Contour Enthusiasts Group Archives Forums Modifications Duratec Maintenance Thumbs up for Barryman's B12

http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=trouble&Number=522999&page=&view=&sb=5&o=&fpart=1&vc=1

I sprayed B12 directly into the intake manifold with the engine running. It appears to have fixed the problem.