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I've been running NGK TR-55s gapped at .055 since my first plug swap at around 30,000 miles. I have 80k now swapping them 15-20k. Zero issues lots and lots of hard use (HPDE use).
I have only 13,500 mi on my 02 coupe. I know they are the original plugs and wires and have lots of miles left on them. My concern is they have been in there for 7 years. Should I change them?
I have only 13,500 mi on my 02 coupe. I know they are the original plugs and wires and have lots of miles left on them. My concern is they have been in there for 7 years. Should I change them?
Going by the service manual, plugs are changed at 100K miles, and wires inspected. At the very least, I would pull the plugs and inspect the condition. Also check the wires for the same. If you do decide to change them out, and stay stock, you are looking at ~$100 for plug/wires....not really a big deal if they last you another 7 years...
I purchased a set yesterday for my '01, and they gave me 41-110. A search on the AC Delco website, shows that this is the correct plug. A search for 41-985 turns up nothing???
