holley carb ??

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First of all, what if the List number of your carb?
80770 or 90770?
Street or Truck Avenger?

street,

Burning eyes means the carb is supplying too much fuel. At idle your main jets should not be involved with the fuel supply at all. Also, your jets should be very close to right on. I agree with the others that you have another problem.
First thing I'd suggest is to take out your needle and seat assemblies and make sure they are working properly. Then carefully set the float level.
At this point you may try to measure fuel line pressure as if it is too high it'll overpower the float and you'll have fuel injection!
The Avenger carbs have power valve protection built in, but try the old trick of turning in the idle mixture screws all the way at idle and seeing if it dies or not. Don't go overboard, just a light finger tight should do it. If the truck doesn't die, change out the power valve. I'd suggest something around a 6.5 or lower.

Go to Holley.com and find the Avenger instructions, there you will find what jets come stock in the carbs, also the power valves.

I hope that when you get the float and fuel pressure setting right, your problem will go away. But if it doesn't, perhaps there is a piece of dirt in the idle air bleed(s). Time to clean out all the passages with a good blast of carb cleaner.

I love my 570 Street Avenger and will be putting a 770 Street Avenger on my 400-inch $500 ford truck. I wish you luck sorting yours out.

R.

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Quote:

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First of all, what if the List number of your carb?
80770 or 90770?
Street or Truck Avenger?

Burning eyes means the carb is supplying too much fuel. At idle your main jets should not be involved with the fuel supply at all. Also, your jets should be very close to right on. I agree with the others that you have another problem.
First thing I'd suggest is to take out your needle and seat assemblies and make sure they are working properly. Then carefully set the float level.
At this point you may try to measure fuel line pressure as if it is too high it'll overpower the float and you'll have fuel injection!
The Avenger carbs have power valve protection built in, but try the old trick of turning in the idle mixture screws all the way at idle and seeing if it dies or not. Don't go overboard, just a light finger tight should do it. If the truck doesn't die, change out the power valve. I'd suggest something around a 6.5 or lower.

Go to Holley.com and find the Avenger instructions, there you will find what jets come stock in the carbs, also the power valves.

I hope that when you get the float and fuel pressure setting right, your problem will go away. But if it doesn't, perhaps there is a piece of dirt in the idle air bleed(s). Time to clean out all the passages with a good blast of carb cleaner.

I love my 570 Street Avenger and will be putting a 770 Street Avenger on my 400-inch $500 ford truck. I wish you luck sorting yours out.

R.

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called holley today, to start it had the wrong power valve.. so im gonna clean it, install new parts .. set it at original settings and start from there..

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also make sure you have a New fuel filter, because the smallest particle can cause the needle and seat to stick open and with the air cleaner off and the engine idling, you should see raw fuel drizzling off the boosters.

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The idle screws only control how much fuel mixture comes out of the idle ports, the t-slot should only show a square hole below the blades at idle. If your curb idle screw is in too far it will run on the t-slot and the screws won't do much. The power valve should not figure into this at all. No gas should be visible coming out of the boosters.

I have had holleys that wanted .75 turns out on the idle screws to burn clean. This is a can of worms- good luck.

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