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Posted: 10/16/06
07:03 AM
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My 98 Subaru Forester has 77,000 milles. I bought it used and am unsure if the plugs/wires were changed at 60,000 miles. If the plugs/wires needed to be change wouldn't it run rough in both drive and in neutral? Recently the car has seen a 20% decrease in gas mileage and has begun to run rough when I stop at a light. If I shift into neutral the egine then runs smooth. The car also turns over a couple of time before it starts. Am I looking in the right direction or is there another way I need to go?
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Posted: 10/17/06
12:51 AM
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Plugs and wires are a good place to start. My Mazda lost ~20% mileage when running fouled plugs, plus (and due to) bad rings in a couple cylinders. Idle was noticeably improved when I replaced the plugs. Plugs/wires may not be your only problem but it helps to establish a known good baseline on the routine maintenance parts before proceding with additional diagnostics. Hopefully some performance gurus will chime in and add additional insight.
Just my $.02
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