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John209

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Half lean half rich🤔
« on: June 28, 2024, 10:28:24 PM »
So I took the boat out today and after running around for 30 min we pulled plugs to see why I was getting a weird misfire bobble after 3500rpms. (Installed new plugs day before). Well we noticed that one bank was rich one the other bank was lean. I have never seen anything like this before with carbs. Any ideas?
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Re: Half lean half rich🤔
« Reply #1 on: June 29, 2024, 02:50:21 AM »
After 3500 rpm, I'd imagine something blocking the metering plate (4160) or one of the secondary jets clogged (4150)
I suppose primaries could have the same result.

Quadrajet, metering rods and jets, for the secondaries?

Edelbrock there's some filters that look like socks, one of them plugged up?

Dan'l
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John209

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Re: Half lean half rich🤔
« Reply #2 on: June 29, 2024, 07:52:44 AM »
After 3500 rpm, I'd imagine something blocking the metering plate (4160) or one of the secondary jets clogged (4150)
I suppose primaries could have the same result.


Sorry I forgot to mention that it?s a tunnel ram with 660 Center squirters  and both carbs were just completely rebuilt. We disassembled them and had them in the sonic tank just hours before we took it out.

Quadrajet, metering rods and jets, for the secondaries?

Edelbrock there's some filters that look like socks, one of them plugged up?

Dan'l
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Re: Half lean half rich🤔
« Reply #3 on: June 30, 2024, 07:06:39 AM »
I've got nuthin on a tunnel ram.
Leaking intake gasket on the lean side?
Which way are they mounted?
Freight trained or sideways?

Dan'l
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John209

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Re: Half lean half rich🤔
« Reply #4 on: June 30, 2024, 10:33:52 AM »
Freight train. Such a pain in the ass when I trying to dial in the jets a few years ago.
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Re: Half lean half rich🤔
« Reply #5 on: June 30, 2024, 10:59:10 AM »
Seen a T-shirt below a blower on a boat before. Couldn't get it to run right after the new motor.

Any chance you're missing a T-shirt?

Danl
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John209

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Re: Half lean half rich🤔
« Reply #6 on: June 30, 2024, 02:49:32 PM »
Seen a T-shirt below a blower on a boat before. Couldn't get it to run right after the new motor.

Any chance you're missing a T-shirt?


🤣😂🤣😂🤣. Nope. No missing clothing

Danl
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96Laveycraft21Xt

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Re: Half lean half rich🤔
« Reply #7 on: July 01, 2024, 08:52:58 AM »
Just had a holley last year that had 1 power valve channel not drilled through all the way.  Had one half of the motor lean while the other half was good but that was on a dual plane intake not a tunnel ram.......
  • Boat #1: '96 Laveycraft 21' XT Ski
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