Carb secondary not working?

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kensmith

Carb secondary not working?

Post by kensmith »

The car has very little pickup even when I floor it. I pulled the air cleaner off and with the car not running I opened the throttle linkage all the way and I only see gas squirting down the primary. I do see the secondary butterfly start to open after about 1/2 throttle and fully open at full throttle but I don't see any squirt of gas? Thoughts?
majicwrench

Re: Carb secondary not working?

Post by majicwrench »

There is no accelerator pump for the secondaries and thus no "squirt" into the secondaries.
Keith
kensmith

Re: Carb secondary not working?

Post by kensmith »

majicwrench wrote:There is no accelerator pump for the secondaries and thus no "squirt" into the secondaries.
Keith
So how do you check to see if the secondary is working?
majicwrench

Re: Carb secondary not working?

Post by majicwrench »

If yoiu can see the throttle plate opening that is all you really need to see.
kensmith

Re: Carb secondary not working?

Post by kensmith »

majicwrench wrote:If yoiu can see the throttle plate opening that is all you really need to see.
Ok, I'm guessing gas will feed it at some point from a second gas line and jet? How would you know if it's clogged?
majicwrench

Re: Carb secondary not working?

Post by majicwrench »

For the most part, secondary jets never clog. If you really wanted to, you could watch down inside secondary with engine running and go full throttle. Is going to rev like mad and you should see fuel get pulled out of secondary venturi. However, I WOULD NOT DO THIS, why bother, rest assured, the secondary jet is not plugged. Look elsewhere
puddin

Re: Carb secondary not working?

Post by puddin »

i found most carb problems are float related-- too low too high stuck blocked or fuel filter--
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seabeelt
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Your car is a: Fiat Spider - 1971 BS1
Location: Tiverton, RI

Re: Carb secondary not working?

Post by seabeelt »

Do you know when the carb had its last overhaul??
Michael and Deborah Williamson
1971 Spider -Tropie’ - w screaming IDFs
1971 Spider - Vesper -scrapped
1979 Spider - Seraphina - our son's car now sold
1972 Spider - Tortellini- our son's current
kensmith

Re: Carb secondary not working?

Post by kensmith »

seabeelt wrote:Do you know when the carb had its last overhaul??
No, I just purchased the car a few weeks ago.
james124

Re: Carb secondary not working?

Post by james124 »

Are your spark plugs, ignition wires and distributor in good shape? Is the gas fresh and clean? Eliminate the simple remedies first. Good luck, JimmyG
kensmith

Re: Carb secondary not working?

Post by kensmith »

Will do, thanks!
So Cal Mark

Re: Carb secondary not working?

Post by So Cal Mark »

I see lots of them with secondary throttle plates stuck closed, never have seen a plugged secondary jet unless the car sat for years and the carb gummed up
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