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Originally Posted by 77 ChevySport
Just a long shot; could it be vapor lock?? Not sure what outside temp it was when you had these problems. Been there; done that. These trucks where susceptible doing this especially under load. Chevy made an insulator to go between the carb and int. manifold to solve the problem back then. Larry  |
I thought it may have been vapour lock as well, so I removed the original air cleaner with the preheater and tube and ran one with a wider opening with the duct that pulls air from the core support. I left the end of the duct open to allow air to be forced directly in, and even with the cool temps we've had up here lately there's been no change