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

crigglybits
20

Asked by crigglybits 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

Andrew Olsen
5,985

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 out of 2 people think this is helpful.
tcxd40
215

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 out of 2 people think this is helpful.
Denis Sagendorf
365

YO TCXD40; HADN'T MANUFACTURERS STARTED THAT ADJUST & SEAL THE SET SCREWS BULL ABOUT THAT TIME??

1 out of 1 people think this is helpful.
tcxd40
215

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 out of 3 people think this is helpful.
crigglybits
20

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.

1 out of 1 people think this is helpful.
tcxd40
215

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

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Corvette
Looking for a Used Corvette in your area?
CarGurus has 9,841 nationwide Corvette listings starting at $3,500.
ZIP:

Search Chevrolet Corvette Questions

Chevrolet Corvette Experts

#1 carGrrl
carGrrl
Reputation 860
#2 Tom Demyan
Tom Demyan
Reputation 740
#3 littlehorn
littlehorn
Reputation 530
View All

Related Models For Sale

Used Chevrolet Camaro"
680 Great Deals out of 28,142 listings starting at $2,399
Used Ford Mustang"
1,068 Great Deals out of 23,405 listings starting at $950
Used Porsche 911"
117 Great Deals out of 3,209 listings starting at $12,995
Used Dodge Challenger"
335 Great Deals out of 15,616 listings starting at $13,398
Used Dodge Charger"
824 Great Deals out of 30,141 listings starting at $2,950
Used BMW 3 Series"
1,452 Great Deals out of 34,086 listings starting at $1,900

Used Cars For Sale

2014 Chevrolet Corvette For Sale
19 Great Deals out of 1,982 listings starting at $52,985
2013 Chevrolet Corvette For Sale
25 Great Deals out of 404 listings starting at $32,999
2012 Chevrolet Corvette For Sale
19 Great Deals out of 298 listings starting at $31,500
2011 Chevrolet Corvette For Sale
21 Great Deals out of 337 listings starting at $28,891