DFI, Batch Fire, and other myths

[goflo at pacbell.net]

Late 80s - Early 90s BMW had a cold-engine stumble caused by intake
valve carbon build-up. Usually went away after warm-up. There are
walnut shell on-the-car cleaners which address this problem.

Jack

Bruce Plecan wrote:

> Is this fact?, or theory?.
> Bruce
> 
> >Carbon buildup on the back if an intake valve absorbs fuel.  During a
> >transition from part to full throttle, the carbon absorbs some of the added
> >fuel causing a momentary lean condition, just like a wet flow manifold.