help with holley 2 bbl vacuum hoses
Your son's car is what year and what model? Automatic or manual transmission? California, Federal, or Canada emissions, and with what engine compartment modifications (components removed or hacked)?
1. Cold idle enrichment valve. Used on some applications starting around 1976 or so to augment the enrichment provided by the choke during cold engine operation. Requires external equipment (thermostatic ported vacuum switch, hoses) to operate. If your car does not have a TPVS there is no harm in leaving this disconnected, though you'll have an easier time of life if you install one of the fully adjustable electric choke kits rather than the non-adjustable factory-type choke thermostat. On the other hand, if you want to hook this up and use it, it's not all that difficult.
2. Venturi vacuum tap to trigger side of EGR vacuum amplifier (the "hockey puck" looking item mounted atop the intake manifold and with a larger hose going to manifold vacuum and a medium-size hose going to the EGR valve). If you are not running EGR, cap this off securely. If you are running EGR, connect the right size hose to this and clamp it securely. A vacuum leak anywhere is bad, but a vacuum leak here will really spoil things.
3. To PCV valve.
4. To thermostatic air cleaner snorkel damper thermostat
5. Manifold vacuum tap. Make sure to plug off any nipples you're not using.
6. Bowl vent to "CARB" or "BOWL" port on charcoal cannister on '72-up cars. To appropriately-sized port on '70 California and '71 50-state/Canada cars. If not using a cannister on a car originally so equipped (dumb, use one), leave this port open to atmosphere.
7. To "PURGE" port on charcoal cannister on '72-up cars. Plug off if not used.
8. Distributor vacuum advance (looks like it's already hooked up correctly).
Your son's car is what year and what model? Automatic or manual transmission? California, Federal, or Canada emissions, and with what engine compartment modifications (components removed or hacked)?
1. Cold idle enrichment valve. Used on some applications starting around 1976 or so to augment the enrichment provided by the choke during cold engine operation. Requires external equipment (thermostatic ported vacuum switch, hoses) to operate. If your car does not have a TPVS there is no harm in leaving this disconnected, though you'll have an easier time of life if you install one of the fully adjustable electric choke kits rather than the non-adjustable factory-type choke thermostat. On the other hand, if you want to hook this up and use it, it's not all that difficult.
2. Venturi vacuum tap to trigger side of EGR vacuum amplifier (the "hockey puck" looking item mounted atop the intake manifold and with a larger hose going to manifold vacuum and a medium-size hose going to the EGR valve). If you are not running EGR, cap this off securely. If you are running EGR, connect the right size hose to this and clamp it securely. A vacuum leak anywhere is bad, but a vacuum leak here will really spoil things.
3. To PCV valve.
4. To thermostatic air cleaner snorkel damper thermostat
5. Manifold vacuum tap. Make sure to plug off any nipples you're not using.
6. Bowl vent to "CARB" or "BOWL" port on charcoal cannister on '72-up cars. To appropriately-sized port on '70 California and '71 50-state/Canada cars. If not using a cannister on a car originally so equipped (dumb, use one), leave this port open to atmosphere.
7. To "PURGE" port on charcoal cannister on '72-up cars. Plug off if not used.
8. Distributor vacuum advance (looks like it's already hooked up correctly).