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ZUKIWORLD Discussion Forum => Technical Discussion - Beginner / Repair => Topic started by: shakydoug on October 01, 2009, 07:21:33 PM

Title: secondary not opening
Post by: shakydoug on October 01, 2009, 07:21:33 PM
any hits on how to troubleshoot subject, when i hold her wide open and look down her throat the secondary is not opening. when i shove a screwdriver down the throat, this baby will come alive. Ive gotta a lotta help from this site.

double thanks to all
Title: Re: secondary not opening
Post by: fordem on October 02, 2009, 06:55:45 AM
What vehicle, what engine, what carb?

Some carbs the secondary is vacuum operated - the Aisin on my Swift works like this ...

The accelerator linkage that opens/closes the primary prevents the secondary from opening until the primary is fully opened, and will close the seconday when the primary closes - but the secondary will never open unless there is sufficient vacuum.

Check the linkage on the secondary throttle plate - make sure it's not binding (I've had this happen), and make sure that whatever portion of the primary linkage that blocks the secondary from opening to soon is functional.
Title: Re: secondary not opening
Post by: shakydoug on October 02, 2009, 08:01:42 PM
sorry, 87 sammi, 1.3 stock, diahitsu vacuum secondary,
Title: Re: secondary not opening
Post by: Rhinoman on October 05, 2009, 02:53:46 PM
It won't open with the vehicle not moving, it needs load.
Title: Re: secondary not opening
Post by: shakydoug on October 05, 2009, 06:35:35 PM
so much for doing a visual on this subject.

got a vac gage today, still hoping for end to carb saga
Title: Re: secondary not opening
Post by: shakydoug on October 07, 2009, 06:31:28 PM
The secondary vacuum pot (sic) has two vacuum line connections. when I block either one and pull a vacuum on the other one, neither connection will hold a vacuum.  Should this hold a vacuum like the rest of the vacuum pots (like the one on the distributor)? 

Also the little blue box in front of the secondary vacuum pot makes a ticking noise when the key is on, Is this normal?

It sounds like there is a vacuum leak somewhere, not sure.  Thanks for the help