I am not sure whats going on but after running around and when I come to put the car in park my engine seems to rev up and down for a couple of seconds and then it levels out. It only does this after I put into park. Does anyone have any info on this? Also the other problem, I noticed is I recently charge my ac unit and now every now and then if Im just idiling at a light my car will shudder for a second and loose rpm's and then smooth out again.

If anyone has any info regarding this please let me know
Thankyou
Jason

 

Well to be honest, the solution I am about to offer probably is not going to resolve the specific issues you have since you are releating it to Park Idle and AC useage.

But generally speaking, if the car is idling rough I would do the following:

1. Swap Fuel Filter
2. Replace Coils and Plugs
3. Check Air Filter
4. Check Throttle Cable for tightness

 

Read codes and post them.