running rich? - Pontiac GTO Forum
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post #1 of 9 (permalink) Old 12-06-2014, 06:15 PM Thread Starter
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running rich?

A mechanic I know told me my Goat was running rich.
How would ya tell and what would I do to correct it?

Thanks as always
Tk
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post #2 of 9 (permalink) Old 12-07-2014, 09:05 AM
 
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check the plugs. wet, sooty, black? a nice burn they will be the color of nestle's quick cocoa mix. check choke operation, adjust air mixture screws n set idle to specs.
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post #3 of 9 (permalink) Old 12-07-2014, 10:16 AM
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Does it sting your eyes when you stand behind it? Did you adjust the mixture at idle? When is it running rich....at idle or at cruise? Did your mechanic use a gas analyzer to check the tailpipe readings (the best way to determine mixture and what mechanics do)....
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post #4 of 9 (permalink) Old 12-07-2014, 09:59 PM
 
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Black smoke, foul smell,
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post #5 of 9 (permalink) Old 12-08-2014, 06:33 AM
 
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Has anyone installed a fuel/air ratio sensor, and if so, is there a favorite? I see 'em on Summitracing for ~$200, wonder if it'd be worth it for actual street conditions tuning purposes.
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post #6 of 9 (permalink) Old 12-08-2014, 12:38 PM
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Garage
I have. I bought an Innovate LM-2 system. It's not one that you leave in the car all the time (well, I guess you could but it would be somewhat ugly...).

I like it. The only problem I've had with it is getting a reliable tach reading on the data logger function from my HEI.

Bear

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post #7 of 9 (permalink) Old 12-09-2014, 11:26 AM Thread Starter
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Dosnt sting my eyes at all. I have never messed with the carb adjustments. The settings are still as when 1st out of the box. there's no black smoke. or foul odor, I kinda like the smell of burnt 100 LL.
The plugs wernt oily before the motor spun a bearing and I rebuilt it. I do have an electric choke.
scratches head.
thanks as always and happy holidays!
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post #8 of 9 (permalink) Old 12-09-2014, 11:57 AM
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Well, it all boils down to your 'mechanic'. And his qualifications. And what you want and expect. A lot of the race guys are using O2 sensor technology on the other forum and it really helps them tune their engines optimally for power and longevity under real world conditons. Not a bad idea at all, if you don't have access to a 5 gas analyzer at the shop.
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post #9 of 9 (permalink) Old 12-10-2014, 05:01 PM
 
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Quote:
Originally Posted by Topkat View Post
Dosnt sting my eyes at all. I have never messed with the carb adjustments. The settings are still as when 1st out of the box. there's no black smoke. or foul odor, I kinda like the smell of burnt 100 LL.
The plugs wernt oily before the motor spun a bearing and I rebuilt it. I do have an electric choke.
scratches head.
thanks as always and happy holidays!
I assume you purchased a new or rebuilt carb? the mixture screw settings out of the box are just an initial setting to start the car, run to full operating temperature. then you do your fine tune adjustments to the carb. listen to the motor and use a quality timing light that has a tach to watch the rpms. when you make your adjustments, do alittle at a time n be patient n wait for a change to obtain best idle. set idle screw to specs n make final check to mixture screws.
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