Home page
SPONSOR AD

Support our Vendors!  |  Advertise Here

Topic: Does not hold idle

in Forum: C3 Engines


Already a Member?
Login
Not yet a Member?
Register for Free!

Does not hold idle (1/5)
 8/9/10 6:39pm
ossw1
Former Member

Send Private Message

Rocklin, CA - USA

Vette(s):
1970 T-Top350/350hp numbers matching 4 speed. It's a mess and 1970 Convertible 4 speed.


Joined: 4/2/2005
Posts: 484

When the engine is cold it holds idle just fine. The engine temp gets to 200 it will not hold idle at a stop. It will start if I flood the carp. What would cause this. It has a Eldbrock carp on it. Could it be the coil ignition heating up?
Our Sponsors help support C3VR
Does not hold idle (2/5)
 8/9/10 9:24pm
lukesvetteLifetime Member
Lifetime Member
Send Private Message

HOWELL, NJ - USA

Vette(s):
1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.


Joined: 5/18/2004
Posts: 6812

I don't know about the carp, but it sounds like you might be experiencing vapor lock with the carb. While she's warming up, it holds idle at say 170-180?

Does not hold idle (3/5)
 8/9/10 10:20pm
Adams' AppleLifetime Member
Lifetime Member
Moderator
Send Private Message

Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas


Joined: 11/8/2003
Posts: 20126

Which car is it?
Does sound like a fuel problem, but could also be ignition, or the distributor vacuum.


______________

Joel Adams
C3VR Lifetime Member #56    

My Link


(click for Texas-sized view!)
             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Does not hold idle (4/5)
 8/9/10 10:23pm
yostusota
Former Member

Send Private Message

York, PA - USA

Vette(s):
1969 daytona conv. all original 350 350 380 4 sp w/air..and hard top


Joined: 5/18/2010
Posts: 1518

I would check your idle mixture setting,,vacuum leaks at the throttle bar,,idle setting off choke..is it an electric choke??  Mine gets stuck once in a while-not electirc though--make sure to set the idle with the choke completely off and reset timing,,I just did a full point coil cap and rotor tune up--took a little time but once set up it will run fine..do you have power brakes?? you can lose vacuum in that system also and lean it out.  of course I am assuming that when it shuts off it restarts immediately after and runs fine as long as you apply throttle.
Rich
 


______________

My first parade at Carlisle 2010
Does not hold idle (5/5)
 8/14/10 10:46pm
ossw1
Former Member

Send Private Message

Rocklin, CA - USA

Vette(s):
1970 T-Top350/350hp numbers matching 4 speed. It's a mess and 1970 Convertible 4 speed.


Joined: 4/2/2005
Posts: 484

Sorry about getting back so late. In this months Corvette magazine in the tech nerd somebody ask the same question. He thought it might be the carb getting to hot and expanding the fuel. He suggested putting a spacer on the intake manifold. When my car dies the 70 I have to flood the carb for it to start. It does have electronic ignition. Still not sure of the problem?
Our Sponsors help support C3VR