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Dave
Samba Elder
Joined: July 11, 2002
Posts: 2693
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..
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busdaddy
Samba Member
Joined: February 12, 2004
Posts: 51124
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?
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Erik G
Samba Member
Joined: October 16, 2002
Posts: 13270
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.
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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..
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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.
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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
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nsracing
Samba Member
Joined: November 16, 2003
Posts: 9461
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
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Deserter Series 1 project.
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