Diesel knock disappears

[myssrhl]

Yep,,,, I stopped by Harbor Freight and bought a new stethascope.
Car was knocking like crazy at idle at stop lights.
Wanted to make sure it was an injector or the vac pump or whatever.

So drive home shut off car unwrapped new steth and restarted car.

No knock,,,,,heck smooootttthhh.

Drive to work today smootthh, cruise control started working, sun roof not as noisey.

I think it was afraid I was going to check its tail pipe.

Honest a miracle,,, or was it the "gallon" of Lucas injector treatment put into 10 gallons of fuel 2 tanks ago???

Weird,, this cars is weird.

Dave