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Dave Samba Elder
Joined: July 11, 2002 Posts: 2692 Location: The Forest Moon of Endor, in the Redwoods
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Posted: Fri Sep 24, 2021 4:35 pm Post subject: Starts and runs, then won't |
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2017cc, Italian IDAs, 120 cam, etc etc.
It will fire right up from sitting overnight, and run great...drive it at freeway speeds (55-65mph) then shut it off, and it cranks and cranks won't start. It finally does, and runs like crap..if you feather foot it, it runs okay, but as soon as you stick your foot in it, it pops and surges, and just generally embarrases itself. Get it home, won't start. Go in the house, wait an hour or so, starts right up, runs good. Replaced the German 009 with another German 009 with new Bosch points, condensor, rotor, and cap, does the same thing. Replaced new German Blue Coil, with used German known good blue coil- same thing.. Fuel pressure steady at 3.5 PSI, where is has been for 20 years..Jets are all clean, needle and see ( the big 300 for IDAs) seem to be fine...both carbs getting plenty of fuel..what am I missing here? plugs look like coffee with cream.. _________________ 2003 Samba Chummie Winner- Best Story
"Those that matter, don't mind,
and those that mind, don't matter" |
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busdaddy Samba Member
Joined: February 12, 2004 Posts: 51121 Location: Surrey B.C. Canada, but thinking of Ukraine
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Posted: Fri Sep 24, 2021 5:25 pm Post subject: Re: Starts and runs, then won't |
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Dave wrote: |
...both carbs getting plenty of fuel.. |
Even when it's acting up?, or in the driveway after it's cooled? _________________ Rust NEVER sleeps and stock never goes out of style.
Please don't PM technical questions, ask your problem in public so everyone can play along. If you think it's too stupid post it here
Stop dead photo links! Post your photos to The Samba Gallery!
Слава Україні! |
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Erik G Samba Member
Joined: October 16, 2002 Posts: 13269 Location: Tejas!
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Posted: Fri Sep 24, 2021 5:36 pm Post subject: Re: Starts and runs, then won't |
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swirl the fuses around, and look for other not optimum electrical issues?
trans ground strap go bad? thats odd for a car that usually rips |
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evanfrucht Samba Member
Joined: July 24, 2016 Posts: 2180 Location: Laurel Canyon, CA
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Posted: Fri Sep 24, 2021 8:14 pm Post subject: Re: Starts and runs, then won't |
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Dirty carb. Bad float needle. Failing fuel pump. Dirty fuel filter. Just some obvious ideas...
Vapor lock? Fuel getting too hot? It was in the 90s here a couple days ago. _________________ 1967 Bug ( the daily rod )
1964 Fury Wagon ( the pavement shredder ) |
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Clatter Samba Member
Joined: September 24, 2003 Posts: 7537 Location: Santa Cruz
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Posted: Fri Sep 24, 2021 8:36 pm Post subject: Re: Starts and runs, then won't |
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Bad ground? Spade connectors at ignition switch or coil getting loose?
Had these things drive me nuts and it ended up just being a loose wire.. _________________ Bus Motor Build
What’s That Noise?!? |
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evanfrucht Samba Member
Joined: July 24, 2016 Posts: 2180 Location: Laurel Canyon, CA
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Posted: Fri Sep 24, 2021 11:27 pm Post subject: Re: Starts and runs, then won't |
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Check voltage to/from coil when hot and then when cold.
Old battery? Charging system funk? Yes I said funk.
_________________ 1967 Bug ( the daily rod )
1964 Fury Wagon ( the pavement shredder ) |
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earthquake Samba Member
Joined: January 10, 2008 Posts: 3984 Location: SANDY VALLEY, NEVADA
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Posted: Sat Sep 25, 2021 2:58 pm Post subject: Re: Starts and runs, then won't |
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Is your fuel vented, you could be sucking a vacuum in the tank. when you have the problem try to open the cap slowly [NO SMOKING] and see if you can hear it suck in air, be careful it can spit gas out.
eQ _________________ 74 CLASS 11 LOOK-A-LIKE
69 DUNE BUGGY
79 INTERNATIONAL SCOUT II
05 SCION XB SERIES RELEASE 2[#437]
95 Chevy C3500 dually
98 Ford E150
Link to Kelly J. Nolte 3/20/53 - 11/6/08
https://time-zonelabs.blogspot.com/p/about-kelly.html
DEATH TO CHINGERS!
[From a military recruitment poster in the novel "The Stainless Steel Rat" By Harry Harrison] |
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nsracing Samba Member
Joined: November 16, 2003 Posts: 9459 Location: NOVA
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Posted: Tue Sep 28, 2021 5:50 am Post subject: Re: Starts and runs, then won't |
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You have pic of the back of the engine bay? Let us see what you got there.
Are all the tins present in the engine bay? Any power-pulleys? |
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BIGMIKEY Samba Member
Joined: September 24, 2007 Posts: 1104 Location: North East Pennsylvania
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Posted: Tue Sep 28, 2021 6:12 am Post subject: Re: Starts and runs, then won't |
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Mine did the same thing a few months ago. Points had closed up. They were new. I Reset to .016" and started right up. Still fine.
Mike T _________________ BIGMIKEY
Deserter Series 1 project.
https://www.thesamba.com/vw/forum/viewtopic.php?t=787047&highlight=
1973 Beetle Driver, Marina Blue. |
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