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EJ22 cutting out ?

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Bone Officially Full-On Dubber

299 posts · joined Aug 2009 ·

#929913
Have just finished install of EJ22 and am finding it cut's out on a left hand turn. Once it is straight, it seems to find feul and kick back to life . We have checked wiring twice and earths ect, so it seems to be a fuel starvation issue. Engine is in a baja with a kombi tank (parcel shelf) gravity feeding a surge tank on to a vl commodore efi pump. Using the donor liberty filter as it looked newish (looks can be deceiving ). The filter is the only part not new..new but this only happens on a Left Hand Turn ! Any suggestions appreciated as only very limited EJ experience to date.

kombibob AKA: Volkswagen Type 2 Transporter Van Robert

1,698 posts · joined May 2004 ·

#929928
Hey mate, try adding a small lift pump before the surge tank.
That's my guess but saying that my split isn't running a surge tank and only cuts out if I let the fuel go too low.
Also if its easy just as a experiment try bypassing the surge tank and see if its still doing it, it may be a case of the pump emptying the tank before it can refill.
1961 swb buggy
1960 karmann ghia
1963 Single Cab: "El Concreto"
1963 bent 23 window " Frieda Samba "
1963 Eriba Faun camper " Cara Van daCamp"
2012 Skoda Octavia scout

Get down low and go,go,go

Bone Officially Full-On Dubber

299 posts · joined Aug 2009 ·

#929931
Yes it think it is a issue in the surge.. Tail pipe very sooty all of a sudden (ah oh head gasket maybe) !
Thanks I will try those options.

Joel Now containing 100\% E-Wang

9,368 posts · joined Feb 2006 ·

#929936
Bob's on the money, gravity flow at times like cornering isn't always enough to keep an EFI pump fed.

Bone Officially Full-On Dubber

299 posts · joined Aug 2009 ·

#929938
The return line goes into the surge so I thought it would always be full. I will experiment a with few options. Thanks Guy's

Klaus Custom Title Time!

1,439 posts · joined Aug 2004 ·

#930248
do some research on efi conversions , u def need a lift pump as bob said , carter or holly's are redilly avail even try a cheap facet style pump

lou0060 Wolfsburg Wizard

568 posts · joined Dec 2010 ·

#930715
what size hose is feeding the fuel pump from the tank? And where is the fuel outlet on the tank? On a left hand turn the fuel will flow to the right of the tank so if the outlet is on the left it will not get fuel. Does it do the same on right hand turns? how much fuel was in the tank?

I'm running an alloy tank with a deep collection point and baffles and I am gravity feeding thru a 1/2" hose and fittings to a Bosch pump and not having any fuel issues.
1971 karmann ghia Cabrio - Cruising 👍
1963 beetle Sunroof - gathering dust 🥲
1968 race beetle - twin turbo Subaru - stress relief 😁
1960 beetle - old school low & slow 😏

Joel Now containing 100\% E-Wang

9,368 posts · joined Feb 2006 ·

#930758
Bone wrote:The return line goes into the surge so I thought it would always be full. I will experiment a with few options. Thanks Guy's
That also creates another issue, the fuel returning picks up alot of heat from the fuel rails and if your system is all rubber hose it cant shed any heat like metal lines under the car in the roaddraft would do so the pump keeps recirculating that hot fuel.

Fuel has a low boiling point which exaggerates the problem, having the lift pump helps circulate the fuel back into the main tank to cool it off better.

Bone Officially Full-On Dubber

299 posts · joined Aug 2009 ·

#930803
Joel wrote:
Bone wrote:The return line goes into the surge so I thought it would always be full. I will experiment a with few options. Thanks Guy's
That also creates another issue, the fuel returning picks up alot of heat from the fuel rails and if your system is all rubber hose it cant shed any heat like metal lines under the car in the roaddraft would do so the pump keeps recirculating that hot fuel.

Fuel has a low boiling point which exaggerates the problem, having the lift pump helps circulate the fuel back into the main tank to cool it off better.
Joel I'm going to try the fuel return to the main tank above instead of the surge tank and put in a larger feed line from main tank to surge as lou0060 suggested. I'm trying not to use a small lift pump if I can help it . (one less thing to go wrong) If this fails, then I will fit the lift pump. Will post outcome in the next day or so when I get time to change. ( I desperately need a hoist at home)

Bone Officially Full-On Dubber

299 posts · joined Aug 2009 ·

#930872
Fixed !! Return now go's to main tank and tapped a brass (8mm) fitting into the original outlet and bingo, no more cutting out on LH turn. This larger feed line still just gavity feeds the 1 lt surge below it and it has fixed the problem seemingly.

kombibob AKA: Volkswagen Type 2 Transporter Van Robert

1,698 posts · joined May 2004 ·

#930883
cool🙂 so when are we hitting the tracks aroud here?
1961 swb buggy
1960 karmann ghia
1963 Single Cab: "El Concreto"
1963 bent 23 window " Frieda Samba "
1963 Eriba Faun camper " Cara Van daCamp"
2012 Skoda Octavia scout

Get down low and go,go,go

Bone Officially Full-On Dubber

299 posts · joined Aug 2009 ·

#930899
kombibob wrote:cool🙂 so when are we hitting the tracks aroud here?
Very soon. Also a beach run soon.

Bone Officially Full-On Dubber

299 posts · joined Aug 2009 ·

#933656
Bone wrote:Fixed !! Return now go's to main tank and tapped a brass (8mm) fitting into the original outlet and bingo, no more cutting out on LH turn. This larger feed line still just gavity feeds the 1 lt surge below it and it has fixed the problem seemingly.
Its back !! Problem does not happen when low in fuel, but put 20 ltrs in it and Lh bend cuts out again. Drained 20 ltrs out, and no problem in the paddock. put fuel back in and straight away cut out on left hand turn. No problem with wiring as wont do it with bugger all fuel in it even up lots of throttle. Talked to efi guy we know and he said "time to go home so your on your own" (had no idea). seems the weight of the 20 ltrs of fuel in it (tank on parcel shelf) and it all goes to crap, only on left hand turn not rht. I am stumped!

Bone Officially Full-On Dubber

299 posts · joined Aug 2009 ·

#934957
The problem was obvious now I've sorted it ... The vapour line I set up high on the rhs of tank would suck fuel in (left hand bend) when near full tank causing the engine to flood !! I dont even run the surge any more just a 1/2' feed straight to the pump and no problems. It was just the vapour line all along..Do you even need the subaru vapour line in a already well vented tank ??? Feed back appreciated.

h fractals - an ever changing lifestyle

7,671 posts · joined Feb 2005 ·

#934961
good to read it is on its way to be sorted.. DI coming up I hear?
well if we let matt know now when he might get it started in time 😂
fractal geometry; the inner most limits of mind altering abuse

Fantasy http://seventhchronicle.com

Z = Z2 + C1/r = 1/0 = infinity

Barrels www.barrelman.com.au

VW Workshop - aircooledgarage.com.au
allcooled.com.au

vlad01 Compulsive Aussie Vee Dubber

4,270 posts · joined Jun 2010 ·

#935164
Bone wrote:The problem was obvious now I've sorted it ... The vapour line I set up high on the rhs of tank would suck fuel in (left hand bend) when near full tank causing the engine to flood !! I dont even run the surge any more just a 1/2' feed straight to the pump and no problems. It was just the vapour line all along..Do you even need the subaru vapour line in a already well vented tank ??? Feed back appreciated.
legally i am pretty sure you have to, guess you then need a liquid vapor separator before the vapor line first like most cars do.

71 notchback,
Past owner of, 70 NB, 73 SB and 72 FB TLE

h fractals - an ever changing lifestyle

7,671 posts · joined Feb 2005 ·

#935165
what no berry biting 😂
n cherries are in season n all
fractal geometry; the inner most limits of mind altering abuse

Fantasy http://seventhchronicle.com

Z = Z2 + C1/r = 1/0 = infinity

Barrels www.barrelman.com.au

VW Workshop - aircooledgarage.com.au
allcooled.com.au