Connecting external and internal fuel pumps together?

[mazamwarraich]

A O A

Syed as u know i also changed mine fuel pump of my cultus. its working fine for me in my cultus so far. i don't know about future. one modification also done by my mechanic in it. and its genuine one intank fuel pump casting me 4200/- modification he did is that he gave connection from cng switch to fuel pump. when i switch to fuel petrol it start working. other wise it will remain off. as its said by mechanic that fuel pump keep running even u r on CNG and if ur petrol tank is empty it will burn or it will die. this majority of mechanic theories. i don't know its correct or false. he only ask me to bring 1 meter wire to gave connection. he did it under dash board.
rest u know already that i serviced my carborator from tariq road. they did it fine. my

[shqamar]

hey mazamwarraich walaikum asalam ,
at the momemt i am in a fedup dillema i had spend lots of money but problems seems not to located i already service the carburator twice not with A Rehman autos because we discussed that later and after servicing the carburator twice it never feel it was a carburator issue i felt it was a fuel pump issue i change the intank fuel pump and put a inline fuel pump but i wasnt impressed with the performance some time it feels that the pump stops working so i keep going back to fuel pump guy and he politely changing the inline fuel pump to new ones but with the same korean brand but after changing 4th one i had the verdict it may be the pressure issue any how to cut it short now the car doesnt stop the way it used to stop after few kms but car still stops some time it takes jerks and than stop but it do start after that i went to several mechanics and experts here says i need to find a old intank fuel pump that serves low pressure max 13 psi so i will go to shershah soon to find out it i am able to search for one or i have a spare cultus old working one lying around but i am not sure it i put that one again as i have heard a lot of complains about cultus intank fuel pump .

[shqamar]

lets hope for best fingers crossed :S

[Sharo53]

can you upload a pic?
so we can see in what way you installed it
i also used about three inline fuel pumps for my charade bt i dont think so they even give pressure near 10psi..
plz upload a pic of ur engine bay...

[shqamar]

[shqamar]

here u go sharo53 i am posting a picture of a inline fuel pump i installed .

[Sharo53]

the installation seems perfect..
but this is not like those which i used...
is it chines? near about 850?
i'll upload a pic of mine tonight.. the pumps which i used were also copies bt of different type.. the original one like those were used in some mistubishi as inline fuel pumps(factory fitted)

[shqamar]

looking forward to see the pictures sharo53 , and yes this is not the chinese brand , mine one is korean its a bit different but to me they all are chinese brand .

[Sharo53]

all three i used were of this type

[Sharo53]

i also found the pic of this type of pump giving supply to some bigger engine...
and that must b the original one...
found this pis from PAKWHEELS..

[shqamar]

GOD almighty sharo53 u already used 3 in how many months ? also the one u are posting here is pure chinese brand cost 750 rupees and the one i posted is korean brand cost 1000 rupees though i seriously doubted about korean brand i personally think they all are chinese brand .

[Sharo53]

actually when we get cng installed in the car about 6-7 years ago the first one was installed with that, then for next years(about4.5) i dont even try to convert the car on petrol. then after that i get the engine over hauled then the mechanic told me to drive about 1500km on petrol and that was the first time i used that pump(1st) when i was about to finish 1500km the first pump died. then i used 2nd pump bt when i removed cng from my car(about a year ago) then 2nd pump also died about 7 months ago then used the 3rd pump which i used for about 3weeks after that i removed it as it was giving problem like urs ,jerks and shutting off after few kms, then i ended up with the mannual pump of charade that runs with the engine....
and now im quote satisfied with its performance..

[shqamar]

charade runs with a inline fuel pump or a intank fuel pump ? means does charade fuel pump is inside petrol tank like cultus or does it has a manual inline fuel pump under bonnet ?

[Sharo53]

it comes with a manual pump connected with engine..
some thing like this

t

[shqamar]

thanks sharo53 for sharing your knowledge , u went for right option , i have a 86 charade aswell and its fuel pump never gave me any hassle so i take it charade manual fuel pump is good . how ever i would like to clear that point that when we run our car on cng the fuel pump should stop running how we able to check if fuel pump is not running while car is on cng ?

[Sharo53]

^^if you r asking about the pump of charade... it never stop working bt it have a electric valve in main line which cut-off the supply of petrol to carburator when converted to petrol...
and about the pump of cultus as now you have in line fuel pump you can can hear it clearly or touch it to feel the vibrations...

[shqamar]

so it must be a cut off relay thing that needs to be installed with the inline fuel pump so when car is on petrol the pump starts and when car is on cng the inline pump will switched off i am sure when car is on cng theres no sound of inline fuel pump so there must be a cut off relay install with my fuel pump .

[Sharo53]

yeah there must b some thing like that...

[shqamar]

my friend got me confused actually because according to him the auto electrician install some thing under the dash board might be a cut off relay there and that sets the pump stops working when car is on cng and in my car theres nothing inside the dash board so that makes me confuse really .

[Sharo53]

which type of switch ur cng kit have? on-off like or only one "push button" switch?