Engine stumble

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Aaron w

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Jan 24, 2021
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Location
Centralia, wa
First Name
Aaron
Truck Year
1977
Truck Model
K10
Engine Size
5.7
I had purchased this truck 3 years ago and have slowly been replacing the badly rusted spots. I finally got it running and when I took it on the road it was interesting. I put it in gear and it stumbles, I push the accelerator and it stumble badly to the point it wants to die. Could anyone please help me out. If not then it is off to the shop.

Thank you
Aaron
 

PrairieDrifter

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North Dakota
First Name
Mason
Truck Year
84,79,77,70,48
Truck Model
Suburban k10, bonanza k10, c30 C&C, c10, gmc 1/2ton
Engine Size
350, 350, 350, 350, 350
Carb rebuild most likely. Not knowing anything about the truck or history
 

Bextreme04

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Oregon
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Eric
Truck Year
1980
Truck Model
K25
Engine Size
350-4bbl
Carb rebuild, maybe vacuum leaks, maybe cap/wires/plugs, maybe all of the above. I’d start with a compression test and check the vacuum at idle. Then I’d be setting the initial timing, then setting the idle speed and idle mixture. You should probably check the condition of the ignition components including spark plugs and air filter before doing anything else.
 

Snoots

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Georgia
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Roger
Truck Year
1973
Truck Model
Jimmy Sierra
Engine Size
350
Sounds like a vacuum leak or timing issue.
 

Ricko1966

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kansas
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Rick
Truck Year
1975
Truck Model
c20
Engine Size
350
What year is it? What engine? If it's carburated check to see if you have accelerator pump shot. And how are we supposed to diagnose a stumble without pics. Rusty will school you on this.
 

Poppy 87

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Bloomingdale GA
First Name
John
Truck Year
1987
Truck Model
R10 Silverado
Engine Size
305
Be sure to add fresh gasoline and fuel filter to the things listed previously
 

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