owned this car for about 2 yrs.never replaced the plugs but it started running rough so i put new plugs in..the old ones looked ok but were gapped anywhere from 70 to 85.. the new ones (regular ac delco not split rings or anything fancy) should be gapped at 45 so i was told at the place i bought them.. would anything i should look at make the old spark plugs have such a wider gap or did i get misinfo about the proper gap?. thanks in advance..
The gap you saw on the old plugs was most likely the result of wear. You had the car 2 years and how long prior to that were those plugs installed? .045" gap sounds about correct for new plugs although I don't know the exact specs for your Corsica.
There is an information sticker in the engine compartment that gives timing and sparkplug specs.
Jim.J
Just in case the emissions sticker in the engine compartment is missing or damaged, the correct spark plug gap is .045 inch. If you can get the sticker at a dealer, it will cost $3 to $5.
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