1992 geo prizm but is is an lsi,gsi or something else? how can I tell.
Idle is terrible needs new spark plugs. not sure what to buy. female. thanks guys. What should I get? Original was the AC Delco 41-801 but local parts guy says the NGK Irridium 6418. Are these both pre-gapped and is it really worth the money to get the NGK since it runs so rough? I only know it is the spark plugs because someone pulled them out, gapped them wrong and then realized and gapped them right and it did make it better. Just for a laugh, when I went to a local shop, the so called mechanics had never added anti- freeze directly to the radiator. They had never heard of such. Oh my goodness. HELP.
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