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 wombatventures
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| posted on November 5th, 2016 at 10:20 AM |
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Type 3 Carbs flood after engine stop
Over the past few months I've had issues with the 72 Notch.
Mostly fuel related.
This week I put the tank back in after cleaning it and the filter in the outlet.
Last night I put in a new fuel pump.
This morning when I got it started and running, as soon as I switched the ignition off fuel started trickling into the carbs then flowing which
flooded them.
I've had an issue with starting the motor after it has sat for a few minutes after switching off for a while now, so it seems like it must have been
happening with both previous fuel pumps as well.
The Gregorys manual mentions a shut off valve in the fuel pump or carb. As this is not the original dismantlable pump that would have come with the
car would I have to put a fuel shutoff valve in the line from the pump to the carbs? Or is there a problem with the carbs?
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adlbeetle66
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Under the car.........again!
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| posted on November 5th, 2016 at 11:12 AM |
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There is two different pump rods you can get - a long one and a short one.
There could be a possible problem if you're getting too much pressure with the long one?
I'm hoping that makes some sense to you..
Cheers
Denver
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Special Air Service
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| posted on November 5th, 2016 at 11:23 AM |
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shut off valves are normally in the carby.....
[size=5] Calling all NSW Mid North Coast Veedubbers
Click Below [/size]
[size=6]Mid North
Coast VW [/size] |
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 vw54
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| posted on November 5th, 2016 at 01:34 PM |
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check the needle and seats in the carbies
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wombatventures
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| posted on November 5th, 2016 at 03:11 PM |
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Would that be the "electro-magnetic pilot jet shut off valve"?
If there is no connection to them both would that be the problem? Guess I'll have to check that they are working.
Any tips on how to test them
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vw54
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| posted on November 5th, 2016 at 03:22 PM |
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turn ignition on and pull the lead on and off you will here the solenoid clicking in n out
but that don't have anything to do with fuel flow
is that china pump you have installed might not have the check valve in that sitting properly
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wombatventures
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| posted on November 5th, 2016 at 07:29 PM |
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Solenoids are working.
Pump box is labelled Brazillian. A Brosol. Does this type have a check valve?
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vw54
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| posted on November 5th, 2016 at 11:32 PM |
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they all have a check valve to stop flow
are you parking he car flat and level
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wombatventures
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| posted on November 6th, 2016 at 10:25 AM |
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It's up on jack stands at the moment but is level.
Fuel even runs in with the line off the pump and a bung in the end. Tried the old worn pump and it does the same.
Will probably decide to give the carbs a good overhaul before long anyway. Will leave it for now.
Just needs a lot of cranking to clear the fuel before it starts.
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vw54
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| posted on November 6th, 2016 at 10:56 AM |
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check the gasket spacer under the needle n seat valve or add extra spacer this will lower the float level and ensure the seat stop the fuel flow
take the fuel inlet line to carbies of the pump and fill with fuel after you have adjusted the float level and hold up above the carby level high
so gravity allows fuel flow to carbies this will determine if the are leaking or not
if not leaking then something wrong with the pump
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wombatventures
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| posted on November 6th, 2016 at 02:05 PM |
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Cool. Will follow that up. Thanks
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modnrod
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| posted on November 6th, 2016 at 08:04 PM |
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Sometimes when all else fails to make the 50 yr old stuff act like new no matter how much you try, other methods might be considered.
Like an inline LPG-style fuel cut-off solenoid just after the fuel pump.........
http://www.ebay.com.au/itm/LPG-SOLENOID-LOCK-OFF-VALVES-FUEL-CUT-OFF-SWITCHES...
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Morts
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| posted on November 6th, 2016 at 09:15 PM |
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I have had a few fuel related issues with a few cars of late. Have you only idled the car or have you driven it?
A friend and I were working on my ghia 36hp and it idled beautifully for a short time before flooding. Checked the float level and that was okay so
worked out we were getting too much fuel pressure, added another gasket to the fuel pump and hey presto!
My daughters '73 fastback has also had a lot of fuel issues in that it is using a lot of fuel and has a horrible fuel smell but no obvious leaking.
Pulled the carbs off and where the two faces meet was noticeably warped and buckled so have acquired two replacement carbs and now getting them
re-kitted before trying again.
PS: I am also looking for the rubber spilltray and outer seal that goes where the fuel filler and fuel flap is for her car and the outer rubber seal.
Boris has the spill tray but no seal and ISP West has neither - any leads?
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vw54
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| posted on November 6th, 2016 at 10:11 PM |
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Try VVDS
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wombatventures
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| posted on November 7th, 2016 at 06:18 AM |
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Got the old fuel pump out last night, the one that was on the car when we got it, that I changed early in the year. I'm going to give that one a try
today before I pull the carbs off.
I have tried taking the outlet pipe from the fuel pump off as soon as I turned the motor off to see if the fuel still runs into the carbs with no fuel
pump pressure. It does still run in.
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vw54
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| posted on November 7th, 2016 at 06:58 PM |
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Ok so if fuel still running from pump the check valve in the pump is stuffed
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Morts
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| posted on November 7th, 2016 at 08:37 PM |
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| Quote: | Originally
posted by vw54
Try VVDS
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Thanks, but that is what I meant by Boris!
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wombatventures
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| posted on November 14th, 2016 at 07:08 AM |
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Pulled both carbs out Yesterday. Crap in right carb needle and seat (see photo). Nothing visible in left carb but cleaned out anyway. Haven't altered
anything settings wise but will adjust once I get a couple of rebuild kits.
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vw54
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| posted on November 14th, 2016 at 09:31 AM |
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That will do it every time
Looks like you need an in line filter before the pump
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wombatventures
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| posted on November 15th, 2016 at 05:43 PM |
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Its got an in line filter after the tank, tucked up in the space near the auto trans. There is also the mesh filter in the tank. I'm tipping this has
got in the line when the fuel pump has been disconnected to prime the line when the old pump was not working properly, or when the fuel pump has been
changed.
Have to put some fuel in the car to see if the flooding has stopped. Will get on to that tomorrow.
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