Float chamber overflow

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RedSkull
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Posts: 2
Joined: Thu Jul 08, 2021 8:19 pm
Location: Austin, Tx
Model: 1500/1600
Year: High Windshield-68-70

Re: Float chamber overflow

Post by RedSkull »

I believe I must have Float Chamber overflow.
Here is my picture, but tube from front float chamber has a stream of gas going into air intake inside of air filter chamber)
download/file.php?mode=view&id=57863

Where do I start? Open up float and inspect / Clean? Just acquired a 1970 Datsun 1600 and just been out for a few drives. Yesterday was smoking a lot in exhaust as if was running to rich. (I can imagine why with gas pouring into intake. :( ) I see why this is much better than gas spill leading to fire. just starting to explore forum and thanks for all the contributions I have seen so far.

Also just added MMO into dashpot (back one looked low), and seems be running much better until gas pours into intake (takes 10-15 secs) Also cleaning air filter as it seems soaked in gas.
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DAC21
Roadster Fanatic-Site Supporter
Posts: 536
Joined: Tue Sep 15, 2020 7:44 am
Location: California
Model: 1500/1600
Year: Low Windshield-64-67.5

Re: Float chamber overflow

Post by DAC21 »

Do you not have float bowl over flow tubes / hoses feeding to the bottom of the car? That is where gas should be directed if float valves are stuck open / floats are filled with gas and don't rise in the chamber to shut off valves.
1967 1600 in waiting SPL311-09002 / R-28178
2018 Hyundai Elantra GT Sport Ultimate
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spl310
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Re: Float chamber overflow

Post by spl310 »

That is the 70 design. Open the float chamber - you likely have either a sunk float (has fuel in it), a bad float valve, or trash in the float valve.
"Wow, a Roadster!" Stuart Little

1967.5 2000
1967.5 2000
1964 1500
1964 1500
1967.5 1600
1968 chassis
2000 Durango
1995 F350 Powerstroke!
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RedSkull
Forum Newb
Posts: 2
Joined: Thu Jul 08, 2021 8:19 pm
Location: Austin, Tx
Model: 1500/1600
Year: High Windshield-68-70

Re: Float chamber overflow

Post by RedSkull »

Thanks for the tip. Sunk Float (old Brass type) two new ones on order.....
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spl310
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Re: Float chamber overflow

Post by spl310 »

Happy to help!
"Wow, a Roadster!" Stuart Little

1967.5 2000
1967.5 2000
1964 1500
1964 1500
1967.5 1600
1968 chassis
2000 Durango
1995 F350 Powerstroke!
More...