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02-08-2012, 09:58 PM
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#1 |
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Registered User
Join Date: Jan 2012
Location: Napa cal.
Posts: 30
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What is it ?
Does anybody know what this thing is ? and how it works.
Thanks.
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Brian. '70 GMCHEVY '51 chevy "tin woodie wagon" IF YOUR CONFUSED I'LL USE smaller WORDS! |
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02-08-2012, 10:05 PM
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#2 |
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Senior Member
 
Join Date: Oct 2009
Location: Godley, TX
Posts: 17,945
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Re: What is it ?
isn't that your egr valve? As for how it works, that would be classified as black magic...
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02-08-2012, 10:15 PM
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#3 |
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Registered User
Join Date: Dec 2007
Location: Nanaimo B.C.
Posts: 604
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Re: What is it ?
emissions? I belive it changed the timming under certain driving conditions
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I was hooked on these trucks since 1982 when I drove my budys fathers 1968 Custum GMC 396 automatic dana 60 rear with a power lock diff what a ride more fun then we will we can ever tell!! |
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02-09-2012, 12:52 AM
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#4 |
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Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,119
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Re: What is it ?
It's an emission part, It went inline in the vacuum line to the distributer, I believe it retarded the timing to keep the engine from dieseling when shutting it off.
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My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html |
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02-09-2012, 12:57 AM
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#5 |
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Registered User
Join Date: Jan 2012
Location: Chula Vista, CA
Posts: 109
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Re: What is it ?
Good answer.
Thanks
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Why can't I find it until the last place looked? 65 Longbed 283 three on the tree. 66 Longbed 292 three on the tree.Pennys A/C Trucks made in USA Buy a much as you can, Made in the USA |
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02-09-2012, 01:09 AM
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#6 |
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Registered User
Join Date: Jan 2012
Location: Glencoe Alabama
Posts: 510
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Re: What is it ?
I didn't know what it was either.... I threw mine away.
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72 Cheyenne super 10 08 3500 HD 4dr dually 12 ford flex (wifes ride) 76 Monte Carlo 83 Chevy short wide Silverado 96 Mazda Miata, 2000 Allegro Bus |
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02-09-2012, 01:39 AM
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#7 |
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Registered User
Join Date: Jan 2012
Location: Napa cal.
Posts: 30
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Re: What is it ?
Thanks guys, It was hooked up with my old carb, vacuum lines and all. The new carb vacuum lines I ran direct to the distrubutor and pcv valve, then plugged all others. Now I just have to find where the wires come from so I can eleminate them.
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Brian. '70 GMCHEVY '51 chevy "tin woodie wagon" IF YOUR CONFUSED I'LL USE smaller WORDS! |
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02-09-2012, 11:33 AM
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#8 |
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Registered User
Join Date: Apr 2006
Location: East Sooke B.C. Canada
Posts: 543
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Re: What is it ?
People that like to guess should tell you they are guessing. It is a selenoid that controles the vacume advance on vehicles with transmision controled spark. It would also alow vacume advance if the engine started running too hot.
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02-09-2012, 11:48 AM
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#9 |
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Registered User
Join Date: Jan 2009
Location: San Antonio, Texas
Posts: 1,374
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Re: What is it ?
I believe thats part of the TCS, transmission controlled spark system - a smog control. The vast majority of these I've seen referred to on the board were disconnected at some point in the distant past, including mine.
Those wires should run to a TCS relay under the dash by the fuse block.
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1972 C10 LWB, 350/350 Deconstruction began 5/2009, mostly completed restoration, 5/2017 |
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