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Originally Posted by toicy4ya
I'm currently getting about 190mpg city driving on a full tank (on a 2.4. GS engine). I used NGK sparks. If I recall correctly I didnt gap them because I believe they were already factory gapped. However I've been having the gas mileage problem prior to giving it a tune up.
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I said MPG, not miles per tank. The gas gauge is off, so you need to fill it up, set the trip odometer, drive it down to when you think it's getting close to empty, then fill it full again and see how many gallons you dump in. Then get a real number to compare to.
The plugs do not usually come pre-gapped specific to your vehicle, they gap them at some common gap used by a few vehicles, and hope its close to yours. Pull them and re-gap them to the specs for your vehicle.