general problems of the 2006 Buick Rainier

I had involved car acciedent which from they called throttlebody due to (tps. . . Shift by wire) you can find in ask. Com encyclopedia *(see bottom) that I expienced which I had. It was running in revese and hit steel post that protect gas meter while I tried brake but engine and tranny was in full idle and I tried change to into drive while it still in full idle and my brake cant stop until I hit emergery brake and turn engine off by key switch. I did some reserch and found I'm not alone and my insurance (national general which used be gmac) pushed my car into totalled that they used by nevada law and body shop trying to send this car to dealer for testing but never happen cuz of totalled processing. Which leave me puzzled and found out that my car sold to body shop and repaired and sold other people. My worry is if they not testing throttle and other people who bought this car may face risk which I had. *disadvanages the cost of dbw systems is often greater than conventional systems. That fall under the category of safety critical systemswhich are recommended to be developed under standards like iso 26262 which require extensive changes in the developent process generally taken for developing other traditional systems. .

There are two kinds of problems I brought to the attention of the service department several times since purchasing the vehicle but mechanics still cannot find what is causing the problems. First, my vehicle stutters when I back up and turn slowly or turn forward slowly. It does not do it every time, just occasionally so the mechanics do not experience it. Second, when stopped at a red light for a few seconds, my car feels like it has been hit in the back but when I look back to see if I've been bumped, there is no vehicle behind me. It feels like the powertrain or engine wants to jerk forward. I've taken it to the dealership twice and they say they have fixed the problem, but it continues.