1982 454 What does this relay do?

[74 Shortbed]

Well, there is an easy way to find out, unplug the POS and when something don't work, bada bing you found it, lmao..

 

[1987 GMC Jimmy]

The 454 in my P30 chassis didn’t have that either, and it was an ‘89 with the good ole oversmogged carb setup. Both relays were next to each other, though. Weird.

 

[Honky Kong jr]

Well, there is an easy way to find out, unplug the POS and when something don't work, bada bing you found it, lmao..

That’s called process of malfunction.

 

[Honky Kong jr]

The 454 in my P30 chassis didn’t have that either, and it was an ‘89 with the good ole oversmogged carb setup. Both relays were next to each other, though. Weird.

Why did the motor home engine have it? It had all kinda ******** on it. And little bitty pushrods and heads that got chucked immediately. Along with the soup bowl pistons.

 

[74 Shortbed]

That’s called process of malfunction.

Yep, and no brain strain, lol..

 

[1987 GMC Jimmy]

Why did the motor home engine have it? It had all kinda ******** on it. And little bitty pushrods and heads that got chucked immediately. Along with the soup bowl pistons.

It had the fuel pump relay to drive the lift pump, which was in the tank, because GM got too many complaints about vapor lock on their P30 motorhomes with just the mechanical pump. It was kinda complicated. You had a TBI style pump in the tank, a fuel pressure regulator near the tank, a fuel pressure relay that was driven by a 12V ignition source since no ECM, the mechanical pump, and the carburetor. I don’t know why it had the AIR relay. Maybe dual smog pumps or some kind of cobbled diagnostic circuit like the ALDL in smog pump equipped vehicles will tell you with a test light.

 

[Honky Kong jr]

It had the fuel pump relay to drive the lift pump, which was in the tank, because GM got too many complaints about vapor lock on their P30 motorhomes with just the mechanical pump. It was kinda complicated. You had a TBI style pump in the tank, a fuel pressure regulator near the tank, a fuel pressure relay that was driven by a 12V ignition source since no ECM, the mechanical pump, and the carburetor. I don’t know why it had the AIR relay. Maybe dual smog pumps or some kind of cobbled diagnostic circuit like the ALDL in smog pump equipped vehicles will tell you with a test light.

So in other words nonsensical ********?

 

[1987 GMC Jimmy]

So in other words nonsensical ********?

For the fuel pump, 'fraid not. It'd run like **** without that pump. For the AIR, yes. I just found a 1987 service manual online. If it was equipped with an electric fan, there was a fan relay, there was an AIR diverter relay, an AIR override relay, a starter motor relay... The electrical system on those motorhomes through 1989 were put together really badly. The damn things had an SES light and no computer or ALDL so if that thing got tripped, it was time to get the manual and a test light/multimeter and start pulling connectors to probe voltages. Super overcomplicated. OP, if you get a factory part number, let me know.

 

[Dougnsalem]

Ejection seat relay??? Oh wait, 82 Chevys didn't have those...

 

[1987 GMC Jimmy]

Ejection seat relay??? Oh wait, 82 Chevys didn't have those...

You’re thinking of an Aston Martin DB5.

 

[shiftpro]

I often wonder how much of that emission junk was just props to make the public think it was necessary to save our planet.
Leading to this climate change dance that at this point is creating the smoke screen to rob us of more time and energy ($),
and give up rights and eventually our personal vehicles.

 

[1987 GMC Jimmy]

I think it was done mostly to appease the government and their ********. All that trash cost the manufacturer money, which cost the consumer money, which at the same time choked down the vehicles and their respective market with emissions junk, thus pissing off Joe Blow regular consumer who liked to buy a vehicle that was peppy not sluggish. I’d like to think that the Big 3 of that time cared about the consumer a little more than now. At least with trucks and non-FWD cars. Emissions got a ton simpler when fuel injection came along, but they’ve recomplicated it now, and I think it’s the more the manufacturers’ collective M-O of make this vehicle in a way where it’ll be dead or obsolete in 10-15 years. This time it’s with computers and wires. Back then it was just with vacuum hoses and thermal switches. The difference is then you could just yank out what you didn’t want 9 times/10, and you were good to go for 45 years if you’re the oldest square body. I’d like to see the junk they crank out now last that long.

 

[Dougnsalem]

You’re thinking of an Aston Martin DB5.

Yeah, you're right. That's what I was thinking of. Easy to get those confused with our trucks, with all the mods we got going on....

 

[Big Chip]

I often wonder how much of that emission junk was just props to make the public think it was necessary to save our planet.
Leading to this climate change dance that at this point is creating the smoke screen to rob us of more time and energy ($),
and give up rights and eventually our personal vehicles.

Right on! ******* hippies.

 

[bucket]

The 454 I stuck in my C10 was from some kind of motorhome, it had that relay and pigtail still on the cover. When it warms up a bit, I'll go look out in the garage and see if I still got it. It probably had a part # on it.