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  VW Parts Catalog > Carbs & Fuel System >

Weber DFEV, IDA and IDF Throttle Stop Screw Spring (Idle Speed Screw Spring) (Also DCNF, DFEV, ICT, and IDA Idle Mixture Screw Spring), 47600.007
Weber DFEV, IDA and IDF Throttle Stop Screw Spring (Idle Speed Screw Spring) (Also DCNF, DFEV, ICT, and IDA Idle Mixture Screw Spring), 47600.007
 
Weber DFEV, IDA and IDF Throttle Stop Screw Spring (Idle Speed Screw Spring) (Also DCNF, DFEV, ICT, and IDA Idle Mixture Screw Spring), 47600.007 prevents adjusting screws from moving due to engine vibration. Owners often put a new spring on when replacing their screws.

Proper idle settings are achieved by fully warming up the engine, set your ignition timing, then sync the carbs. Next adjust idle mixture, then idle speed, idle mixture, idle speed, and idle mixture. At this point you are likely not changing anything and you are done!

To set idle mixture, turn the idle mixture screw to fastest idle speed. it's best to turn it in too far 1 bbl at a time (bottom it out lightly, idle speed will drop as you lose a cylinder), and as you turn it out the cylinder will come back, picking up idle speed. Set for fastest idle, + 1/2 turn out (richer). The extra 1/2 turn makes for a more STABLE idle (not a better one).

Note that any time you change the idle speed, carb sync, idle jet size, or ignition timing, you must re-set the idle mixture!

Price: $3.95
Item eligible for Econo/1st Class Mail shipment, min ship charge applies


: 47600.007


QTY:
Overview
 
Weber DFEV, IDA and IDF Throttle Stop Screw Spring (Idle Speed Screw Spring) (Also DCNF, DFEV, ICT, and IDA Idle Mixture Screw Spring), 47600.007 prevents adjusting screws from moving due to engine vibration. Owners often put a new spring on when replacing their screws.

Proper idle settings are achieved by fully warming up the engine, set your ignition timing, then sync the carbs. Next adjust idle mixture, then idle speed, idle mixture, idle speed, and idle mixture. At this point you are likely not changing anything and you are done!

To set idle mixture, turn the idle mixture screw to fastest idle speed. it's best to turn it in too far 1 bbl at a time (bottom it out lightly, idle speed will drop as you lose a cylinder), and as you turn it out the cylinder will come back, picking up idle speed. Set for fastest idle, + 1/2 turn out (richer). The extra 1/2 turn makes for a more STABLE idle (not a better one).

Note that any time you change the idle speed, carb sync, idle jet size, or ignition timing, you must re-set the idle mixture!


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