Brandstof toevoer sisteem : 7MGE

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pch356
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Brandstof toevoer sisteem : 7MGE

Post by pch356 »

Ek het asb raad nodig van al julle Hilux gurus ;-)

Ek het so 'n paar maande gelede 'n 7MGE ombouing voltooi op my 1989 Hilux DC 2.2.

Na bietjie meer as 2000 kms, blyk dit dat meeste van die klein groeipyne uitgestryk is en ek is heel beindruk met die bakkie tot dusver :clap:

Die een probleem wat ek nie opgelos kan kry nie is dat die bakkie sukkel om te vat nadat hy 'n rukkie gestaan het. Hy sal vat en paar sekondes "idle" en dan vrek. Dit vat so drie to vier keer se probeer slae voor hy behoorlik vat. As hy skuins gestaan het, is dit nog erger.

Ek is dom met die tipe van goed, maar dit wil my voorkom of die brandstof uit die sisteem uit terug loop tenk toe en dan weer teruggewerk moet word die volgende keer as jy die enjin aanskakel.

Ek het die standaard toevoer pypie (6mm) uit die petrol tenk laat vergroot na 10mm om by die pomp se 10mm invoer te pas. Van die pomp af gaan daar 10mm pyp deur 2 aluminium filters en van daar 8mm pyp na die fluel rail op die enjin. Die "return pyp" tenk toe is vergroot na 8mm.

Al die filters op die sisteem, pype en pomp is nuut geiinstalleer, asook 'n nuwe fuel pressure regulator. Die pomp is 'n Bosh (kan ongelukkig nie model onthou nie, maar een net groter as die 2.1 VW kombi se pomp) met 'n druk van ongeveer 6 bar.

Het julle idees oor wat ek kort op die sisteem om die petrol in die bakkie se keel te hou ? Is daar dalk 'n tipe van 'n "non return valve" wat kort?
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Gunta
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Re: Brandstof toevoer sisteem : 7MGE

Post by Gunta »

Hi Wessels, I had the same problem. There are a few things to check.
1. Check that the tank's breather is open because sometimes there is no air in the tank and the pump is trying to pull fuel against a suction. After you have driven the bakkie and you stop, open the fuel cap and see if it sucks in air. If it does then that's your problem. Make sure your breather pipe runs up between the cab and the bak and put a small fuel filter on it and support it at the highest point.

If it still does it then you need to check the pressure regulator on the fuel injection at the back of the motor. It is a round thingy with a grey plastic top. That can be faulty. I changed mine and it runs like a dream. you can get the part from toyota. :drinks: :drinks:
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pch356
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Re: Brandstof toevoer sisteem : 7MGE

Post by pch356 »

Thanks Gunta,

Will check the breather and regulator. As far as I could determine, the tank's breather seemed to be fine, but I will just make double sure.
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Re: Brandstof toevoer sisteem : 7MGE

Post by Spartan »

Wessel kyk of die gaatjie in die cap deur is anders gaan jy ook vacuum trek, veral off-road, as hy nie is nie boor hom net deur. :thumbup:
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Re: Brandstof toevoer sisteem : 7MGE

Post by Gunta »

Did you come right? :scratch:
Worry about the things you can do something about, If you can't don't worry.
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Re: Brandstof toevoer sisteem : 7MGE

Post by pch356 »

Thanks for the advice guys. I checked the breather. All seems fine there. Will just check the hole in the cap as well.

The regulator you are referring to Gunta, is that the fuel pressure regulator? If so, I replaced it with a brand new Toyota product whilst doing the conversion (took me a while to remember that LOL)

I drove the Hilux for about three days last week to work and back and also noticed that while stationary and engine idling smoothly it will suddenly start to idle unevenly (even sometimes sounds as if it runs only on on cylinder) and then either even out again as if nothing is wrong or completely cut out. If you start it again, it will do so without hassles and idle smoothly again. It is almost if the system gets a sudden tiny airlock which works its way through the pipes till it reaches the injectors - what is strange if this is the case, is that the pump does not cavitate.
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Re: Brandstof toevoer sisteem : 7MGE

Post by Gunta »

Yes it is the fuel pressure regulator. What management system are you using?
sounds like it might be running a bit lean. could also be a vacuum pipe that has a hole in it.
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Re: Brandstof toevoer sisteem : 7MGE

Post by pch356 »

Thanks, will also check vacuum pipes.

I'm using a Dictator management system
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Re: Brandstof toevoer sisteem : 7MGE

Post by Gunta »

I was also runing the dictator and had similar problems. Have you had it set properly and by whom? I have since gone back to the OEM management and I bought a airflow meter from Toyota and it works like a bomb. I had to many problems with gotech and dictator. They work in a race car but are not practical for what we are doing. How is your fuel consumption?
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Re: Brandstof toevoer sisteem : 7MGE

Post by KOBUSL »

Ons gebruik 2 pompe. Kleintjie ( lae druk ) in die tenk en sy oupa ( hoe druk ) verder aan. 50,000 kilo's later, geen probleme nie. As jy nou nie die hekpaal in die pad bytel nie............................
Word te vinnig oud en te stadig wys.
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Re: Brandstof toevoer sisteem : 7MGE

Post by Spartan »

Gunta wrote:I had to many problems with gotech and dictator. They work in a race car but are not practical for what we are doing.
Persoonlik dink ek jou goed was nie ordentlik gestel nie, my bakkie, my broer, my pa, broer se 4 pals en nog n hele paar ander se bakkies loop soos n droom met die aftermarket ECU's, ken nie dicktator nie so ek kan nie saam praat daar nie maar vir wat ons die goed gebruik kan ons ook nie kla nie maar aan die anderkant stel ons self ons goed. Oja en ek ry off-road en ek kan n 330 beemer laat hardloop vir sy geld :twisted: maar my bakkie is nie n racekar nie :cooldude:
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Re: Brandstof toevoer sisteem : 7MGE

Post by Gunta »

Hey Jaco, I like your new avatar. I know you are happy with the gotech. What did it cost you to fit the 2jz with the engine and do you know what power you are getting on it. :)
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Re: Brandstof toevoer sisteem : 7MGE

Post by Spartan »

Ek sal as ek nou by die huis kom n power run met hom gaan doen dan sal ek jou kan sê. Ek het 70K vir die bakkie betaal en seker nog 70K gespend op die wa maar ek moet vir jou sê dat omdat alles self gedoen was is al die labour segeld gespend op net Toyota original spares, al wat ek kan sê is dat daai Hilux net n plesier is en so sterk soos n bees is. Die manne dink ek is windgat maar hulle kan maar kom met hulle 4L V6's en V8's. Daar is niks gekrap nie al wat anders is is die branch verder stock van sy ma af, NA dit werk net beter, minder goed wat kan breek.
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Re: Brandstof toevoer sisteem : 7MGE

Post by OOOOMS »

Die manne dink ek is windgat
Jy dink......? Ons weet..... :lol: :lol: :lol:
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Re: Brandstof toevoer sisteem : 7MGE

Post by Spartan »

OOOOMS wrote:Jy dink......? Ons weet.....
Want ek het n Hilux wat kan :twisted:
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Re: Brandstof toevoer sisteem : 7MGE

Post by OOOOMS »

Spartan wrote:
OOOOMS wrote:Jy dink......? Ons weet.....
Want ek het n Hilux wat kan :twisted:
Janee! :thumbup: :thumbup: :thumbup:
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Re: Brandstof toevoer sisteem : 7MGE

Post by Gunta »

Jaco, when are you back in town? I want to come and see what you have done.
I have spent around 100k on mine too.
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Re: Brandstof toevoer sisteem : 7MGE

Post by Spartan »

Ek vlieg die 29 September uit, jy is enige tyd welkom ek sal jou my tel # pm :thumbup:
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Re: Brandstof toevoer sisteem : 7MGE

Post by TOYOTA 4YEFI »

Wessel die probleem is dat waneer jy n ruk gery het word die motor natuurlik warm en saam met dit word die fuel rail ook wark maar die koue petrol wat daar deur floei hou die fuel rail koud wat dan kebuer waneer jy stop is dat die petrol in die fuel rail begin soms kook en verdamp omdat daar nie meer vloei van koue petrol is om die fuel rail koud te hou nie en waneer jy dan weer die motor start vat hy maar net vir n ruk want daar is nie genoeg brandstof nie want die fuel rail moet hom self eers weer bloei

gaan kyk of die "prime tyd" van die pomp lank genoeg is op setup van jou emu
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Re: Brandstof toevoer sisteem : 7MGE

Post by Spartan »

TOYOTA 4YEFI wrote:Wessel die probleem is dat waneer jy n ruk gery het word die motor natuurlik warm en saam met dit word die fuel rail ook wark maar die koue petrol wat daar deur floei hou die fuel rail koud wat dan kebuer waneer jy stop is dat die petrol in die fuel rail begin soms kook en verdamp omdat daar nie meer vloei van koue petrol is om die fuel rail koud te hou nie en waneer jy dan weer die motor start vat hy maar net vir n ruk want daar is nie genoeg brandstof nie want die fuel rail moet hom self eers weer bloei

gaan kyk of die "prime tyd" van die pomp lank genoeg is op setup van jou emu
As dit is wat gebeur het jy nie die regte pompe in nie :bye:
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Re: Brandstof toevoer sisteem : 7MGE

Post by pch356 »

Jis dankie ouens vir die hope raad .... tyd was ongelukkig die afgelope twee weke nie aan my kant nie en die Hilux moes eenkant toe staan. Ek sal die langnaweek wat voorle al julle raad vat ek die setup van 'n kant af bestudeer dat ek die spulletjie in die bed kan sit vir een en vir altyd... ;-)

Wat ek wel kan se die slag as die bakkie ooppad vang, loop hy soos 'n droom sonder om 'n "beat" te mis ...

EK sal julle op hoogte hou van my vordering.
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