71 Lt-1 Emissions System

[Mark A.]

Where Can I Find A Flow Chart For The Components Of The Emissions System? I Would Like To Know How The Carb, Fuel Cannister, Air System, Etc, All Work Together. Any Help Would Be Appreciated. Mark

[Joe L.]

Re: 71 Lt-1 Emissions System

Where Can I Find A Flow Chart For The Components Of The Emissions System? I Would Like To Know How The Carb, Fuel Cannister, Air System, Etc, All Work Together. Any Help Would Be Appreciated. Mark

Mark------


I think the best description you're going to find in a commonly available reference will be in the 1971 Chevrolet Chassis Service Manual. You might find a better description in an old edition of a Mitchell's Emission System Manual, but I don't know where you'd find one of those.

[Mark A.]

Re: 71 Lt-1 Emissions System

Thank You Joe, Mark

[Mike E.]

Re: 71 Lt-1 Emissions System

Jack Humphrey wrote an excellent article on the CEC system for 71's in a recent Restorer article. That's the best resource I've found. A second really good resource i(one which Jack drew from)is an 8 1/2 by 11 booklet (one of a series in 1971) entitled "Theory and Diagnosis--Chevrolet Emission Controls". It's GM ST 343-71. I see them on ebay fairly regularly.