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Q: Car Idles low and high on 1997 Toyota Camry

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
The past few weeks I've been having idling issues. When I'm stopped at a light, the car at times idles low at around 800 rpms, then can jump to 1200 rpms. This morning at a light, it dropped to about 400 and was shaking like it was going to stall then spiked to 1200 before coming back down. At times when I take my foot off the brake, sometimes my car jumps forward ready to take off before I hit the gas. When I got home this evening, I put the car in park and it was idling between 1200-1400 rpms. I had it at the dealership last week and they suggested a dirty throttle body. My husband cleaned it yesterday and said it wasn't dirty. This idling issue is getting worse each day. Any ideas?
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