Jump to content

IGNORED

I think I'm missing the carburetor fast idle set screw


Jeff Berk

Recommended Posts

Hi all,

I have a '74 260z with a 280 engine/5-sp manual that I purchased a few months ago. In the early 80's, a triple carb system was installed in it. Then around 2010, it was changed back to a dual SU carb system. I was trying to adjust the carburetors and could not locate the fast idle screw.  After some digging on the internet, I think it's missing (see second picture), maybe during the switch back to dual carbs and the addition of the nifty bolt as a vacuum plug. Is this something I can easily fabricate out of a triangle of thick sheet metal with three holes, a screw for adjusting and maybe a spring around the screw? If not, anyone can suggest a source for this missing part?

Also while I'm at it... The first picture is of the bottom of one of the carbs. Is the knurled nut just below the carb the air/fuel ratio adjuster? 

Thanks!

Jeff

IMG_0394small.jpg

IMG_0388small.jpg

Edited by Jeff Berk
pictures were switched
Link to comment
Share on other sites


Yes it is missing. Yes that is the adjustment for the Fuel mixture. 

Post a WTB thread in in the parts wanted. If that doesn't pan out you may get lucky and Ztherapy has one. I was missing a single choke cable collar and they had it. 

What air filter and velocity stacks are those?

Edited by JSM
Link to comment
Share on other sites

JSM... Thanks for the info. I have no idea where the velocity stacks originated from. I had to wrap the ends of them with self-vulcanizing electrical tape to build up their diameters so that I could install an air cleaner. The Air cleaner/filters were just inexpensive universal units I purchased from Autozone. I know it was jerry-rigged but less so than that of the PO.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...

Important Information

By using this site, you agree to our Privacy Policy and Guidelines. We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.