2L FUEL PUMP ISSUE

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Cyndi Kritzinger
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2L FUEL PUMP ISSUE

Post by Cyndi Kritzinger »

HOWDY ALL!

SO I HAD A FEW ISSUES AND IT TURNED OUT THAT MY FUEL PUMP WASN'T SUPPLYING FUEL TO THE ENGINE. I COULDN'T LOCATE A PUMP LOCALLY AND SO INSTALLED AN ELECTRIC "HUCO" LOW PRESSURE PUMP. CYNDI AND I DID A MUSIC TOUR IN DECEMBER AND THE FUEL USAGE WAS BESERK. WE DID HAVE THE CARBS SET BY A PORSCHE WORKSHOP PRIOR TO OUR LEAVING SO WE WERE QUITE SUPRISED AT THE HIGH CONSUMPTION. 20L PER 100KM.
WE TRIED A FEW THINGS INCLUDING A BYPASS BUT TO NO AVAIL.
I EVENTUALLY IMPORTED A NEW 2L FUEL PUMP FROM THE STATES AND SPENT THE WHOLE MORNING TODAY INSTALLING THE THING (NOT SO EASY STUCK IN THE BACK THERE) ONLY TO FIND THAT IT WASN'T PUMPING ANY FUEL. SO BEFORE YOU ASK........
YES THERE IS PLENTY FUEL FLOWING FROM THE TANK.
YES, I TRIED THE PIPES IN BOTH CONFIGURATIONS; IN AND OUT.
YES, I SWUNG THE ENGINE WITH THE PIPES ON ONE AND THEN THE OTHER TO SEE IF ANY FUEL WAS COMING THROUGH.

NADA.

DO YOU THINK IT'S POSSIBLE THAT THE PIN IS TOO SHORT TO MANIPULATE THE LEVER OF THE PUMP?
COULD THE CAM BE THAT WORN OUT?
ANYONE EXPERIENCED THIS BEFORE?
I'M THINKING THAT PERHAPS I SHOULD SHAVE A BIT OFF OF THE SPACER BETWEEN THE PUMP AND BLOCK.

ADVICE PLEASE.

MARK


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retrovan
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Re: 2L FUEL PUMP ISSUE

Post by retrovan »

Take out the fuel outlet pipe and the little filter thats in the entrance to the outlet, then drain the tank to get all the junk out the tank.

No pump can pull fuel through a blocked filter.

You will then find that the bypass and the new pump will work.

Good luck

Herman
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Cyndi Kritzinger
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Re: 2L FUEL PUMP ISSUE

Post by Cyndi Kritzinger »

THERE IS NO PROBLEM WITH FUEL FLOW FROM THE TANK TO THE PUMP.
THE PUMP IS NOT PUMPING FUEL.
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Re: 2L FUEL PUMP ISSUE

Post by retrovan »

Cyndi Kritzinger wrote: Mon Feb 12, 2018 4:18 pm THERE IS NO PROBLEM WITH FUEL FLOW FROM THE TANK TO THE PUMP.
THE PUMP IS NOT PUMPING FUEL.
Have you got the pipes the right way around, as if your tank is full fuel should flow through the pump even if its not pumping.

If it does not do that then you have a blockage or incorrect connections.

My type 4 Bay runs without a fuel pump powered up or working, just on gravity from a full tank through the pump to the carbs, that is why You need a shut off electric valve to stop fuel flow when the float is sticky.

Herman
1952 Split Beetle 1835cc
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Cyndi Kritzinger
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Re: 2L FUEL PUMP ISSUE

Post by Cyndi Kritzinger »

I HAVE TRIED THE PIPES BOTH WAYS....... NOTHING.
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Re: 2L FUEL PUMP ISSUE

Post by Tony Z »

T4 fuel pump in the stock location??
As far as I know, you cannot buy a replacement T4 pump that fits in the stock position. I searched for one once for someone else and even though you find them listed, not one fits. End result was going electric.
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Re: 2L FUEL PUMP ISSUE

Post by Cyndi Kritzinger »

YES, REPLACEMENT PART TYPE 4, 2L FUEL PUMP NOW AVAILABLE.
FITS PERFECTLY IN THE ORIGINAL POSITION (OF COURSE A PAIN IN THE BUTT TO GET IT IN THERE. PROBABLY BECAUSE YOU SHOULDN'T BE ENTERING FROM THE REAR).
IT'S BEEN MENTIONED THAT AN AIRLOCK COULD BE THE CAUSE OF THE NON PUMPING AND THAT I SHOULD FIRST PRIME THE PUMP.
WHEN I'M IN THE MOOD, I SHALL GIVE THAT A GO. I CAN TELL YOU THAT AFTER MY STRUGGLES AND TIME WASTING YESTERDAY, THAT MAY TAKE ME A WHILE.
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Re: 2L FUEL PUMP ISSUE

Post by Madbones »

Hi Mark,
Just spent the last 4 days in my new/old Autovilla from CPT to JNB with a brand new 2L motor.
Stock standard twin carb motor but I have the Facet electric fuel pump fitted.
I also purchased a spare one from Midas for about R600 and installed the new one and this motor runs perfectly.
The tanks have crap in them but I changed the filter a few times, again no problems.
On the last day I did 900 kms in 14 hours (wind in NC) and the motor never missed a beat with the Facet pump. Max speed 102 down hill :D
I had a few problem initially with the engine missing in 4th or a ""choof" noise but found the air filter onto the top of the carb came loose so the carb was pulling too much airon one side. Re-seated and all running fine.
Good luck.
Richard
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Re: 2L FUEL PUMP ISSUE

Post by Cyndi Kritzinger »

THANKS RICH. LOOKS LIKE I'LL NEED IT.
I DON'T HAVE A PROBLEM WITH THE WAY THE BUS IS RUNNING AS SUCH; IT'S JUST THE HECTIC CONSUMPTION.
I KNOW IT SHOULD BE BETTER AND HOPING THAT BY FITTING A MECHANICAL PUMP AGAIN IT WILL SORT IT OUT.
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Re: 2L FUEL PUMP ISSUE

Post by Madbones »

Understood and yes I was running at 20L per 100 kms :shock:
If you can keep the performance and get better consumption please share.
Ciao
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Re: 2L FUEL PUMP ISSUE

Post by Madbones »

So according to the original Autovilla 2L road test the following numbers were posted:-
80kms = 12.8 L/100 kms
90kms = 14.5 L/100 kms
100kms = 16.4 L/100 kms

So agree that for a kombi you should be lower than the above.
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Re: 2L FUEL PUMP ISSUE

Post by sean »

It’s very unlikely that it’s the fuel pump causing this.

There is also a lot more to the carbs than simply just setting or balancing them. The solex carbs have had 40 years worth of abuse. Almost all faulty or inefficient twin solex carbs I have stripped have the incorrect jets fitted, but don’t believe the size stamped on the jets. Quite often they have been drilled or reamed open. This must be checked.

The float level is also very sensitive. You may find yours was boarder line and since having a little extra pressure from the new pump it’s caused a carb or both to perculate. Add another washer under the needle and seat to help avoid this if it is the case.

Air cooled motors are not the most efficient and fuel economy varies hugely depending on weather conditions and terrain, but an average of between 7km/l to 9km/l is about normal. Both my 79 Autovilla’s can drive to JHB with only one fuel stop, provided conditions are good. On a stretch between JHB and Bloem I achieved 10,3km/l with wind from behind.

The 2l motor is certainly the biggest consumer of fuel in the air cooled range, but 5km/l is indicating there is something very wrong.

Last weekend Paul and myself both drove twin port single cab fleetline kombis to George, at the same speed and filled up at the same spots. Both were running well. When I filled up 30l his one took nearly 40l. His one has one of those new Chinese carbs and my one an original Solex, but I had spent substantial time trying to get the carb 100%. It shows you how much a difference it makes.
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Cyndi Kritzinger
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Re: 2L FUEL PUMP ISSUE

Post by Cyndi Kritzinger »

I'M WITH YOU SEAN.
SO SOME OTHER THINGS TO CONSIDER......
I HAVE ALREADY DONE THE TRICK WITH THE WASHERS.
YOU CAN SEE BLACK SMOKE COMING OUT OF THE EXHAUST.
THE INTAKE MANIFOLD ON THE LEFT (PASSENGER SIDE) IS ALWAYS DAMP WHILST THE ONE ON THE RIGHT ALWAYS BONE DRY.
THE BUS DRIVES OK; JUST THIRSTY.
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Re: 2L FUEL PUMP ISSUE

Post by retrovan »

@sean, Around December, Mark made a turn by me, and I noticed he had a high pressure pump on his bus.(3 to 8 Psi)
He is now trying to reduce the pressure as the float are being forced open and the fuel is pouring down the manifold.
With a manual pump or a Facet low pressure he should be able to fix this problem.

The only problem with the Facet, is that they inconsistent with pressure and could run from 1.8 Psi to near 3.5 Psi which could be to high for an old float to handle.

My Weber do not like pressures above 2.5 Psi so I had to import the Huco 133010 as the local agent only stock the 144010 which is an 3 to 8 Psi, which is too high for Solex or Weber.

Huco low pressure 12v fuel pump 133010
Description
12 V Positive or negative earth fuel pump made in Germany.
Supplied with Unions & Mounting Bracket.
Suitable for use in standard road, Fast Road, Rally and Race cars with engines producing up toapprox. 160 BHP.
Specification:-
Pressure 2.1 PSI
Flow 27.5 Gallons per Hour (125 Litres per Hour)
Union fuel pipe size 5/16 inch / 8mm
This pump is a suction type and designed to be fitted in the engine bay of the vehicle.
This pump is ideal for use with Dellorto or Weber carburettors, the low pressure eliminates the need for a pressure regulator.
Manufacturers part number 133010
Price approx. 57 Ponds UK


Good luck Mark.
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1968 Fastback 2Lt.type4
1972 Low Light Bay Panel Van 2Lt type 4
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2020 MeFusco Beetle Truck 2Lt type 4
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Re: 2L FUEL PUMP ISSUE

Post by slak »

Use that same high pressure pump and just get a proper fuel pressure regulator not a empi crap one
they are usually available from V8 shops and will keep the pressure constant as soon
as your fuel pressure fluctuates U are going to have a problem setting up your carbs properly
U Only Live Once Right !!!
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