Carb troubles?
Thread Starter
7th Gear
Joined: Jul 2014
Posts: 7
Likes: 0
Carb troubles?
hello,
i have a 1968 corvette 327. it is all stock with the exception of an edelbrock 2101 performer intake. it is timed to 4 BTDC and idle 850 RPM. Here's the issue, it will idle and sounds great, but when i put it in gear, idle drops and dies. forget about it moving, because that's not gonna happen. i've heard it could be a vacuum leak. when i unplug the vacuum hose from the distributor to the carb, nothing happens. suggestions? it's driving me crazy! thanks to all...
i have a 1968 corvette 327. it is all stock with the exception of an edelbrock 2101 performer intake. it is timed to 4 BTDC and idle 850 RPM. Here's the issue, it will idle and sounds great, but when i put it in gear, idle drops and dies. forget about it moving, because that's not gonna happen. i've heard it could be a vacuum leak. when i unplug the vacuum hose from the distributor to the carb, nothing happens. suggestions? it's driving me crazy! thanks to all...
Drifting
Joined: Aug 2013
Posts: 1,263
Likes: 512
From: perth Aus w.a
2020 Corvette of the Year Finalist (stock)
C3 of Year Winner (stock) 2019
Most of your vacuum comes from your inlet manifold for wiper door head lights .So try blocking that off at your manifold and see how it runs 
Burning Brakes
Joined: Apr 2013
Posts: 926
Likes: 2
From: Castle Rock CO
I would inspect all your vacuum lines and like the other dude says the vacuum to the headlights comes off of your intake manifold. If you have a leak anywhere in the system it could cause the engine to stall. If one of your headlights has a leak it will effect your engine at the manifold.
One of the things I love about my 1977 it will raise the Passenger Side Headlight when I start the car and Blink at me LOL My 1977 has a release under the dash to reduce the vacuum to the headlights.
Read and watch these. You probably have a bad line somewhere in that older car.
Did you just install this intake manifold or was it installed before than just started to have problems. If you installed it then you missed hooking something up and have a leak. If it was previously installed and all of a sudden one day it started to happen then you have a cracked line somewhere in the system.
Unless your carb is in such bad shape that it is sucking air at the base gasket then you have a leak somewhere in the system on a bad line or T.
http://blog.zip-corvette.com/corvett...stem-overhaul/
One of the things I love about my 1977 it will raise the Passenger Side Headlight when I start the car and Blink at me LOL My 1977 has a release under the dash to reduce the vacuum to the headlights.
Read and watch these. You probably have a bad line somewhere in that older car.
Did you just install this intake manifold or was it installed before than just started to have problems. If you installed it then you missed hooking something up and have a leak. If it was previously installed and all of a sudden one day it started to happen then you have a cracked line somewhere in the system.
Unless your carb is in such bad shape that it is sucking air at the base gasket then you have a leak somewhere in the system on a bad line or T.
http://blog.zip-corvette.com/corvett...stem-overhaul/
Last edited by MakoJoe; Jul 5, 2014 at 11:08 PM.
Race Director
Joined: Jan 2007
Posts: 10,664
Likes: 695
From: Danville Illinois
2025 Corvette of the Year Finalist - Modified
2024 C3 of the Year Winner - Modified
2021 C3 of the Year Finalist - Modified
2019 C3 of Year Finalist (appearance mods)
Get a can of carb cleaner, start spraying it at 12:00 ( the dist ) and work your way around the engine while you have a vacuum gauge attached, have a coworker watch the gauge.
Spray everything !!!..
And work the head lights, air, etc while doing said above.
Keep asking your helper what the gauge is doing.
Hope this helps.
Spray everything !!!..
And work the head lights, air, etc while doing said above.
Keep asking your helper what the gauge is doing.
Hope this helps.
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Thread Starter
7th Gear
Joined: Jul 2014
Posts: 7
Likes: 0
i'm completely stumped. i've sprayed down everything. in signs of leaks. i time it correctly. (still sounds like there's a little flutter in there, like it's missing. original Q-jet has been completely rebuilt. but i just can't put it in gear without it dying out. i've detached all lights and wiper vacuum from the engine.
