My car sputters when I first start it and slow down. Once I get on the highway it runs just fine. Is it my fuel filter and spark plugs?
Where is my fuel filter located? And the spark plugs on 1998 Plymouth Breeze
Based on your question, you should let a mechanic check this out for you. Fuel fillter replacement, especially on this car, is not a novice diy repair, spark plugs can also be a tricky replacement and can damage the engine if not done properly. It's possible that is not the problem anyway, so the mechanic is needed to find out what it is.
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get proper diag as not to waste time and $