When I first start my car for the day, the engine dips and stuff like crazy!
Whenever I put it in reverse the car will start to stall out.. This problem happens until I'm in gear for about 2 minutes and then the service engine soon light comes on and the car drives fine.

The two error codes I get are: 15 and 42 (If I can recall correctly).
If I have stated the wrong codes I know they are:
Temperature Sensor
and
EST error

I have replaced the sensor that the code 15 is telling me is a problem, and it hasn't fixed the problem. The car's temperature according to the gauges is fine. Could this be a thermistat problem somehow tripping the wrong codes? I've replaced the fan switch, the temp sensor on the drivers side, and the sensor on the manifold isn't that old.

As for Code 42, I think I had an EST error a while back and I am almost possitive I replaced the EST module (I'm talking about a year and a half ago).

Anyone else have these problems? How'd you fix it?

 

nobody at all has any idea??

 

Start looking for a vaccum leak.