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Old 07-09-2021, 09:53 AM   #1
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Trying to locate my 1980 Winnebago Brave air cleaner/ fuel filter

This is the oldest vehicle I've owned and the first with a carburetor. I'd like to check the air filter and fuel filter since the engine sputters and stalls on long uphill drives, but I can't locate or identify either one.

The engine hose routing diagram references an air cleaner, is that the same thing? I can't identify the air cleaner either.

Looking for any advice that can help me identify or find the air filter.

Thanks
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Old 07-09-2021, 10:08 AM   #2
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The air filter is under the large round cover just above the distributor in the pic (air intake to the carb). The diagram is for engine emissions control, kinda different animal. The fuel filter is ďnormallyĒ mounted on the chassis somewhere. Follow the fuel lines and you should find it hiding. Good luck!!
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Old 07-09-2021, 10:10 AM   #3
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Spin the wing nut in the center of the air cleaner housing and lift the lid to find the air filter , both the upper ( lid ) and the lower housing probably have to come off the carb to find the fuel filter .
There could also be a filter between the engine and the fuel tank , you'll have to follow the fuel lines back to the tank to be sure.

EDIT: I see Bob , posted info while I was typing , sorry for the duplication . Once you have the whole air cleaner housing off the engine , post a picture of the carb , there maybe a filter at the carb if it's a 4BBL Quadrajet.
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Old 07-09-2021, 10:20 AM   #4
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Note , a close look at one of your pictures shows that the engine used to have a , "smog control air pump" that has been removed , and it's tubing to the exhaust system , plugged off above the drivers side valve cover .

Hopefully you don't have to pass any emissions testing to license the vehicle .
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Old 07-10-2021, 05:30 PM   #5
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Air filter replaced, fuel filter next

Thanks for your help, bob and skip. Air filter was an easy sway once you helped me recognize it, ha!

I'm busy today and tomorrow, but I will go back in Monday and get the housing off to see if the fuel filter is attached to the carburetor.

My county doesn't require emissions, so I guess that worked out. I was wondering what that cap on the driver's side was. Thanks for the context, it's all helping me understand the beast a little better.
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Old 07-14-2021, 06:28 PM   #6
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In 1980 it was a transition year for the Chevy engine in the P30 so there were 2 possible fuel filters that fit inside the inlet of the carburetor.


The old style was short while the new style was a bit longer with greater capacity. Watch out when you remove it as there may be a spring inside that can jump out at you.






Previously they used a filter similar in size to the short paper filter however it was made of sintered bronze so it had no capacity to absorb water. Note that there may be a larger filter further along the fuel line between the fuel pump and fuel tank to protect the fuel pump.



The fuel pumps were mechanical pumps bolted to the side of the engine and run off a cam. If your oil smells anything of stale gasoline then consider changing the fuel pump. Actually on a vehicle that old with a mechanical fuel pump consider replacing it anyways. The pumps only cost around $20 at places like Parts Geek.

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Old 07-15-2021, 06:36 AM   #7
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Quote:
Originally Posted by NeilV View Post
In 1980 it was a transition year for the Chevy engine in the P30 so there were 2 possible fuel filters that fit inside the inlet of the carburetor.


The old style was short while the new style was a bit longer with greater capacity. Watch out when you remove it as there may be a spring inside that can jump out at you.






Previously they used a filter similar in size to the short paper filter however it was made of sintered bronze so it had no capacity to absorb water. Note that there may be a larger filter further along the fuel line between the fuel pump and fuel tank to protect the fuel pump.



The fuel pumps were mechanical pumps bolted to the side of the engine and run off a cam. If your oil smells anything of stale gasoline then consider changing the fuel pump. Actually on a vehicle that old with a mechanical fuel pump consider replacing it anyways. The pumps only cost around $20 at places like Parts Geek.

Do yourself a favor, find an OEM fuel pump if you want to replace it. (If you can)They dont make those like they use to.. I'd keep running it myself if it works. I'd be more concerned about the condition of the fuel tank if it has been sitting for a long time.
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Old 07-21-2021, 05:40 PM   #8
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After changing the gas filter and before next gas fill-up, buy a can of Seafoam fuel system cleaner and pour into gas tank, depending on tank size it may require more than one can of Seafoam.
This will clean out the fuel system and absorb any moisture in the tank, which allows the now chemically changed moisture to pass through the engine.
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Old 07-29-2021, 03:09 PM   #9
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Thank you to everyone for your help and suggestions

Apparently my carb was starving for air, the engine was stuttering and even cut out entirely a couple times as I climbed long steep hills.

I've been driving it about 4,000 feet uphill to get to a mountain town and the performance kept getting worse until I swapped the air filter.

Made the next drive up 4,000 feet without a single stutter.

Because of this, I have decided not to replace the fuel filter yet, since everything is running better than when I bought it(knocked on wood, no worries)!

Everyone's input helped tremendously and I'm dedicated to keeping this workhorse fighting fit.

edit: I just wanted to add that the fuel pump is new.
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