Carb Help Quick Please - The 1947 - Present Chevrolet & GMC Truck Message Board Network

orange72350 · 08-15-2003, 08:03 PM

on a quadrajet, how far should the air screws be turned out on the bottom of the carb? i have mine set to about 2.5 turns out, and it seems really rich. which way do i turn the screws to lean out the mixute? thanx fer all tha help guys
dale

JimKshortstep4x4 · 08-15-2003, 08:08 PM

A good starting point for the idle jets is to turn them in until they stop, (gently) and then back them out 1 1/2 - 2 turns. There are things that can affect the idle, vacuum leaks, timing, carb leaks, etc. but the settings will work as a start.

Jim

orange72350 · 08-15-2003, 08:09 PM

'wicked. thanx alot man. im gonna go try right now
thanx dale

08-15-2003, 08:03 PM	#1
orange72350 Registered User Join Date: Jan 2003 Location: Cold, Snowy High Level, Alberta Canada Eh Posts: 394	Carb Help Quick Please on a quadrajet, how far should the air screws be turned out on the bottom of the carb? i have mine set to about 2.5 turns out, and it seems really rich. which way do i turn the screws to lean out the mixute? thanx fer all tha help guys dale __________________ 2003 yamaha raptor. Stock, but it still hauls!!!! 2000 skiddo mxz 700. Camoplast 1.5 inch track, jaws twin pipes, b+b can, custom built and weighted clutch, wiseco piston, high comp heads. its very fast. wow. 72 c-10 longbox. Bright Orange. Brand new 350, rv cam, performer intake, qjet, headers, 2 1/2 inch exhaust into hooker areo chamber mufflers. Body work coming soon. "dont let yer mind wander, its to little to go places by itself." "Forget the herse, cause i'll never die"-ACDC Back In Black "If It's To Loud, Yer Just Too Old" "I Love Anything Fast Enough To Do Something Stupid In" "Instant idiot, just add beer!!""

08-15-2003, 08:09 PM	#3
orange72350 Registered User Join Date: Jan 2003 Location: Cold, Snowy High Level, Alberta Canada Eh Posts: 394	'wicked. thanx alot man. im gonna go try right now thanx dale __________________ 2003 yamaha raptor. Stock, but it still hauls!!!! 2000 skiddo mxz 700. Camoplast 1.5 inch track, jaws twin pipes, b+b can, custom built and weighted clutch, wiseco piston, high comp heads. its very fast. wow. 72 c-10 longbox. Bright Orange. Brand new 350, rv cam, performer intake, qjet, headers, 2 1/2 inch exhaust into hooker areo chamber mufflers. Body work coming soon. "dont let yer mind wander, its to little to go places by itself." "Forget the herse, cause i'll never die"-ACDC Back In Black "If It's To Loud, Yer Just Too Old" "I Love Anything Fast Enough To Do Something Stupid In" "Instant idiot, just add beer!!""

08-15-2003, 08:08 PM	#2
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	A good starting point for the idle jets is to turn them in until they stop, (gently) and then back them out 1 1/2 - 2 turns. There are things that can affect the idle, vacuum leaks, timing, carb leaks, etc. but the settings will work as a start. Jim



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