Well, this is for a 2006 WRX 4EAT.
Car has 50k on it, and other than this issue, everything runs great. No burning oil, still gets full boost, and still feels great. No hesitation or mis while driving.
My only SLIGHT issue is at idle. This could be while in park, or even in D not moving(on the brake). When it is in park, the idle sits STILL at the middle line, maybe a tad past but not much(again it is still). When in D and not moving, it drops down a tad, and slightly lower the middle line. Again both idles are still, but every now and again, you feel a slight hesitation/burp(more when it's cold start). Once it warms up, it is less often/less noticable. Motor sounds fine/normal, but every now and again, you will feel a slight hickup in your seat. Again this is very slight, and maybe not an isseu, I just want to make sure though.
What could this be?
Again car has 50k. Just purchased the car and have no clue what was done in the past. I changed the air filter, oil and oil filter. Other than a STI catback, car is bone stock.
Any ideas guys?
Thanks in advance