Cliff's Quadrajet Parts and Rebuild Kits

Quadrajet Problem Solving => Diagnose a Quadrajet carburetor problem => Topic started by: bozso on May 11, 2012, 11:46:51 AM

Title: 1981 E4ME Q-jet Bad fuel economy - fast warm idle
Post by: bozso on May 11, 2012, 11:46:51 AM

Engine always idled fast when warm (1800 rpm), so removed carb, disassembled to clean, reassembled and installed, idles even faster now.  Electric choke seems to work fine, opens after just a few minutes.  Power at 12v to MC Solenoid good, and O2 sensor replaced; But, dwell at 2 degrees :(   
Aside from screwing with idle mixture screws, should additional adjustments be made "inside" carb?
After replacing several sensors, I no longer receive any "error" messages.  SES light only illuminates during start up to show it's working.
Help, please?

Title: Re: 1981 E4ME Q-jet Bad fuel economy - fast warm idle
Post by: 429bbf on May 12, 2012, 06:55:14 PM

hi bozo welcome aboard .when you had it apart did you remove all the plugs(the aluminum tappered tamper proof plugs) and tap them for screw in plugs?also did you remove the 2 little rivets to gain access to the 2 o rings on the screw?it sounds like the o rings are bad and you cant control the idle fuel.dean

Title: Re: 1981 E4ME Q-jet Bad fuel economy - fast warm idle
Post by: jjr on May 16, 2012, 07:50:14 PM

 Does it step off the high speed idle cam ok?

 Joe