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Hi All I have a 1969 camaro ss with a 350 bored .30 over that has very recently been rebuilt. I have a Holley 650 4bbl that has also been rebuilt and modified for optimum performance. Well I have noticed a very strong raw fuel smell and had a friend of mine check it out for me...the primaries continue to leak gas into the carb after letting off the throttle. He said he had never in all his 30+ years of working on carbs and engines seen anything like that. We switched out the squirters to see if that was the problem but it still did the same thing. When we took it off completely, gas bubbled from the hole. As if air was somehow bubbling out. The secondaries do not do it. We are assuming it is the fuel boiling...I checked it the following morning and it didnt do it. Has anyone else ever heard or had this happen? If so what is it? Would an insulator plate take care of the problem? Thanks for your help! Lori Posts: 3 | From: San Diego CA | Registered: Nov 2002
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First, I would check your float levels, they may be a little high. Also, you might have a needle/seat leaking.
Most important, take that Holley and sell it at the swap meet, and go buy a #1406 edelbrock 600cfm w/electric choke. You will have to do a little tuning to it to get it to run optimum,but it is by far a better carb!!! Best yet, take it to a shop experienced with tuning on a dyno, and get the fuel curve set up right. You will be happy you spent the money, as it will run great, and wont need to be "messed with" all the time like a Holley does. Posts: 1443 | From: Lake Oswego, Oregon | Registered: Dec 2001
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Thanks guys. I know I know I would love to have a nice edelbrock, but to make a looong story short I am stuck with the holley paperweight for awhile. When I can afford it, I will be swapping for a real carb. So in the mean time, will ya forgive me for having an ex hubby who installed the holley? Wasn't my idea )! And will the insulator plate help?
Email me with responses Lori
Posts: 3 | From: San Diego CA | Registered: Nov 2002
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My first thought was float level/collapsed float. So I agree with Steve. Check floats and needle seats first. Could be wrong, but I don't think you have a fuel boiling problem. Why would only the secondaries super heat??? Good luck with the repair/replacement.
-------------------- 02 SS vert 35th LE #2790 of 3369, M6 SLP 345HP CME, 97 SS vert 30th Annv. M6 stock, 96 Z28 vert. A4 stock Posts: 339 | From: Philadelphia | Registered: Jul 2002
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My carb guy said the floats are fine. I am at a loss. Go figure, I work on my own car, have helped others with theirs, and this carb has me stumped. I'll check out the needle and seat and see if maybe something is wrong there...thanks again and will let ya know what happens.
Lori Posts: 3 | From: San Diego CA | Registered: Nov 2002
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quote:Originally posted by vee8: My carb guy said the floats are fine. I am at a loss. Go figure, I work on my own car, have helped others with theirs, and this carb has me stumped. I'll check out the needle and seat and see if maybe something is wrong there...thanks again and will let ya know what happens.
Lori
The floats may be fine but what about the float bowl level? How rpm does the engine idle at? Torn air horn gasket?
Posts: 5682 | From: Dearborn,Mi. | Registered: Feb 2002
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also, make sure you check the fuel pressure. If its too high, it will sink the float and make it want to do kind of what you are describing, only it will usually do it both ends. You dont want over 6.5-7psi at the inlet to the carb. If its higher, then put a pressure regulator on it. Good luck! Posts: 1443 | From: Lake Oswego, Oregon | Registered: Dec 2001
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)! And will the insulator plate help? 
