TheSamba.com :: View topic

Wed Jul 19, 2017 4:47 pm

My 74 thing starts from a cold situation without much trouble. However, after running for a while then stopping for 20/30 minutes it seems to struggle starting back up. This is backward to any past issues I've had with this and other VW's. Any ideas I can try?

Thu Jul 20, 2017 3:57 am

Check the routing of fuel lines in the engine compartment. A fuel line maybe in contact with something hot(intake manifold preheat pipe, shroud, etc.) resulting in vapor lock.

Fri Jul 21, 2017 9:21 am

Non Ethanol gas, if you can find it, might be a help. The alcohol in ethanol can cause vapor lock.

Fri Jul 21, 2017 7:41 pm

this may be a good read:

http://www.vw-resource.com/vapor_lock.html

my 73 don't start well after a long 55-60mph run.

have to floor it and crank to get it to start.

when it's cold, it starts easy.

hope it helps,

T

Sat Jul 22, 2017 9:39 am

Is it the starter cranking slow, or the engine won't fire?

Sat Jul 22, 2017 10:25 pm

Starter is turning fine. It just seems like it's flooded or not firing cleanly. Also smells very "gassy" right after starting. Once started it takes a few minutes to smooth out and then runs pretty well.

Sun Jul 23, 2017 8:56 am

Stock solex carb?

Does it have the fuel cut off solenoid? Is it working?

Is the choke set correctly?

Seems to me you are getting too much gas for starting at hot temps. Those are two things I would check.

Sun Jul 23, 2017 9:43 am

The owners manual says to hold the pedal down 3/4 down when starting when hot.