Engine Start-up Rod Knock Please Read

Hey Guys,

I wanted to see if anybody else has experienced this and if I should have it looked at. This has happened to me only ONCE but my warranty is ending in about 2k miles.

I had to go out of town this past weekend on Saturday morning (5am) and had to move my truck out of my driveway. I started it up cold and parked it on the street (very slight downhill grade) and turned her off. (I know cold start isn't the best but was in a rush.) Well that isn't the problem that happened to me. It was when I returned on Monday morning for work. I started the car up around 9am and noticed the engine sounded like a rod knock or the pistons were misfiring. After the noise happed for about 2 seconds it stopped and a dark cloud of smoke plumed out my exhaust. I thought for a second my truck was a diesel and I floored it!

I use my truck for work and turn it off and on throughout the day many times. I have never had this happen to me and it no longer is happening ever since this morning. Any idea what it could be or if I should be worried?

Help!

 

Nothing happened this morning do you think it was just a fluke?

 

The engine oil seemed a tad low so I added some that day. But my readings probably werent too accurate since the engine just started and was on a slant.

The smoke was a grey/blueish (oil).

 

Usually if it is blue smoke then it is either piston rings or valve seals may be worn.....