?

Thanks Loren. I will start with your suggestion and other obvious checks soon as I get into the engine bay. Will touch base once I do.

BTW, fault codes are P0300, P0301, P0306, P0305. In that order

Hi Everyone, I'm new to the post and need to resurrect this old thread as I have exactly the same issue. Brian H, if you are still around did you get to the bottom it with your car? I also have a 2001 Boxster S that just went down the same way this weekend. 

I would appreciate any information anyone can provide!

Thanks in advance,

Morrissey