Ported EGR System
Ported type EGR valve is operated from carburetor vacuum port. It is fully closed with vacuum less than 2 in. Hg. It starts to open above 2 in. Hg and is fully open when more than 8.5 in. Hg vacuum is applied. See Figure.
Ported type EGR valve is operated from carburetor vacuum port. It is fully closed with vacuum less than 2 in. Hg. It starts to open above 2 in. Hg and is fully open when more than 8.5 in. Hg vacuum is applied. See Figure.