Dedicated to the Promotion and Preservation of American Muscle Cars, Dealer built Supercars and COPO cars. |
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#1
08-16-2009, 01:15 AM
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67 L78 3911 Carb.
Will bypassing the smog pump affect the performance of the engine/carb.? What was the GM fix for 67 smog pump/Carb backfire?
__________________
1967 IPC 4P - 1967 RS Z/28 4L 1967 RS/SS 4K 
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#2
08-16-2009, 01:28 AM
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Re: 67 L78 3911 Carb.
A faulty diverter valve or even a loose vacuum hose to the diverter valve can cause a backfire situation. The carb may not be part of the problem.
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...................... John Brown This isn't rocket surgery.....
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#3
08-16-2009, 01:52 AM
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Re: 67 L78 3911 Carb.
I am a ways from completing my 67 Z build and I was just curious if the engine would run correctly if I just ran a short bypass hose from the carbs smog inlet to outlet, therefor omitting the smog pump completely?
Pardon for not being specific. I read somewhere that GM experience backfiring problems during 67 for some reason and I have forgotten where I read this or what the corrective action was. Amen on the Grace
__________________
1967 IPC 4P - 1967 RS Z/28 4L 1967 RS/SS 4K
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#5
08-16-2009, 01:55 AM
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Re: 67 L78 3911 Carb.
oops, I am still learning my way around and I will post in the correct forum for Eric too.
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1967 IPC 4P - 1967 RS Z/28 4L 1967 RS/SS 4K
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