Engine making machine gun noise

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Old 03-27-2011, 09:03 PM
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Exclamation Engine making machine gun noise

Im new to the forums hoping someone will be able to help. Last night i drove my 1971 plymouth scamp with a rebuilt 360 (from a 74 duster?) and all was fine. Today the engine wouldnt turn over and after several tries it now makes a machine gun like noise when trying to start it, it sounds like its coming from the carburetor. Also when you press the gas pedal fuel leaks out of the front of the carburetor, its a 4 barrel from edelbrok.
Old 03-28-2011, 10:56 AM
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Sounds like battery connection. Only sound I've ever heard a carb make is a hisss.

When it makes this machine gun sound, does it still turn over?

The fuel leak could be a gasket or sticking float.
Old 03-28-2011, 12:03 PM
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^ word. you're sure the noise isn't the starter?
Old 03-28-2011, 12:43 PM
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Welcome to the forum. I agree about battery connections or starter. Let us know how you make out.

john
Old 03-28-2011, 04:46 PM
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Thanks for responding and your welcoming,
ok it was the battery, but now when attempting to start the car white smoke comes out of the carburetor, once i saw the smoke i turned the car off and a huge cloud of white smoke jumped out of the carburetor. Any ideas?

Last edited by 71 scamp; 03-28-2011 at 05:44 PM.
Old 03-28-2011, 09:09 PM
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Sounds like it's flooded.
Old 03-29-2011, 03:02 AM
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Is it latterly leaking from the carb? Or is it coming out where the gasket is?
Hats just weird I have never seen gas come out of a carb from the front.
Old 03-29-2011, 04:21 PM
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It's hard to tell exactly what part it's coming out off, it seems to be leaking from right under the accelerator pump arm (I think that's what it's called, the spring that goes down when you pull the accelerator back) Tried to un-flood it today by slowly pressing the pedal all the way down while holding open up the choke valve and starting it, no luck. If you couldn't guess I don't know much about cars but I'm eager to learn so if you could step by step help would be nice
Old 03-29-2011, 05:41 PM
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Does the engine try to catch at all? You could pull a plug or two, and see if they are wet or dry.

If the car sat overnight, it wouldn't still be flooded.

For an engine to run you need fuel/air, compression and spark. Those are also the three easiest things to check.
Old 03-29-2011, 09:29 PM
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It doesn't really seem like it's trying to catch, when the engine turns it seems weak like only a miracle will make it start. I don't have to tool to check the spark plugs but I'll happily get one tomorrow if it'll help. As I looked more at the engine I noticed old gasoline collected in a pocket so I don't think the leaking carburetor is a new problem. Could it be the starter motor died in 1 day?
Old 03-30-2011, 08:07 AM
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I would get the battery charged up first, and go from there.

To check spark, you can just pull a plug, and with the plug in the plug wire hold the end of the plug to the block, have someone crank the engine with the key on, and watch for a spark.
Old 03-30-2011, 06:23 PM
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it could be a bad ground on the starter not letting a good connection happen
Old 03-31-2011, 06:36 PM
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thanks for the help everyone, i feel a little foolish but it turns out the car i was trying to jump mine with wasn't as powerful as it should of been, luckily my friend showed up with a v8 turbo charged mercedes. thanks again for all your help.
Old 04-07-2011, 11:16 PM
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There are some systems that make a clicking noise that is natural and nothing to worry about, for example: fuel injectors, relays, emergency flashers, turn signals and the air conditioner when you first turn it on. These components make a natural click noise when operating. We have listed the most common causes for a clicking noise below






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MR GASKET CARBURETOR LINKAGE
BALL JOINT, 2 PIECES


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