Rochester 4-bbl quadrajet idle on 1978 Chevy 1/2 ton

[My78truck]

Can someone please help me. My idle is messed up/set too low. When I start my truck, it wants to stall out 3-4 times before the idle sticks. Will idle at a low rpm before ramping up to high rpm until warmed up. Can someone please provide the specs for a Rochester 4-bbl quadrajet.

Thank you

 

[GTX63]

650 or 700 rpm is a general rule of thumb. That can vary however, depending on whether the engine is stock, altitude, etc.
Without more details, it sounds moreso like a choke problem than an idle speed problem.

 

[RaisedK5]

ST_330_78_1978_Chevrolet_Light_Truck_Service_Manual

MediaFire is a simple to use free service that lets you put all your photos, documents, music, and video in a single place so you can access them anywhere and share them everywhere.

www.mediafire.com

Quadrajet starts on page 6C-33

 

[My78truck]

650 or 700 rpm is a general rule of thumb. That can vary however, depending on whether the engine is stock, altitude, etc.
Without more details, it sounds moreso like a choke problem than an idle speed problem.

Had a friend come down and he was able to get it set. Just needed a few turns of a screw here and there. Sounds like it should both at high idle and in gear. Gotta love someone who can tune by ear. Thanks. BTW, stock engine and about 500 feet above sea level. Thanks for the help.

 

[My78truck]

ST_330_78_1978_Chevrolet_Light_Truck_Service_Manual

MediaFire is a simple to use free service that lets you put all your photos, documents, music, and video in a single place so you can access them anywhere and share them everywhere.

www.mediafire.com

Quadrajet starts on page 6C-33

Thanks. I actually have an original service manual and in quickly looking through it did not find the specs until after posting. Thanks though.