Idiot need Carb Advice
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Idiot need Carb Advice
Okay, so i just switched from a Quadrajet (which i am assuming wasn't computer controlled because there was only a lead going to the Electric Choke) to an Edelbrock 1406, Because my car no longer would start and instead of rebuilding it for the umpteenth time i just trashed it. And no one please bash because i changed it out, its my car i did what i felt was best. But i digress.
Well now my car starts wonderfully on the first time, but now she's not idling and sounds really rough when i force her to idle (aka have my foot on the gas) (however she has her normal purr while accelerating), also extra smoke is coming from what i guess is the exhaust recirc lines. i was told it could be that new carb needs tuned, however, i am an idiot and can't read the tuning instructions in the manual it came with, and also wonder if it could be something else.
My Car, FYI, is a 1984 Camaro Z28 V8 5.0l G
Also this is A) My first project car and B) The first car I've done most of the work on my self, w/ minimal advice from mechanic like people; so please be easy on me.
Well now my car starts wonderfully on the first time, but now she's not idling and sounds really rough when i force her to idle (aka have my foot on the gas) (however she has her normal purr while accelerating), also extra smoke is coming from what i guess is the exhaust recirc lines. i was told it could be that new carb needs tuned, however, i am an idiot and can't read the tuning instructions in the manual it came with, and also wonder if it could be something else.
My Car, FYI, is a 1984 Camaro Z28 V8 5.0l G
Also this is A) My first project car and B) The first car I've done most of the work on my self, w/ minimal advice from mechanic like people; so please be easy on me.
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Joined: Sep 2002
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From: Cary, North Carolina
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Re: Idiot need Carb Advice
Does the car have a vacuum advanced distributor or a computerized distributor? If it's still a computer distributor, you'll need a vacuum advanced distributor.
Tuning is easy with a 1406:
Economy - With the engine running at a normal operating tempature, starting with either air/fuel adjustment screw, turn the screw in or clockwise slowly until the idle just starts to drop, then turn the screw back (counterclockwise) 1/4 - 1/2 turn. Then, adjust the other air/fuel ratio screw the same. Finally, adjust the idle screw to a desirable idle setting.
Performance - Same as economy, except you want to initially turn the screws out (counterclockwise) until the idle just starts to drop, then turn 1/4 - 1/2 turn back in (clockwise), and reset idle at desirable setting.
What is your timing set at?
Tuning is easy with a 1406:
Economy - With the engine running at a normal operating tempature, starting with either air/fuel adjustment screw, turn the screw in or clockwise slowly until the idle just starts to drop, then turn the screw back (counterclockwise) 1/4 - 1/2 turn. Then, adjust the other air/fuel ratio screw the same. Finally, adjust the idle screw to a desirable idle setting.
Performance - Same as economy, except you want to initially turn the screws out (counterclockwise) until the idle just starts to drop, then turn 1/4 - 1/2 turn back in (clockwise), and reset idle at desirable setting.
What is your timing set at?
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Joined: Jan 2000
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: Idiot need Carb Advice
Economy - With the engine running at a normal operating tempature, starting with either air/fuel adjustment screw, turn the screw in or clockwise slowly until the idle just starts to drop, then turn the screw back (counterclockwise) 1/4 - 1/2 turn. Then, adjust the other air/fuel ratio screw the same. Finally, adjust the idle screw to a desirable idle setting.
Performance - Same as economy, except you want to initially turn the screws out (counterclockwise) until the idle just starts to drop, then turn 1/4 - 1/2 turn back in (clockwise), and reset idle at desirable setting.
Performance - Same as economy, except you want to initially turn the screws out (counterclockwise) until the idle just starts to drop, then turn 1/4 - 1/2 turn back in (clockwise), and reset idle at desirable setting.
The best thing to do is follow the procedure in the book. You're not likely to find a better explanation of a carb tuning process than what Edelbrock has laid out.
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Joined: Feb 2006
Posts: 1,366
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From: St.Louis, IL
Car: 1988 Camaro
Engine: 377
Transmission: TH350; Circle D 4200 converter
Axle/Gears: Ford 9"
Re: Idiot need Carb Advice
Not really sure what the point of a "performance" idle is. I don't need a lot of performance when the car is just sitting there.
The best thing to do is follow the procedure in the book. You're not likely to find a better explanation of a carb tuning process than what Edelbrock has laid out.
The best thing to do is follow the procedure in the book. You're not likely to find a better explanation of a carb tuning process than what Edelbrock has laid out.
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