81mako
Thread Starter
6th Gear
Joined: Feb 2007
Posts: 6
Likes: 0
From: Vancouver
81mako
hi everyone, i have a problem and im hoping that one of yous may be able to help me out. anyways i own a 81 vette, and a few weeks back well my wife was driving home she came out started it up and it was idling high and she wasnt able to kick it down so she drove it home that way. now when i start it up it still idles high and wont kick down, and its blowing black smoke, ive checked the pvc valve, and replaced the egr valve today and still the same. one thing i have noticed is it idles better with out the air breather on. so any ideas that i may be able to try, im not all that mechanically inclined but rite now im willing to give it a try
thx all
thx all
Safety Car
Joined: Nov 2004
Posts: 4,359
Likes: 57
From: Mundelein Illinois
Suunds like the choke is sticking.
A choke that comes off too late could exhibit one or more of the following symptoms: black smoke from tail pipe, poor driveability when cold, poor gas mileage, misses, or rough idle.
A choke that comes off too late could exhibit one or more of the following symptoms: black smoke from tail pipe, poor driveability when cold, poor gas mileage, misses, or rough idle.
Thread Starter
6th Gear
Joined: Feb 2007
Posts: 6
Likes: 0
From: Vancouver
oh by the way thanks for any help you can offer me.
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,116
From: Crossville TN
You need to get the "Troubleshooting" tips for that carburetor. It is a different "animal", with the electronics interface. Maybe someone here on the Forum can supply a copy; or look on the web for info. Good luck. {P.S. sounds like a sensor malfunction or possibly wiring connection fault}
Safety Car
Joined: Nov 2004
Posts: 4,359
Likes: 57
From: Mundelein Illinois
Here is the info from the 1981 Chevrolet Corvette shop manual. This what i would go by. Hope you can read it. If not PM a fax number and I can fax it to you.
I think I need to fax it too you
I think I need to fax it too you
Thread Starter
6th Gear
Joined: Feb 2007
Posts: 6
Likes: 0
From: Vancouver
hi and thanks again for replying back to me. i have a haynes book that i use as reference, but i find its not very detailed when it comes to the carb, and seeing that no one has touched it but myself since this problem occured and i haven't adjusted anything on it. and that possibly its just the choke sticking. well lets say thats what im hoping it is.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
