Quote:
Originally Posted by thelightning
If plugs woke up your engine, the previous plugs where obviously very done.
For the rest; Different sparkplugs will not give you any more performance on a stock car. Tuned +100hp engines need them (colder plugs) to avoid misfires/timing corrections.
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I don't disagree with this statement, but I would suggest checking your spark plug gap as well. Some plugs come pre-gapped but it doesn't take very long to check and gap them if needed. On my 300zx I was getting spark blow out because I wasn't gapped tight enough.
On the N54 it's recommended to gap your plugs to 0.022" up to something like 25psi.