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I have a 69 SS 350 and need my smog diverter valve rebuilt, I think. On de-acceleration or between shifts I get backfire noises out of my exhaust. I never had this before, but since re-installing my A.I.R. smog equipment now I do. Any thoughts on what is causing this? maybe the gasket between the diveter valve and the tube where it attaches is bad....? Help..... Thanks
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On a working smog set up...I think that this is normal (which is one of the reasons why everyone took them off...
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I could be wrong though...
