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sb001
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Joined: May 19, 2011
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Location: NW Arkansas
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 Posted: Wed Mar 21, 2018 6:12 pm Post subject: M157 smog control code |
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I know the M157 designation was to denote smog control emissions on the respective engines. What modifications exactly did it involve? Thx
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bnam
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Location: El Dorado Hills CA/ Bangalore, India
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| Posted: Wed Mar 21, 2018 6:25 pm Post subject: Re: M157 smog control code |
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Parts manual says this:
But, I wonder if it also included throttle positioner which slowed throttle return to reduce emissions.
Byas
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busdaddy
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| Posted: Wed Mar 21, 2018 7:25 pm Post subject: Re: M157 smog control code |
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| bnam wrote: |
| But, I wonder if it also included throttle positioner which slowed throttle return to reduce emissions. |
That would be a different M code, 157 applies to the vapor recovery system only.
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sb001
Samba Member
Joined: May 19, 2011
Posts: 10406
Location: NW Arkansas
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| Posted: Wed Mar 21, 2018 7:25 pm Post subject: Re: M157 smog control code |
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Thanks! I wonder what they mean by "exhaust control system" -- if that's the charcoal canister or something else. EDIT: never mind busdaddy answered my question. 
There's a guy selling a complete long block along with intake, muffler, tins, shroud, and generator for $300 close by me-- the block is a B series with that M157 designation so just wanted to make sure it would work with my setup if I picked it up as a spare. Since it apparently has nothing to do with the engine itself I should be good. Thx all
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I'm the humblest guy on this board.
1969 autostick sedan, family owned since new
1600 SP engine
Solex 30 PICT 3 carburetor
Bosch 113905205AE autostick distributor |
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glutamodo 
The Android
Joined: July 13, 2004
Posts: 26324
Location: Douglas, WY
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| Posted: Fri Mar 23, 2018 7:32 am Post subject: Re: M157 smog control code |
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That image quote above is 14 (Ghia) by the way.
And it's wrong. There was no "vapor recovery" from the fuel tank when that code started its existence. At that time, it was the crankcase breather. I do think it was meant to include all the various USA emissions variations, like that throttle positioner.
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