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Joined: Jul 2015
Posts: 188
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Jul 2015
Posts: 188 |
Hi Everybody , hope all is well...
been a while since was last on chat. The 30 sport coupe has developed a popping sound when you start it.
you start to give it the gas it pops. rather loud. at low rpm.
when gas pedal was pressed at a higher rpm it went a way.
made a couple videos, however, cant attach.
thanks for the help
Dave
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Joined: Apr 2010
Posts: 734 Likes: 14
Oil Can Mechanic
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Oil Can Mechanic
Joined: Apr 2010
Posts: 734 Likes: 14 |
Hello daves30,
I will go toward thinking that the carbs accelerator pump is not functioning. If a pop is the same thing as a miss, the next cylinder to fire does not have the fuel to continue a smooth acceleration. Eventually, continuing to slowly bring the rpm higher, you have a steady engine. Do you have popping or hesitation when you shift to a higher gear and bring the throttle up?
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Joined: Dec 2007
Posts: 4,024 Likes: 99
ChatMaster - 4,000
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ChatMaster - 4,000
Joined: Dec 2007
Posts: 4,024 Likes: 99 |
In my ”˜37 the popping sound is my knee trying to flex when I push on the clutch!
Rusty
VCCA #44680
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Joined: Nov 2001
Posts: 19,758 Likes: 64
ChatMaster - 15,000
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ChatMaster - 15,000
Joined: Nov 2001
Posts: 19,758 Likes: 64 |
First try to close down the idle adjustment mixture screw a little. A little richer idle mixture can often eliminate the pop from low speed idle.
How Sweet the roar of a Chevy four!
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Joined: Jul 2015
Posts: 188
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Jul 2015
Posts: 188 |
funny rusty thought i was only one
thank you chipper
Harrys 31, no it seemed to go away at higher rpm, would not idle, fact came back home and boss lady said
car was running great......said it wasnt running
Last edited by daves30; 08/02/21 05:34 PM.
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Joined: Apr 2010
Posts: 734 Likes: 14
Oil Can Mechanic
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Oil Can Mechanic
Joined: Apr 2010
Posts: 734 Likes: 14 |
Hello daves30,
Maybe your boss lady is hinting at an electric powered conversion. Pretty funny. Chipper seems to be on the issue. Too lean a mixture at idle might be it. If the exhaust muffler an/or pipe isn't partially restricted, and the engine appears to run well at higher RPM, you may consider a lean fuel mixture. Check for vacuum leaks also.
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