New motor with idle to fast - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mntoy · 11-11-2006, 11:16 AM

I have a 74 Chevy truck (no smog) that I took a 454 our of and put in a fresh 350 with headers an Edelbrock 2101 manifold and 2102 cam with the original quadrajet from the 454. I dipped the quad and installed a $15 rebuild kit and also removed the original 36B primary rods and installed 44B primary rods. The truck starts and sounds good but the idle is to high. I can turn both the fast idle cam and idle screw all the way down and can only advance the timing to 4 BTDC at 1000 rpm. I want to set the timing around 10 btdc but the idle will be way to fast. The idle is to low at start up then creeps up after a very short time after first starting. Any ideas? or ideas how to fix what is the matter with this truck.
Thanks
Mike

84slopwaggin · 11-11-2006, 01:45 PM

It sounds like the choke needs to be adjusted.

Grande Rojo · 11-11-2006, 02:06 PM

Heres some good info.
http://www.florida4x4.com/tech/quadrajet/index.php

11-11-2006, 11:16 AM	#1
mntoy Registered User Join Date: May 2006 Location: Calif Posts: 43	New motor with idle to fast I have a 74 Chevy truck (no smog) that I took a 454 our of and put in a fresh 350 with headers an Edelbrock 2101 manifold and 2102 cam with the original quadrajet from the 454. I dipped the quad and installed a $15 rebuild kit and also removed the original 36B primary rods and installed 44B primary rods. The truck starts and sounds good but the idle is to high. I can turn both the fast idle cam and idle screw all the way down and can only advance the timing to 4 BTDC at 1000 rpm. I want to set the timing around 10 btdc but the idle will be way to fast. The idle is to low at start up then creeps up after a very short time after first starting. Any ideas? or ideas how to fix what is the matter with this truck. Thanks Mike

11-11-2006, 01:45 PM	#2
84slopwaggin Registered User Join Date: Apr 2005 Location: Ar Posts: 558	Re: New motor with idle to fast It sounds like the choke needs to be adjusted.

11-11-2006, 02:06 PM	#3
Grande Rojo paper or plastic? Join Date: Nov 2002 Location: SW Missouri Posts: 671	Re: New motor with idle to fast Heres some good info. http://www.florida4x4.com/tech/quadrajet/index.php __________________ 1967 Chevy SWB 250 http://67-72chevytrucks.com/vboard/s...d.php?t=442157 1977 Chevy SWB 454 No More 454 getting 5.3 http://67-72chevytrucks.com/vboard/s...d.php?t=310518 1977 Stepside Truck of the month winner http://67-72chevytrucks.com/vboard/s...d.php?t=135524 1965 Chevy C10 454 http://67-72chevytrucks.com/vboard/s...d.php?t=731372 1975 Dodge Power Wagon http://67-72chevytrucks.com/vboard/s...=1#post7871388

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