For a couple months now my 2008 Aveo 5 with less than 50k miles on it has been acting up. I get 2 main problems. The check engine light has been on for a while and I've gotten it checked out, but I don't have the codes. I should have them by tomorrow (tuesday) and I'll post them as soon as I get them. I know the codes relate to the throttle position sensor though.
Anyway, here are the problems
1) Gas pedal failure - sometimes I'll be cruising down the street and I'll start slowing down. To counteract the deceleration, I step on the gas pedal. Nothing happens and I find my foot on the floor and still I'm not accelerating, so I have to pull over. If I pop it in neutral and floor it, the engine revs to a little under 2k rpms. In drive, acceleration is non-existent and I can keep 15 mph at most on level ground. The only way to keep going is to turn the car off (put it in park first obviously), take out the key, and reinsert it then start the car. (If I don't remove the key, I will start the car and the gas pedal continues to not work) This is a huge bother to me because I want my gas pedal to work! Why the hell do I have to pull over to the side of the freeway or turn off onto a side street once every week or more often? It's dangerous! Also, whenever this happens, the car idles high at 1100 or so.
2) Rough acceleration/rough cruising
When you go at a green light, you know how you're supposed to gradually/smoothly hit the gas until you reach the position where you accelerate correctly? On my car, when you hold the gas pedal at a constant level (believe me, I'm holding it constant, not moving the pedal a millimeter), the engine surges and subsides, and I can't get constant acceleration out of it. I hate fly by wire, if it was a mechanical linkage the throttle would be forced to be stuck open at the right amount. Anyway, it makes acceleration really rough and unpredictable. It's tough in traffic, and well it's even tough anywhere I try going.
Then, when I'm cruising, I'll again be holding the gas pedal at a constant level and the engine will be rough and I can't hold the speed perfectly like I can on any other car, and this one too before it started acting up.
Both of these problems piss me off. They've been happening since I was at like 43,000 miles. And I've tried searching on this forum and all over the internet and the only solutions I've seen are 1) clean the throttle body (which I've done to no avail), and 2) buy a whole new throttle body. I've seen people's posts about how they've had to go through 3 throttle bodies and the problem persists, so the TB is obviously not the problem.
Does anyone know any real fixes that work for this? I'm a poor college student and I rely on my car to get to and from work, i can't just drop $170 on a new throttle body just to have the problem return in a few years. This issue doesn't sound isolated, I'm sure some of you have had this, I just want to know what will actually work. We all know GM really sucks and that Aveos are pieces of ****, but I rely on this paper-thin vehicle to get me from point A to point B. The car is already unsafe enough, just look at the crash test ratings, the last thing I need is for one of these problems to get me into an accident where one of my friends or I could get seriously injured just because of GM's ****. Any help is appreciated!!