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howling carburettor?

the carburettor is making a howling sound when the trottle is opened wide. any idea what that is? important?

I was dignosing the EGR system, looking at a vacuum guage on the hose at the top of the valve, feeling for movement in the diaphram, etc. with the engine idling and opening the throttle to generate some vacuum. was not sure where the sudden high pitched howling sound was coming from until I removed the air cleaner. shutting off the engine gets rid of it until the throttle is opened wide again. spraying carb cleaner in the carb had no effect. have not tried this on a road test yet.

(BTW EGR problem seems to be in the solenoid. Opening throttle wide enough creates sufficient vacuum (16 in) to open valve but should open sooner (2300 RPM) according to the do-it-yourself book I'm looking at. valve itself seems to operate smoothly enough when pushed up manually. it was sticking a bit until I sprayed carb cleaner on the stem and let it sit overnight.)

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Reply to
William R. Watt
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This is probably a "troll", but to us old farts, the howling sound is EXACTLY what we were looking for. -PapaRick

Reply to
Rick Colombo

this is a serious question. there is a high pitched sound like a factory whistle coming from the carburettor, feedback carburettor on a 1989 Forst Festiva, Mazda 2B engine which is running warm.

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Reply to
William R. Watt

Howling carb and a messed up EGR system spells vacuum leak to me.

I would be taking some carb cleaner spray and spray it around the base plate of the carb and along the gasket of the intake manifold.

Mike

86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's

"William R. Watt" wrote:

Reply to
Mike Romain

Do you mean "EXACTLY what we were looking for" as in it's a good thing, or as in it's a problem to fix?

My 1992 Dodge Shadow 3-liter has always done this, and I've wondered what it is. Whistles like crazy when the throttle is wide open.

I just assumed (yes, I know what that means!) it was air being sucked into the intake and whistling on some protrusion or burble in the airflow.

Am I incorrect? Could you please explain it to this middle-aged-but-clueless fart? :-)

TIA

Mike Patterson Please remove the spamtrap to email me.

Reply to
Mike Patterson

Reply to
Mike Walsh

Yes I was. Now that I read that the sound is more like a whistle, then I go with Mike, that sounds like a vacuum leak. -PapaRick

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Mike Walsh wrote:

throttle, and not the whistle that the original poster spoke of.

Reply to
Rick Colombo

thanks for the comments. not looking forward to trying to squeeze a spray can of carb cleaner down between the engine and the firewall and trying to take shots at the hose ends. there's something down there that looks like an octopus which I can only just see with the help fo a small hand mirror. :(

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Reply to
William R. Watt

music?

nate

Reply to
Nate Nagel

Check to see that it's bolted down properly and the base gasket is functional.

Reply to
Brent P

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