I just replaced my IAC motor this morning, completely fixed the idleing prob. didn't touch anything else, but when I got home noticed oil press. dropped alot during idle, however looks fine during normal driving...also now blows a bit of blueish smoke at take off...any suggestions as to cause and maybe cure?? I changed my oil about 3wks ago and put 5w 30 full synthetic...went back today after noticing smoke and changed again to 10w 40 full synthetic.