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73-87 Chevy _ GMC Trucks => Performance => Topic started by: jc1224 on November 27, 2014, 08:13:15 pm
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hey i have been having an issue that has been driving me nuts lately. i have an 86 k20 with a 1406 edelbrock i bought new 6 months ago or so on a stock intake with the adapter plate. th400 trans so no kickdown cable. when i start the truck the fast idle always seemed a little high so ibacked the bottom screw owm the arm back and didnt appear to change it but when i put it in gear and tap the throttle its stuck at about 12-1500 rs and when i come to a stop i have to put it in neutral and rev the piss out of it. to get the idle normal. take off and repeat. i also dont really have kickdown here lately. but in the last week i have replaced the throttle cable, spring and checked dor vac leaks. the choke works properly. i drive this truck 80 miles a day so its getting annoying any where i should look?
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Sounds like the choke may not be adjusted correctly.
Are you sure you have the correct screw for the high idle adjustment?
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well i physically see the choke open when it warms, but ill try leaning it back some, and the screw should work, its the one that come on the carb
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I understand that the carb has a high-idle screw. I'm wondering if you are adjusting the right one.
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gotcha, yeah im adjusting the bottom one on the the throttle arm when you hold it at wot to get to it
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Check that nothing is causing your throttle linkage to hang up. I had a problem with that on my 1411.
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I have a 1406 and i had same problem look up adanved tuning the edlebrock on youtube ill try to get the link for you
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http://youtu.be/hoXK9tm0bWk
Here u go this helped me