Rep Power: 0

Hey all, this is my first post, so I will do my best to explain the problem well.

My car started shuddering/jerking whenever I start it up. Until the car warms up, it keeps doing so until I get to 2nd or 3rd, and then it seems to be fine. When the car is warm when I start it (when I leave it for about 15 minutes or so), the shuddering isn't there and the car starts as normal. The check engine light came on once this problem started, and occasionally it will start to blink. I took it to autozone to have them test the check engine computer. They said there was a transmission warning (not sure what it was, he didn't explain it) and also 3 of the 4 spark plugs were misfiring.

Any help would be great!

Thanks!

 
Rep Power: 174

Have you looked at the spark plugs? Have you changed the oxygen sensor ever? Have you considered cleaning out your idle air control (rotary) valve?

 
Rep Power: 210

Either buy an OBD2 code reader (Amazon) or take it back to Autozone and write down the codes and post them here.

 
Rep Power: 518

Is it losing coolant?