Hi everyone.
Here's the thing, a buddy of mine has a 1990 FC convertible. The kid was acting weird on us, he would stall up to 1.500 - 2.000 RPMs when in park position (by the way it's automatic...yay...hurray... ) the car would keep the idle that high for a long time. Then when we shut him off the engine just rotates and it doesn't want to start back on.

Could it be that He has a vacuum leak somewhere? I don't know what his compression is like.
I also noticed the oil leak underneath it, it seemed like it had some coolant

Keep in mind, the car is stock no mods done to it.

I just got a little confused, cause I been working on the Jag almost whole day....talking about lady with attitude

 

oil + coolant = new engine

 

that's what I was afraid of.