Author Topic: Replacement carb for an 86' 350-M.  (Read 1121 times)

Offline cwest

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Replacement carb for an 86' 350-M.
« on: November 02, 2015, 09:22:06 PM »
86' K20.  Like an idiot I went and started pulling rubber vacuum hoses off of my stock 350M in the hopes of clearing some of the rats nest under the hood.  I didn't take a 'before' picture, pulled one too many, and now I'm running rich (I think).  It's idling a little rough, the exhaust went pungent, as well as some mild back firing on downshift.  Does someone have a better picture or explanation than the Haynes diagram (which I can't decipher) of how the vacuum hoses are suppose to go?   Or if there's an easier setup I should be thinking about with a new carb?
86' Chevy K20
350/SM465/np208

08' Silverado 1500 4X4 WT

Offline Chisholmcody

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Re: Replacement carb for an 86' 350-M.
« Reply #1 on: November 04, 2015, 09:00:10 PM »
I wanna say you have a vacuum leak

Causing it to run lean

There should be a under hood diagram of the vacuum line routing 


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