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Wessy · 03-26-2005, 04:42 AM

Ummmm can anyone tell me what these 2 vacuum ports are for?? I use the 3rd one at the base of the carb for the modulator valve. The port on the left is under the choke and take a 5/16th's hose. the other is on the primary metering block and looks to take about 1/4" hose. I have nothing connected to them and run the engine it seems to run fine, but after I shut off the engine smoke comes out of the larger port on the secondary side. Thanks for the help!

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03-26-2005, 04:42 AM	#1
Wessy 1st Gear Member Join Date: Feb 2005 Location: Posts: 97	Holley 4160 ?'s Ummmm can anyone tell me what these 2 vacuum ports are for?? I use the 3rd one at the base of the carb for the modulator valve. The port on the left is under the choke and take a 5/16th's hose. the other is on the primary metering block and looks to take about 1/4" hose. I have nothing connected to them and run the engine it seems to run fine, but after I shut off the engine smoke comes out of the larger port on the secondary side. Thanks for the help! Full size here! __________________ 302,Speed Pro Rings,GT40-P Heads,ARP Bolts,Roller Cam,FMS 1.6 RR’s,MSD Distributor,MSD-6A Ignition,Holley Contender Intake,Holley 4160,Autolite Pro-Race Wires,CCM Headers,FMS U