Electric manifold heater- T/1,T/2,T25,Karmann Ghia,Type 312V 19W+ 10% (6. 6 Ohm) If your engine fails to idle in chilly weather your inlet manifold might be freezing up. Temperatures do not have to go below freezing point to get this situation. With the acceleration of your gas mixture, it can "freeze" up your inlet manifold because the air is simply cold, too cold. That makes your gas mixture to shrink and poor filling of your combustion chambers. Clogged preheater pipers on your manifold, incorrect warm