Did I needlessly replace coils and plugs?
01-17-2017, 05:04 PM
#1
Instructor
Thread Starter
Did I needlessly replace coils and plugs?
2006 CS Ti. Approx 130,000 miles
Recently the CEL came on. My OBDII reader showed misfire for all cylinders (this was on a cold start, so not warmed up yet). Previously it had shown misfire in the ready list so I figured this has been intermittent for a while although the car has been driving fine. No issues with power, hesitation, fuel mileage, etc. So, I went ahead and ordered the coils and plugs and changed them today. Every coil looks perfect. No signs of cracking anywhere. The plugs also looked absolutely fine. What I'm figuring (hoping?) at this point is the coils themselves are failing. See the link for pics. The service history I have shows these were changed at 102,000 miles with the 002 part. The coils I installed are 012. Not sure this is going to make any difference but time will tell.
http://s1172.photobucket.com/user/tj...nition%20parts
Recently the CEL came on. My OBDII reader showed misfire for all cylinders (this was on a cold start, so not warmed up yet). Previously it had shown misfire in the ready list so I figured this has been intermittent for a while although the car has been driving fine. No issues with power, hesitation, fuel mileage, etc. So, I went ahead and ordered the coils and plugs and changed them today. Every coil looks perfect. No signs of cracking anywhere. The plugs also looked absolutely fine. What I'm figuring (hoping?) at this point is the coils themselves are failing. See the link for pics. The service history I have shows these were changed at 102,000 miles with the 002 part. The coils I installed are 012. Not sure this is going to make any difference but time will tell.
http://s1172.photobucket.com/user/tj...nition%20parts
01-17-2017, 05:16 PM
#2
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Photobucket sez:
Originally Posted by Photobucket:
Hmm, we can't reach this page.
Try this
Make sure you’ve got the right web address: http://s1172.photobucket.com
Try this
Make sure you’ve got the right web address: http://s1172.photobucket.com
01-17-2017, 08:21 PM
#3
Instructor
Thread Starter
01-17-2017, 10:32 PM
#5
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Chuck the plugs - the center electrode should have a square edge from the horizontal to the vertical. They're worn -- and the electrode no longer looks exactly round when zoomed in on (a bit hard to really tell since your cell phone didn't focus all that well.) If the coils show no cracks - keep them as spares. Toss 1-2 in the spare tire well and you can be certain you'll never need them.
01-20-2017, 11:18 AM
#7
Nordschleife Master
Porsche recommends the spark plugs be changed every 60k miles on a CS and every 40k on a CTT and judging by the pictures you posted the spark plugs look worn to me.
