I have a 2006 Chevy Aveo Hatchback. When I bought it, I knew the previous owner didn't do much in maintenance on the car, so I had to do a few things. I did my first valve cover gasket change due to oil in the plug wells, got new tires, plugs and wires, etc. I keep the oil changed with synthetic now, as I drive about 1000 miles a week delivering car parts.
Recently, the transmission let go, and had to be rebuilt. I had the timing belt and tensioner changed. Some front suspension parts were changed, and I had a wheel bearing go on the driver side front that was replaced.
Recently with the onset of winter I've noticed a little hesitation at throttle tip in. The faster you floor it, the more of a hesitation you get. But after this initial hesitation, it seems fine otherwise. Gas mileage has hovered around 28mpg since I got it. I searched through this forum, and I have tried a couple things, including new plugs and wires again, and cleaning the throttle body (TB). Initially, I couldn't get the butterfly to open, even when I turned on the car and pressed in on the gas (with a broom). I didn't want to hurt it, but I now realize it takes a lot of pressure to open.
So, I went out to get codes today, since I wasn't feeling too lazy, and had some time. The codes are P2188, P0068, P2106, P2110, P0172, P0106, and P161B. After searching through the forums, TB cleaning seems to be the main issue. So back out with a screwdriver, soft tooth brush, and carb cleaner. and this time I forced it open, and my toothbrush turned practically black. I then inspected the hose going to the TB and saw a crack that could be causing the dirt issue. I'll be replacing that ASAP.
After cleaning the TB, I'm still getting the hesitation. Is it possible the TB is so gunked up it needs replaced? And is there anything else I should be looking at?