1982 454 What does this relay do?

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Overpowered

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Trying to figure out what this relay on the drivers side valve cover does. The service manual just lists it as a switch asm

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twinturbo427

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Asm = assembly

But other than that, no idea. Sorry
 

74 Shortbed

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Beats the hell out of me too..
 

78C10BigTen

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Trying to figure out what this relay on the drivers side valve cover does. The service manual just lists it as a switch asm

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Is that asm or ASi4? At least thats what im seeing. Ask @Honky Kong jr, hes fluent in BBC...
 

Honky Kong jr

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74 Shortbed

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I don't think it's a big block thing because I don't have it on mine, unless it's hidden somewhere else..
 

Honky Kong jr

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I don't think it's a big block thing because I don't have it on mine, unless it's hidden somewhere else..
The 85 454 I had, had it on valve cover. I still have the covers it might still be on it lol
 

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The 85 454 I had, had it on valve cover. I still have the covers it might still be on it lol
Strange, my 86 never had that plug there??, must be an 85 thing maybe, lol.
 

Honky Kong jr

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Let’s go Jesse what’s taking so long?
 

Overpowered

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This motor and harness are from a 1982. I'm not sure if the 85 harness has it
 

Honky Kong jr

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This motor and harness are from a 1982. I'm not sure if the 85 harness has it
These are from an 85 or 86 Winnebago
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1987 GMC Jimmy

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I don’t know what the hell that is. It looks like something out of the P30 service manual, though, and my copy’s not with me. Is this harness from a camper? Have you checked the relay for a GM part number? I don’t think it’s the fuel pressure relay because those go on the edge of the doghouse by your right foot, and they didn’t get them until mid-1984. IIRC, there was an air injection relay, but I don’t know if that’s what that is.
 

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