Topic: hard start when cold
in Forum: C3 Fuel, Emission Control, and Exhaust Systems
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Lifetime MemberModerator
Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
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
Carb is probably draining out the fuel thru the plugs in the bottom of the bowl. Do you see any black smoke when it does start?
Adams' Apple 2007-04-15 21:05:47
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"
I believe it is a stock setup. I don't see black smoke when it starts. Once started it will restart even if I only run it a few seconds. It will start pretty easily for several hours after I start the car. Only when the car sits overnight or longer is it difficult to start.
Lifetime MemberModerator
Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
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
Depending on how bad those plugs are leaking, it can take 6-12 hours to fully drain the bowl. If it is draining that slow, the fuel has probably mostly evaporated by then, and there wouldn't be any large amounts of black smoke when started.
If the fuel was percolating out of the bowl(a heat issue) after shutting it off, it would be hard to start even after a couple of hours.
I'd be checking those plugs. There are little foam rubber type "repair" kits that will at least slow the leak down. The best repair is to re-peen the plugs, and then put a small amount of JB Weld on them.
Check out KEN'S carb o/h article...it is killer, and explains how it all works. Click on the "Ken's Projects", then "Quadrajet".
Adams' Apple 2007-04-17 18:48:01
If the fuel was percolating out of the bowl(a heat issue) after shutting it off, it would be hard to start even after a couple of hours.
I'd be checking those plugs. There are little foam rubber type "repair" kits that will at least slow the leak down. The best repair is to re-peen the plugs, and then put a small amount of JB Weld on them.
Check out KEN'S carb o/h article...it is killer, and explains how it all works. Click on the "Ken's Projects", then "Quadrajet".
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"
in Forum: C3 Fuel, Emission Control, and Exhaust Systems
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