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 Dazz
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| posted on March 16th, 2014 at 09:14 PM |
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Need some carb advice
Got the bug on the road finally. Drove it today and it will accelerate initially but won't rev at all. It feels as though it's starving when I try
to rev it but will run if I pump the accelerator pedal (do they have an accelerator pump?). Any suggestions where to start? Maybe even fuel pump?
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 barls
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| posted on March 16th, 2014 at 09:48 PM |
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Check you fuel filter
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Dazz
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| posted on March 17th, 2014 at 06:52 AM |
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Fuel filter is clear but will replace it anyway
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 Bizarre
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| posted on March 17th, 2014 at 07:06 AM |
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Solenoid cut off not connected?
Idle jet blocked ?
Futue te ipsum!!!
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Dazz
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| posted on March 18th, 2014 at 10:26 AM |
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Update, it just died on the road today. Cut out and wouldn't fire back up. Tow truck home and it fired straight up in the garage. Is there a strainer
in the float bowl that could be blocked? Seems funny how a trip home may have losened some blockage up?
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Anthiron
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| posted on March 18th, 2014 at 11:27 AM |
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- Fuel pump diaphram ok? Maybe take the line off at the carby end and disconnect the coil. Turn the engine over by hand a couple of times to see that
fuel pulses out of the line.
- Drain the float bowl and remove the main jet to see if its clogged
- leave the ignition on but dont start the car. take the power wire off the cut off solinoid and just tap it on the terminal. You should hear a click
as the solinoid engages
- Unscrew the solenoid and check that the jet is clear
- to check the air correction jet you will need to take the top off the carby so I would try the other stuff first. but once you remove the top you
will see the jet to check.
Yes there is an accelerator pump but it sounds like yours is functioning.
something Odd that I have found before to check.......is the fuel spout even there? Should be a little brass tube bent around to squirt fuel down the
throat of the carby.
62/60 model bug eye baja bug, (Full Build in Progress)
1974 Chevrolet Luv
1970 MK2 Ford Cortina GT
1979 Yamaha RX125 Two Stroke tracker project.
2004 Harley Davidson Sportster XL Custom
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mgiles
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| posted on March 18th, 2014 at 11:42 AM |
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Sure its not flooding? Which is why you could start it a little while later?
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bajachris88
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| posted on March 18th, 2014 at 11:46 AM |
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Whats the engine / carb?
if its a dual port 1600 with stock manifold, check boots for cracks (on manifold), or pipes on manifold / carb that aren't blocked off.
I'm thinking vacuum leak.
The pump of the accelerator provides the initial fuel squirt to satisfy initial acceleration, and the throttle butterfly closed at idle provides just
enough vacuum to obviously maintain idle fuel delivery, but as soon as you open that butterfly and fuel pump finishes what its doing, it then starves
(by the sounds).
Your ability to not restart again can support this. Warm engine restart means the choke will most likely be open (not closed like a cold start),
reducing 'vacuum' pressure in manifold.
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Dazz
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| posted on March 18th, 2014 at 12:40 PM |
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Fuel solenoid definitely clicking when tapping connector on and off terminal.
Fuel pump pulsing and squirting fuel into a catch bottle.
It seems to get progressively worse the longer it's driven so maybe there is some scale or shit in the bowl that is blocking a jet progressively as I
drive along.
It's a 1600 twin port with stock superbug carb so am I right in saying its a 34 pict?
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Anthiron
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| posted on March 18th, 2014 at 12:43 PM |
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It will say what kind of Solex it is on the side of the carb.
But yes a stock super would have a 34.
when the engine is warm and you take off the air cleaner is the choke open or closed?
62/60 model bug eye baja bug, (Full Build in Progress)
1974 Chevrolet Luv
1970 MK2 Ford Cortina GT
1979 Yamaha RX125 Two Stroke tracker project.
2004 Harley Davidson Sportster XL Custom
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Dazz
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| posted on March 18th, 2014 at 01:11 PM |
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Choke is open when hot. Just drained float bowl twice and there is a shit load of fine dust, and small flakes of scale in it. Anyone know of someone
on the nsw central coast that has carby kits?
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Anthiron
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| posted on March 18th, 2014 at 01:30 PM |
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Mick Motors or ClassicVeeDub via snail mail is your best bet. Mick motors would have it to you in 2 days.
62/60 model bug eye baja bug, (Full Build in Progress)
1974 Chevrolet Luv
1970 MK2 Ford Cortina GT
1979 Yamaha RX125 Two Stroke tracker project.
2004 Harley Davidson Sportster XL Custom
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Dazz
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| posted on March 18th, 2014 at 01:41 PM |
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Classic vw has a brand new solex 34 pict listed for $140. Hardly worth rebuilding 1 at that price
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Anthiron
A.k.a.: Nicko McKay
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| posted on March 18th, 2014 at 02:33 PM |
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If your origonal German Carb is still in decent shape then I would rather an OG Carb than a Brazillian or Mexican remake any day.
62/60 model bug eye baja bug, (Full Build in Progress)
1974 Chevrolet Luv
1970 MK2 Ford Cortina GT
1979 Yamaha RX125 Two Stroke tracker project.
2004 Harley Davidson Sportster XL Custom
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Dazz
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| posted on March 18th, 2014 at 03:08 PM |
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Very good point
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kylandpl
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| posted on May 5th, 2014 at 09:39 PM |
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Sorry, you have probably solved this issue by now, but if you still need a carby rebuild kit, try:
A J Cody VW
West Gosford
4325 7911
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