jtmustang

what is your iac set at as far as with the key on engine off?

and the heads u can run a strait edge across and anything under .05 is fine over that and they will need to be decked?

did u put the head gaskets on the right way?

Alero99

yep head gaskets had the word front etched in them so yea they were on right....

93 LX FiveO

this is why you have em checked out before putting them on though

little extra peace of mind can save headgaskets

mjr46

personally I think all of you are wrong pointing at the head gaskets......think about it........low vaccum and coolant in the oil.....hmmmmm........now coloant can enter oil in more places than just head gasket ....like intake gasket misinstalled....if problem didn't occur until after install and low vaccum and idle issues would point towards a huge vaccum leak and couple that with coolant in the oil.....I'd be looking at intake gaskets and surfaces there and make sure you used the correct gasket for your application...just a guess based on your symptoms..who knows I may be wrong to...could be a crack in heads or intake