Carbureted Chevy 350 Starts Then Dies - Need Help Diagnosing!

Maintenance and Repairs
1

I’m having a real headache with my carbureted Chevy 350 engine. It starts up just fine, but then it dies almost immediately after. It feels like a fuel delivery issue, or maybe something with the carburetor tuning? I’m not sure if it could also relate to the ignition system or some other components.

Here’s what I’ve tried so far:

  • Check Fuel Levels: I’ve verified that there’s enough fuel in the tank.
  • Inspect the Carburetor: I cleaned the carburetor, ensuring no blockage in the jets.
  • Look at the Fuel Filter: Replaced the fuel filter just in case.
  • Examine Ignition Components: Checked the spark plugs and wires; they seem okay.

What should I check next?

I’m thinking about testing the fuel pump output or maybe adjusting the carburetor settings. Has anyone else run into this issue? What worked for you? Any troubleshooting steps or guides would be greatly appreciated!

Tips for Success

  • If you’ve had similar experiences, please share your knowledge!
  • Also, if you have any questions about specifics, don’t hesitate to ask!

Thanks in advance for any help you can offer!

2 Likes
2

If your carbureted Chevy 350 starts and then dies, it could be a fuel delivery issue. Make sure the fuel pump is working properly and that there are no clogs in the fuel lines.

7 Likes
3

Also, check the fuel filter. A clogged filter can restrict flow and cause the engine to stall after starting.

4

Vacuum leaks can also lead to these symptoms. Inspect all hoses and gaskets for any cracks or disconnections.

5

Definitely! A small vacuum leak can disrupt the air-fuel mixture and cause stalling. Check the intake manifold as well.

6

Don’t forget about the ignition system. Issues with the distributor or spark plugs can cause the engine to start but die quickly.

7

Right! Low spark can be a culprit too. Testing the spark at each plug is a good starting point.

8

Have you checked the choke? If it’s stuck closed, it can flood the engine and lead to stalling.

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9

Make sure you’re using the right fuel mixture, too. Sometimes, an incorrect ethanol blend can contribute to these problems.

10

That’s a great point! Ethanol can cause issues, especially in older engines. Always check the fuel grade.

11

Consider testing the carburetor. If it’s not adjusted properly, it can lead to starting issues. Sometimes, just a cleaning can help.

12

Absolutely! A dirty jet can make all the difference. Cleaning it might solve your problem instantly.

1 Like
13

Have you checked the battery voltage? Low voltage can affect your ignition system’s performance and cause stalling.

14

Good point! Sometimes the simplest things are overlooked. A fully charged battery is crucial for starting.

8 Likes
15

Just a thought, did you consider checking your timing? Incorrect timing can lead to rough starts and stalls.

16

Absolutely, timing issues can be a headache. A timing light can help you diagnose that.

17

Maybe it’s just shy! My Chevy used to do that until I assured it I loved it. Just kidding! But really, keep checking those systems.

18

First things first, check your fuel pressure. A weak or inconsistent fuel pump could be the culprit here. Use a gauge to see if you’re getting enough pressure.

19

Great advice! After that, I’d recommend inspecting the carburetor for clogs or improper settings. Sometimes just a thorough cleaning can do wonders.

20

Don’t forget to check the electrical connections too! Bad grounds can cause the engine to die unexpectedly. Make sure all wires are tight and corrosion-free.