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03-11-2015, 06:24 PM
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#1 |
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Registered User
Join Date: Feb 2015
Location: Washingtonville ny
Posts: 179
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What is this???
Been wondering what this is. The little round piece that has the electrical connection to it. It had hoses going to it but when I checked the hoses they went to... Nowhere. New to the c10 but not new to old Chevys. ALSO, new to the forum though! Thanks in advanced guys!
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03-11-2015, 06:25 PM
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#2 |
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Registered User
Join Date: Feb 2015
Location: Washingtonville ny
Posts: 179
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Re: What is this???
Picture is sideways. Sorry!
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03-11-2015, 06:28 PM
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#3 |
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Registered User
 
Join Date: May 2014
Location: PA
Posts: 1,417
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Re: What is this???
Looks like a little pump of some sort.
__________________
1967 C10, LWB, 250, Powerglide, PS, PB, 3/4 STATIC DROP |
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03-11-2015, 06:29 PM
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#4 |
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Senior Member
Join Date: Sep 2007
Location: Albuquerque NM
Posts: 7,862
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Re: What is this???
old electric fuel pump.
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1967custom |
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03-11-2015, 06:31 PM
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#5 |
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Registered User
Join Date: Feb 2015
Location: Washingtonville ny
Posts: 179
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Re: What is this???
It does. Anyone know what it's for? I don't think its functioning. I unhooked the connector and truck runs fine. Would like to start cleaning up engine bay. Thanks!
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03-11-2015, 06:32 PM
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#6 |
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Registered User
Join Date: Feb 2015
Location: Washingtonville ny
Posts: 179
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Re: What is this???
HUH... So I can get rid of it? I have a mechanical one.
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03-11-2015, 06:33 PM
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#7 |
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Registered User
Join Date: May 2014
Location: PA
Posts: 1,417
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Re: What is this???
It's not hooked up so get rid of it. Where do the wires go?
__________________
1967 C10, LWB, 250, Powerglide, PS, PB, 3/4 STATIC DROP |
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03-11-2015, 06:33 PM
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#8 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,731
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Re: What is this???
TVS.
Transmission vacuum switch! It's a solenoid. Used to supply vacuum to your vac pot on your dizzy only when in high gear. The one wire is 12v and the other runs down to a switch on your tranny. The switch on the tranny provides a ground completing the circuit in the solenoid and allows vacuum to the vac pot. Theory was you didn't need vac advance until in high gear and cruising. |
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03-11-2015, 06:35 PM
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#9 |
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Registered User
Join Date: May 2014
Location: PA
Posts: 1,417
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Re: What is this???
Oops...sorry for steering you in the wrong direction.
__________________
1967 C10, LWB, 250, Powerglide, PS, PB, 3/4 STATIC DROP |
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03-11-2015, 06:35 PM
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#10 |
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Registered User
Join Date: Feb 2015
Location: Washingtonville ny
Posts: 179
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Re: What is this???
But the canister is hooked up to the carb. Also a manual trans.
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03-11-2015, 06:35 PM
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#11 |
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Registered User
Join Date: Feb 2015
Location: Washingtonville ny
Posts: 179
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Re: What is this???
That's alright!
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03-11-2015, 06:45 PM
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#12 | |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,731
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Re: What is this???
Quote:
Manual trans was the only one used with a tvs. Usually a 3 speed or 4 speed with side levers like the muncie 318, saginaws or muncie m20, 21 or 22. |
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03-11-2015, 06:51 PM
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#13 |
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Registered User
Join Date: Feb 2015
Location: Washingtonville ny
Posts: 179
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Re: What is this???
It's not connected to anything right now as you can see. Should I hook it up? Dizzy is hooked up to manifold vacuum on the carb. And the truck has a 3 speed!
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03-11-2015, 07:04 PM
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#14 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,731
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Re: What is this???
Take it off, box it up and advertise it on evilbay as a nos tvs for a 69 L88 vette. Should be able to get at least a gazillion bucks for it. JK!!
Running your truck without it hooked up and hooking your vac to the carb like it is now hurts nothing. How's your truck start without a choke? |
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03-11-2015, 08:47 PM
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#15 |
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Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,503
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Re: What is this???
Transmission controlled spark soleniod. Read up on pages 6T-1 and 2 in the factory service manual on how it works allowing spark advance in high gear only (3rd or 4th) on manual trans applications. Or High and reverse on automatics.
RTFM ... Read The Factory Manuals... download 'em here
__________________
Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID ** Blazer SPID ** Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders ** Do you have a 1972 Plaid Pickup? ** Plaid Blazer ** Plaid Suburban |
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03-11-2015, 09:43 PM
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#16 |
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Registered User
Join Date: Feb 2015
Location: Washingtonville ny
Posts: 179
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Re: What is this???
truck starts and runs good. and im up in new York! been cold this winter. thanks for all the replies!!
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03-12-2015, 10:40 AM
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#17 |
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Registered User
Join Date: Nov 2010
Location: Carlsbad, CA
Posts: 1,584
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Re: What is this???
I know y'all figured this out already, but the pic was giving me a headache.
__________________
- Jim - My Daily Driver is a 1969 Chevrolet Custom/20 Fleetside 350/TH400/Eaton H052 4.10 and its Project thread is here http://67-72chevytrucks.com/vboard/s...d.php?t=456911 |
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03-12-2015, 11:13 AM
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#18 |
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Registered User
Join Date: Feb 2012
Location: Smyrna TN
Posts: 1,153
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Re: What is this???
The TVS zip tied to the choke was only available from the factory on Fords! I would take it off ASAP:-)
__________________
1971 Longbed BB Cheyenne Super 1972 Longbed SB Cheyenne Super 1972 Longbed Highlander Custom Deluxe 1975 K5 4x4 full convertible Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=645165 Greg Smyrna TN |
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