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**aerotruk63** · 11-17-2014, 03:56 PM

You have a vacuum leak. Some say to use an unlit propane torch, allow the gas to flow and the motor should rev when your near the source of the leak. Is the carb sufficiently secured?

11-17-2014, 03:56 PM	#25
aerotruk63 Check The Champ, Demonstrator Join Date: Jun 2009 Location: Montreal,Quebec Posts: 6,627	Re: Anyone Using 4.1 Straight Six Engine? You have a vacuum leak. Some say to use an unlit propane torch, allow the gas to flow and the motor should rev when your near the source of the leak. Is the carb sufficiently secured? __________________ 1963 *Chevrolet Truck* Literature LINK: https://picasaweb.google.com/113840717762774560215 YouTube Channel with 20+ Original *Chevrolet Truck* Salesmen, Mechanics & Service Department Training Slideshows. https://www.youtube.com/results?sear...otruk63&page=1