can you manually adjust the idol on the Rochester carb for a 350 small block?


Asked by Nov 21, 2012 at 05:18 AM about the 1981 Chevrolet Corvette Coupe

Question type: Maintenance & Repair

My '81 has high idle speed and will not kick down. Choke light stays on dash.
1200-1800rpm range. Thank you.

6 Answers


Its not the idle. You choke is sticking and keeping you at a fast idle. Yes you can adjust idle speed, but that will only act as a crutch to your problem. Repair or disable the choke.

2 of 2 people found this helpful.

No, do not disable the choke, you will have hard start problems and the air fuel ration will be out of sinc. These are the first computer control carbs for the Corvette. Either have it rebuilt by a shop that knows the style of carb or buy a new /rebuilt from any Corvette parts supplier like Corvette Central, Ecklers, etc.

2 of 2 people found this helpful.


1 of 1 people found this helpful.

Yes the mixture screws are covered in a steel cap that was cast into the base so to speak. Special tool required ti drill the area around the cap and remove so they can be adjusted.

3 of 3 people found this helpful.

Thx guys...all helpful hints...found that elect. choke was still ok, but insufficent voltage preventing activation. Sorted out the voltage issue and she now idles at 600rpm...nice work.

3 of 3 people found this helpful.

Glad to know she's running again....

1 of 1 people found this helpful.

Your Answer

Add photo

Related Questions


Looking for a Used Corvette in your area?

CarGurus has 20,753 nationwide Corvette listings starting at $3,000.


Search Chevrolet Corvette Questions

Chevrolet Corvette Experts

#1 John Carson
John Carson
Reputation 2,240
#2 Vincent Parker
Vincent Parker
Reputation 1,390
#3 carGrrl
Reputation 1,370
View All

Related Models For Sale

Used Chevrolet Camaro
225 Great Deals out of 30,943 listings starting at $1,217
Used Ford Mustang
476 Great Deals out of 45,735 listings starting at $1,999
Used Dodge Challenger
184 Great Deals out of 24,169 listings starting at $8,800
Used Porsche 911
94 Great Deals out of 4,510 listings starting at $9,995
Used Dodge Charger
405 Great Deals out of 28,172 listings starting at $1,988
Used Ford F-150
2,194 Great Deals out of 206,316 listings starting at $1,499
Used Mercedes-Benz SL-Class
42 Great Deals out of 2,825 listings starting at $3,500
Used BMW 3 Series
974 Great Deals out of 31,729 listings starting at $1,000

Used Cars For Sale

2017 Chevrolet Corvette For Sale
5 Great Deals out of 10,513 listings starting at $46,241
2016 Chevrolet Corvette For Sale
7 Great Deals out of 1,452 listings starting at $44,775
2015 Chevrolet Corvette For Sale
4 Great Deals out of 683 listings starting at $40,999
2014 Chevrolet Corvette For Sale
5 Great Deals out of 810 listings starting at $39,990
2013 Chevrolet Corvette For Sale
10 Great Deals out of 389 listings starting at $24,975

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.