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Adjusted the float level this morning. 1st went too far & ran out of gas. So I backed it out 1 turn. Still floods after it's been sitting for 30 mins or so. Did I open it up too far? It's starting to get embarrising.

66 Coupe, 302, Auto, 3.25 gears. [color:red]Candyapple Red</font color=red> with White Pearl Stripes. Cragars.
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I just had mine rebuilt and had the same problem. After sitting for 10 minutes or more, it would be flooded when Ii tried to restart it. It turned out to be a bad power valve in the front bowl.

67 Sports Sprint, Convert. Original C code, now 293 ci with Holley 450 and 295,000 miles
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Hi, doesn't your holley have a sight plug in the side of the bowl? pull the big screw out of the side of the bowl that is the sight plug. start the car and adjust the float level so that the gas level is just to this hole. put the plug back in and it should be good to go. John

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Yes it does. I tried that yesterday. Made a real mess with the gas coming out of the sight glass (hot cam shaking engine) and coming out while I had the adjuster nut loose. Is that the way it's suppose to do?

66 Coupe, 302, Auto, 3.25 gears. [color:red]Candyapple Red</font color=red> with White Pearl Stripes. Cragars.
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It could be a bad power valve. If the carb is not a new one, or if it has ever backfired
out of the carb. -It is frustrating-. If the timming is to far retarded it will backfire through
the carb. If it starts OK right after you shut it off, but doesn't after a few min. it could
sure be the power valve. If you change it make sure you clean all the old gasket off
the metering block and bowl.
 

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Hi, you should have some gas coming out the adjuster nut and some splash out the sight plug but not alot out of the site plug John

Opal frost pearl metallic 67 coupe http://www.jps.net/binay/webdocs/febef75b01.JPG
also have a 95 opal frost pearl G/T BOSS edition convertible belongs to swmbo
 

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Its a holley , it floods


If in doubt give it a clout
If at first you don't succeed , find a bigger hammer
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Hello,

My Holley 4150 had this problem last summer to the rear bowl and the summer before the front bowl. I took the bowl apart and found my float both times were filled with gas. So the float wasn't floating...which caused my engine to flood when I came to a stop. Check those floats.

Stang6767
Bryan
 

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are you running a spacer under the carb?..I had a similiar problem once and it turned out heat from the engine was causing the gas to percolate into the bores causing flooding..I put a spacer under the carb and it solved the flooding

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Holley's are a pain in the a$$, big time. I will never buy another Holley as long as I live. If your into adjusting your carb daily, gofor it, otherwise, buy a carter or edelbrock.

68 fastback, 390 4V premium fuel
80 5.0 hatch, just finished
91 5.0 coupe, daily driver
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I've had my share of similar Holley problems too! I rebuilt two different carburators and had this problem on one and not the other. I ended up rebuilding the problem one again and still couldn't fix it. After conferring with a friend who is really excellent at carbs, he said some of the internal porting is most likely the problem even though I had had the carb dipped, they were probably not thouroghly cleared. I ended up with a brand new carb before finally fixing the problem.
If you don't care about it being original I would suggest an Edlbrock or Carter carb. They seem to perform much better on Fords!
 

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One thing to keep in mind when lowering the fuel level on a holley. Once you have turned the adjusting nut on the top of the needle/seat down (you will get a burst of gas due to the fuel pump pressure) bear in mind that the fuel in the bowl hasn't been used for you to gain an accurate reading. I put a rag on the intake manifold just below the front bowl. Then i loosen one of the bowl screws to drain some of the fuel. This allows the fuel pump to raise the fuel level to the new setting that you just adjusted the needle/seat to. If you merely screw the adjustment down, you wont lower the level until you actually take the car for a ride.Draining the bowl slightly simulates this. The same applies to the secondaries. Unless you take the car out and tip the secondaries open the fuel in the rear wont get used and adjust to the new level. An ideal float adjustment for me is to have gas slightly wet the threads on the sight plug hold when the car is given a slight nudge. Having it trickle out seems to be a bit much as the fuel level will no doubt rise when heated.
Furthermore, i agree with the gentleman above concerning spacers. Holleys tend to run better when they are cool. My 429 f150 experienced some fuel percolation especially after shutting a hot engine off. The rapid heat tends to raise the fuel level causing it to percolate and spill over into the primary throttle bores. Going to a teflon type of spacer cured that for me.
Hope this helps in some way. John
 
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