Question on Boxster Plugs Coils

Comments: I just changed plugs in my 2001 Porsche Boxster for the second time every 5k or three summers in my case. I used Bosch Platinum Plus 4 plugs. I took care to check all ignition coils for wear or cracks, all looked like new.
When i started it she fired immediately and sounded good. But when I took it on the road it feels sluggish. The car had more zip before I replaced the Beru plugs that I put in there three summers ago. Could I have a bad plug? How can I check the plugs? Love the forum, I have done most of the work on this car myself with your help and parts.
May 1, 2017
Followup from the Pelican Staff: Does it feel like a misfire? If not, the plugs are likely OK. You could be feeling something else that just popped up. - Nick at Pelican Parts
Thanks Nick. I don't think it is misfiring. The sound is more like a wavering. What else do you think it could be?
I was going to replace the old plugs one at a time and test the car after each replacement. Bad idea?
Lou

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This post was auto-generated based upon a question asked on our tech article page here: Porsche Boxster Spark Plugs and Coils Replacement - 986 / 987 (1997-08) - Pelican Parts Technical Article

[Nick at Pelican Parts]

if it were the plugs, it would be misfiring. if that is not the case, the issue may be unrelated. Could be an issue with the fuel pump. I would perform a fuel delivery system test. Check fuel pressure, volume and quality.


- Nick

[BYprodriver]

1st insure all the coil wire leads are properly connected to the proper coil by pulling the connector. it's very easy to not fully engage the connector. It's also possible to bend a plug electrode ground during installation. Pull each plug out to inspect it.

[mikefocke]

Not just brand.