holley carb adjustment

[caplbi]

have a 1992 5.7 cobra running rich. the timing is ok, i installed new plugs and wires. it has a 4bbl holley carb with a manual choke. how do i adjust the air/ gas mixture? also, it has an electronic ignition so there is no points to gap.

 

[calwldlif]

Re: holley carb adjustment

you can only adjust the idle
"mixture."
1 screw on each side of the metering block.

 

[Blk-n-Blu]

Re: holley carb adjustment

Cap, Maybe this will help.
http://www.marinemechanic.com/Workhorse/index.htm
click on Motor section and scroll down to Power tune your holley.8)

 

[bjcsc]

Re: holley carb adjustment

Was the carb replaced? If yes, make sure the jets are correct. If no, the most likely problem is that your secondary plate is open or opening when it shouldn't. At rest (not running) the secondary plate should be closed. I'm not familiar enough to know whether you have vacuum or mechanical secondaries, but check whichever for proper operation.