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I have a 2007 Base Solstice with a little over 147,000 miles on it. It's been running like a champ, until I parked it for 3 weeks. I checked it once a week, ran the engine, and the like. I started driving it full time again, and the engine threw a P0014 code. I replaced the camshaft solenoids, intake and exhaust. However, even though I'm not throwing a code now, I'm still having engine hesitation, low power, and slow acceleration in second and third gears. I've seen threads on here referring to the catalytic converter being bad, but I'm leaning toward fouled spark plugs, since it has been sitting, or could it be water/condensation in the gasoline? However, the engine idles fine, and gas mileage is about the same, but I'll get the occasional P0420 code. I also started hearing a whirring/spinning/grinding noise when shifting the clutch until it warms up. Why would that suddenly start also, and should I just check the brake fluid, or just replace the clutch? I want to diagnose it myself, since I really detest mechanics, but I feel like this ---->:willy: Any ideas? Parking a car for a while is hell on it, I suppose...