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s
hey got a question. my 78 has a stong exhaust\gas smell when driven. now the car has a small exhaust leak but nothing that should leave the smell on occupants like it does. the carb is a new quadra jet
installed by the a reputable mechanic but i wonder if its running rich. any thoughts.
installed by the a reputable mechanic but i wonder if its running rich. any thoughts.
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m
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Send PMEquinunk, PA - USA
Joined: 10/31/2007
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Vette(s): 1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.
The NEW part has me concerned. Sounds rich to me.
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Send PMHOWELL, NJ - USA
Joined: 5/18/2004
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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.
Pull a plug and take a look after a long ride at cruissing speed. Black plugs=rich condition... (keep yer winders open 
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Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
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Check ALL of the hoses going into/out of the fuel tank. Also, look for signs of fuel leakage running down from the top to bottom of the tank, especially at the rear. If the seal between the sender unit and the tank is old, dried up, and cracked, it will give you a very strong fuel odor inside the cabin.
If you are getting that strong of a fuel smell inside the car, you have raw fuel leaking somewhere, either from the carb, or the fuel tank/hoses.
Look around the fuel pump with the engine running, too...it could be leaking, but you wouldn't see much evidence of it just sitting, as the fuel would evaporate too quickly to leave a puddle.
If you are getting that strong of a fuel smell inside the car, you have raw fuel leaking somewhere, either from the carb, or the fuel tank/hoses.
Look around the fuel pump with the engine running, too...it could be leaking, but you wouldn't see much evidence of it just sitting, as the fuel would evaporate too quickly to leave a puddle.
Joel Adams
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s
ok fuel lines to the pump seem ok. but the lines going out of the canister are not right one may be missing can the line thats missing be capped? any ideas on where to find a fuel canister schematic so i can see where the lines are supposed to go. i have a haynes but they seem to be crappier latley with very little details.
scrappy78 2010-11-06 06:43:58
thnx
j
ps since there are no lines from canister to the carb can i seal the canister and get a vented gas cap
will any work or do i need a specific one for my vette. are there any downsides to going this route
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Well looks like you found the problem..without the carb being hooked up to the canister all the fumes from the tank are ending up venting under the hood..I know evap stuff people think rob the car of power but if it still setup to have it, it should be hooked up..you can plug the canister stuff and get a vented cap..that's how mine works so it is not a big deal..I don't think the emissions police are in your part of town!
Rich
Rich
My first parade at Carlisle 2010
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s
ok would a generic gas cap work or does it have to be something special
thnx
J
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If you buy the stock replacement it won't be vented..get a vented style..maybe Joel has a better idea on this also.
Rich
Rich
My first parade at Carlisle 2010
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s
ok thnx
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Why not just return the canister to being operational? Without it working your garage will also fill with fumes from the vented cap and the carb vent.
I replaced the canister and hoses on my 82 in about 40 minutes. By removing the side vent the access to the hoses and canister is easier.
There should be a vacuum schematic in the GM service manual.
I replaced the canister and hoses on my 82 in about 40 minutes. By removing the side vent the access to the hoses and canister is easier.
There should be a vacuum schematic in the GM service manual.
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in Forum: C3 HVAC, Fuel, Emissions, and Exhaust
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