eran tomer
I'm Awesome
i have seen an air cleaner that doesn't have it. it's from an over 8500 lb emission car. does it make sense?Heat riser? My '88 had no heat riser valve. The TBI manifold has a big coolant passage that warms the manifold.
Or are you talking about the temp-sensitive door in the air cleaner snorkel? GM used to use a vacuum-operated system, but the GMT400s seem to get a wax-pellet, self-contained door and thermostat.