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'74 runs funny
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terrything
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Joined: January 31, 2010
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Location: Santa Fe, New Mexico
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PostPosted: Wed Jul 19, 2017 4:47 pm    Post subject: '74 runs funny Reply with quote

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?
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DerrickfromNC1
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PostPosted: Thu Jul 20, 2017 3:57 am    Post subject: Re: '74 runs funny Reply with quote

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.
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ALANSD
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PostPosted: Fri Jul 21, 2017 9:21 am    Post subject: Re: '74 runs funny Reply with quote

Non Ethanol gas, if you can find it, might be a help. The alcohol in ethanol can cause vapor lock.
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doublecanister
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PostPosted: Fri Jul 21, 2017 7:41 pm    Post subject: Re: '74 runs funny Reply with quote

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
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YDBD
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PostPosted: Sat Jul 22, 2017 9:39 am    Post subject: Re: '74 runs funny Reply with quote

Is it the starter cranking slow, or the engine won't fire?
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terrything
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PostPosted: Sat Jul 22, 2017 10:25 pm    Post subject: Re: '74 runs funny Reply with quote

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.
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YDBD
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PostPosted: Sun Jul 23, 2017 8:56 am    Post subject: Re: '74 runs funny Reply with quote

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.
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'56 pan Dune Buggy since '69
don't live in the past...but when I did:
'67 bug
'64 baja
'60 dune buggy
'73 Personenkraftwagen Type 182 "Thing"
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Ron Domeck
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PostPosted: Sun Jul 23, 2017 9:43 am    Post subject: Re: '74 runs funny Reply with quote

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