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Author Topic: Electronic unit on valve cover?  (Read 8621 times)

Offline discot315

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Electronic unit on valve cover?
« on: January 07, 2011, 10:59:15 pm »
I meant to put this up months ago but kept forgetting, On the motor that was in my 1980 Chevy K10 on the driver side valve cover there was some sort of electronic unit bolted to it, and wires plugged into the back of it that went into the wiring harness. I have noo idea what it is, its still on the stock valve covers and the plugs hanging there now, What could that be? my mechanics teaceher guessed that its some sort of exhaust emissions control device?
If anyone has any ideas that would be great, lol
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1980 K10- 9" lift with 38's. 350 4speed lwb
1976 / 85 front clip K20 - 4" lift with 33's. 350 4speed lwb

Offline beastie_3

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Re: Electronic unit on valve cover?
« Reply #1 on: January 07, 2011, 11:35:41 pm »
What side is it? Check the wiring diagram in the tech section.
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Offline discot315

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  • Trevor - 1980 Chevy K10
Re: Electronic unit on valve cover?
« Reply #2 on: January 08, 2011, 12:33:31 am »
Its on the driver side valve cover closest to the steering column. and yeah I looked for a bit but couldnt really find anything, and I have no idea where the wires go they just disapear into the wire harness
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1980 K10- 9" lift with 38's. 350 4speed lwb
1976 / 85 front clip K20 - 4" lift with 33's. 350 4speed lwb

Offline beastie_3

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Re: Electronic unit on valve cover?
« Reply #3 on: January 08, 2011, 12:48:57 am »
Take a pic unless someone replies sooner.
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Offline discot315

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Re: Electronic unit on valve cover?
« Reply #4 on: January 08, 2011, 12:54:47 am »
Ok il get a picture, it might take a day or 2 to get one its on my old motor sitting in the shop but il upload one asap. Thanks
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1980 K10- 9" lift with 38's. 350 4speed lwb
1976 / 85 front clip K20 - 4" lift with 33's. 350 4speed lwb

Offline discot315

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Re: Electronic unit on valve cover?
« Reply #5 on: January 11, 2011, 11:54:35 pm »
Heres the pics of the thing on my valve cover.  (the valve cover is on the motor backwards by the way)
anyone have any idea what it is?
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1980 K10- 9" lift with 38's. 350 4speed lwb
1976 / 85 front clip K20 - 4" lift with 33's. 350 4speed lwb

Offline beastie_3

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Re: Electronic unit on valve cover?
« Reply #6 on: January 12, 2011, 12:02:17 am »
If the valve cover is on backwards, shouldn't it be on the passenger side? Check around your passenger side firewall for the plug. It looks like the heater relay.
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Offline discot315

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  • Trevor - 1980 Chevy K10
Re: Electronic unit on valve cover?
« Reply #7 on: January 12, 2011, 12:11:46 am »
No its supposed to be on the driver I just mean its not pointing the way it was when I got the truck, its supposed to be pointing the plug side to the firewall, the plugs hanging there in my truck. Should I have it in there?
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1980 K10- 9" lift with 38's. 350 4speed lwb
1976 / 85 front clip K20 - 4" lift with 33's. 350 4speed lwb

Offline Jim Rockford

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Re: Electronic unit on valve cover?
« Reply #8 on: January 12, 2011, 07:44:55 am »
Shouldn't be bolted to the cover regardless. Look around the firewall for emply holes . Chevy never bolted anything to the top of the old style covers.
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1973 k20 Camper special
1980 k20 custom deluxe
2004 Crown Vic LX sport

Offline VileZambonie

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Re: Electronic unit on valve cover?
« Reply #9 on: January 12, 2011, 11:30:31 am »
EFE relay and yes it was bolted to the valve cover from the factory.
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Jim Rockford

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Re: Electronic unit on valve cover?
« Reply #10 on: January 12, 2011, 07:26:45 pm »
New one on me, I've been around SBC's for over 30 years and have never seen anything bolted to a valve cover. but you learn something new everyday. I didn't see the Tab that was spot welded to the cover that the relay is bolted to I thought it was bolted through the cover.
« Last Edit: January 12, 2011, 07:28:42 pm by Jim Rockford »
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1973 k20 Camper special
1980 k20 custom deluxe
2004 Crown Vic LX sport

Offline VileZambonie

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Re: Electronic unit on valve cover?
« Reply #11 on: January 12, 2011, 07:43:07 pm »
Quote from: Jim Rockford on January 12, 2011, 07:26:45 pm
but you learn something new everyday.

True statement. I say that almost every day!
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,                           ___ 
                         /  _ _ _\_
              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline discot315

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  • Trevor - 1980 Chevy K10
Re: Electronic unit on valve cover?
« Reply #12 on: January 13, 2011, 12:11:55 am »
haha ok thanks you guys, whats a EFE relay do??
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1980 K10- 9" lift with 38's. 350 4speed lwb
1976 / 85 front clip K20 - 4" lift with 33's. 350 4speed lwb

Offline Jim Rockford

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Re: Electronic unit on valve cover?
« Reply #13 on: January 13, 2011, 09:05:14 am »
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1973 k20 Camper special
1980 k20 custom deluxe
2004 Crown Vic LX sport
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