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Thread: Twin choke idle issue

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    Twin choke idle issue

    Hi all, having a bit of a do with my mk2 1600 Ghia auto crossflow carb. Its a twin choke 32/36 and was having idle and a flat spot issue when I bought it. I took the carb off today and stripped it all down (jets all out) and blew all the jets through and the orifices with carb cleaner. Replaced both diaphragms and used a new carb top and base gasket and securely tightened it down. It starts ok and revs out clean,no more flat spot anymore,but will idle for a few seconds then drop down until it nearly stalls then the idle comes back. Will do this every few seconds on idle. The only other thing I changed was a new float valve,but it revs out clean. Any ideas?

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    Re: Twin choke idle issue

    Check all vacuum hoses from inlet manifold to carb and brake booster and PCV for leaks or cracks.

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    Re: Twin choke idle issue

    Thanks, I will check those, although i did fit new vacuum pipes and made sure they were clear. I did change the float valve for the new one in the kit and set the float level. Just wondering if this may be causing flooding on idle? Might try the old float valve again.

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