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Old 11-23-2012, 09:54 PM   #1
marman101
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Flutter sound Question

I have had a flutter sound in my motor recently. I did replace the carb to no avail. It has that sound like when you get cheap gas. I did fill up with premium, but it still flutters. I adjusted timing, but still there. I have put octane booster and racing fuel in it and it still flutters. I get the feeling the old truck needs a valve job.

Any ideas?

Thanks.
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Old 11-26-2012, 07:06 PM   #2
marman101
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Re: Flutter sound Question

Quote:
Originally Posted by marman101 View Post
I have had a flutter sound in my motor recently. I did replace the carb to no avail. It has that sound like when you get cheap gas. I did fill up with premium, but it still flutters. I adjusted timing, but still there. I have put octane booster and racing fuel in it and it still flutters. I get the feeling the old truck needs a valve job.

Any ideas?

Thanks.
Really?
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Old 11-26-2012, 07:23 PM   #3
vectorit
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Re: Flutter sound Question

Can you be more specific on the noise, the word "flutter" is pretty vague.

Details on the truck, and engine would be helpful as well.
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Old 11-26-2012, 08:02 PM   #4
GASoline71
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Re: Flutter sound Question

If it's really old... it's probably telling you it's time for a rebuild. Could be a cam going flat.

Gary
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My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread.

The Rebuild of Creeping Death after the wreck

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I would never rebuild a 305.
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I love using vacuum gauges as part of the carb tuning process. I hook the gauge to the inside of my garbage can and leave it there.
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Remember Murphys 2nd law of mechanical relationships... "OPPOSING COMPONENTS ATTEMPTING TO OCCUPY THE SAME SPACE, AT THE SAME TIME, GENERALLY END UP OCCUPYING ADJOINING SPACE AT THE BOTTOM OF THE OIL PAN"
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Its cheaper to listen to advice given when you ask for help than it is to ignore everyone and wait for carnage.
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