Car threw a couple codes the other day. p0068, and p0101. and the DIC came up reduced engine power. I limped it off the interstate and trailered it home. Previously the car would start, idle way down , or just start and die. I changed pcv and plugs. Now, with a new Delco MAF sensor it has no codes, but starts to run rough at @1800 rpms while in park. Also while driving it, say I am at hwy speed and let off accelerator the rpms decline and stumble up and down about the same range. Seems to me the car runs hotter than it used to, in the third section of the guage. any ideas? maybe the converter is restricted> MAP sensor? Thanks.