Strong gas smell when I stomp on it - Team Camaro Tech
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post #1 of 18 (permalink) Old May 13th, 06, 06:07 PM Thread Starter
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Strong gas smell when I stomp on it

I have a '68 SS/RS 350. The car runs great but when I get on it hard I smell gas. I've pulled over and popped the hood and air cleaner and there's a lot of gas in the carb. If I drive normally for a couple minutes the smell goes away. There are no leaks anywhere in the fuel line and connections. Sorry, I don't know much about carberation. Could it be as simple as adjusting the mixture screws? It's a Rochester Quadrajet. Like I said the car runs great even when this happens. Thanks in advance for any help.

Joe
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post #2 of 18 (permalink) Old May 13th, 06, 08:27 PM
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Re: Strong gas smell when I stomp on it

Check your float levels......they might be set too high.

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post #3 of 18 (permalink) Old May 14th, 06, 06:27 PM
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Re: Strong gas smell when I stomp on it

Replace the gas cap. I have same car, and I had the same problem............

Gas cap replacement cured this problem.


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post #4 of 18 (permalink) Old May 15th, 06, 06:48 AM Thread Starter
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Re: Strong gas smell when I stomp on it

Thanks guys. I think I'll try the gas cap first since I don't know how to adjust the float levels.

Joe
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Never enough time... even less money.

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post #5 of 18 (permalink) Old May 15th, 06, 09:02 AM
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Re: Strong gas smell when I stomp on it

Quote:
Originally Posted by gro51
and there's a lot of gas in the carb. Thanks in advance for any help.
Remove the air cleaner and you will find the secondary needle/rod hangar next to the air cleaner stud.

Shove some cotton ball(s) into this void. This void is a direct route to the secondary system fuel supply, which is the fuel bowl. Drive the car as before.

If the smell is gone, then the fuel level is too high, as fuel is dumping out from the bowl into the secondary plates. Have the float level checked and adjusted if necessary.

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post #6 of 18 (permalink) Old May 15th, 06, 10:47 AM Thread Starter
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Re: Strong gas smell when I stomp on it

Everett#2390 - Are you talking about the void just forward of the stud, about 1 in. by 1/2 in. in size? How tight should i pack in the cotton balls?

Joe
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post #7 of 18 (permalink) Old May 16th, 06, 03:03 AM
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Re: Strong gas smell when I stomp on it

Yes, It doesn't have to be tightly packed, 1 or 2 balls should be more than enough.

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post #8 of 18 (permalink) Old May 16th, 06, 06:29 AM Thread Starter
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Re: Strong gas smell when I stomp on it

Thanks. As soon as it stops raining here in the Northeast, I'll give it a try and let you know how it goes.

Joe
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post #9 of 18 (permalink) Old May 16th, 06, 07:05 AM
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Angry Re: Strong gas smell when I stomp on it

It May Nnever Stop At This Rate.i Am Thinking Of Building An Ark Instead Of My Camaro
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post #10 of 18 (permalink) Old May 19th, 06, 12:42 PM
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Re: Strong gas smell when I stomp on it

Had same problem. Jets were to big. Put smaller ones in and problem went away and the car ran better.

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post #11 of 18 (permalink) Old May 21st, 06, 03:25 AM
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Re: Strong gas smell when I stomp on it

Quote:
Originally Posted by bills69
It May Nnever Stop At This Rate.i Am Thinking Of Building An Ark Instead Of My Camaro
I'VE SEEN the SUN after a week & 1/2!! I'm half way through My ark building How much will you offer me for it?


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post #12 of 18 (permalink) Old May 21st, 06, 04:31 AM
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Re: Strong gas smell when I stomp on it

How Many Horses Under The Hood!!!!!!!!!!
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post #13 of 18 (permalink) Old May 23rd, 06, 07:15 PM Thread Starter
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Re: Strong gas smell when I stomp on it

Okay, I tried the cotton ball trick recommended by Everett#2390. It pretty much got rid of the gas smell. Now I'm supposed to adjust the float level. Can someone walk me through that please?

Joe
'68 SS/RS 350
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post #14 of 18 (permalink) Old May 24th, 06, 07:00 AM
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Re: Strong gas smell when I stomp on it

place rags on manifold under the carb.
start motor
remove primary bowl plug
with screwdriver and wrench back out screw( on the float adjustment ) a little bit at a time and turn the nut to adjust level until a slight trickle of gas comes out of the plug hole.( turn clockwise to lower fuel level and counterclockwise to raise the fuel level)
tighten the screw and blip the throttle.
recheck adjustment (wait to see if fuel trickles out again . if not readjust the bowl set screw as above)
once the bowl level is set reinstall the plug and do the secondary side in the same manner.
also keep in mind fuel will seep out of the plug hole and sometimes the adjusting screw so ya kinda gotta work fast and clean up all the spills afterwards.


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post #15 of 18 (permalink) Old May 24th, 06, 08:44 AM
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Re: Strong gas smell when I stomp on it

He has a Quadrajet, not a Holley.

He would need to:
Remove air cleaner assembly.
Remove screw from secondary rod hangar and remove hangar with rods aside.
Remove choke rod from well, passenger side.
Remove several screws from the body, two inside air horn, rest about the perimeter.
Tap top plate with a rubber hammer to loosen.
Once loosen, lift straight up and unhook accelerator pump linkage and any other linkage, attachments, and etc. from air horn.
Flip plate over carefully without losing float, float pin, and needle.
With gasket in place on plate, measure, I think, from the top of the gasket to the top (now its on the bottom) of the float in the middle of its length.
If adjustment is needed, bend tab at needle.
Reinstall air horn in reverse of previous steps.

Be sure to guide the power piston and its spring in their holes, accelerator pump rod, and the secondary needle hangar into their respective places during the assembly process.

Float level is from 3/16 to 5/16 inch. The gap between the top of the float and gasket. In fact, with plate upside down, float pointing up, I believe the float and gasket are parallel to each other. You may want adjust the float further away from the gasket just a hair, a red one.

You might need to get a rebuild kit for the carb before onset. The gasket may break if it is old. Sometimes, one can separate them with gasket in tack. there is a tag attached to one of the screws and/or take the number from the side of the body, 7-digit, 70XXXXX, and give to get the correct kit.

Good luck.

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