So, I was under the hood checking out the placement of the coil packs, and at the rear of the Intake Manifold there was a quick puff of white smoke.

It was odd, and I have never seen anything like that. Anyone have an idea of what I may have seen, or am I losing my mind?

 

Something like short in the circuit from the coil pack harness? Not much wires behind it.

 

I did not think of an electrical spark causing it, good idea. I am replacing those anyway.

I am also thinking possibly purge valve, but no fault, from description of operation that would release vapor into the system, not the engine compartment.

 

oil or coolant drip on exhaust manifold??
Each, as well as electrical has a distinct smell.
Don't say it has no leaks either, no one will belive you, lol.

 

Haha! She leaks like a sieve.

I caught it out of the corner of my eye, and it was more vapor than smoke, I did not detect a smell coming off of it.

 

Sounds like you actually saw the gremlin that lives in yours!
I thought I'de seen alot over years working on things, ha, then I got a Discovery.

 

GD Gremlins. Throwing codes, and messing with my starter lately.

 

DIng Ding Ding! Winner!

It was coolant leaking from one of the hoses at the Throttle Body heater plate. The hose clamp on the inner tube was very loose. Going for a test drive and hoping that I do not have to redo the heater plate.

 

A loose clamp would be great!
Getting that lucky is rare.
So, what did I win?! Wait...I have my own Disco...nevermind, lol