Back pressure when refueling

waz · 18-02-2005, 03:30 PM

Hi all

I just wanted to know if any if you experience the same problem I get when refueling.

At selected petrol pumps I pull the trigger as normal, fill up about 2 litres, then the whole bowser pump shudders. I then start again and the pipe will shudder again after a few more litres. This can happen upto 4/5 times during the one refuelling. At first I thought it was just the bowser, but its happened on at least 4 different pumps, then i thought it was just the way I was pulling the trigger, but I get no problems when I fill my falcon at those same pumps.

Then just last week I noticed another BA astina hatchback where the chick had the same problem I had. However she was only getting in a few 100ml before each shudder.

Any ideas on why this is happening???

Im thinking its to do with the shape of the metal pipe, ie the bend in it.

Ive tried holding the bowser rubber pipe in in different directions, but its still a mystery to me..

Nate · 18-02-2005, 05:41 PM

i dunno ... my petrol tank sounds like a BOV when i take the cap off ... but thats it :P

Cosmo Dude · 18-02-2005, 07:15 PM

I had to take the nozzle out about 10mm on the hardtop. On the 929 it's about 10 degrees from straight.

Play with it. You'll get it right

Dogo · 19-02-2005, 12:10 AM

yeh i get it. on 2 BA astinas now. just not pulling the trigger the whole way works for me.

boostedbatman · 19-02-2005, 05:29 AM

Its not your car its the fuel vs the size/shape of the collector. As Cosmo said try pulling it out about 10mm and then push the handle down to give an angle where the exess air can escape and you should be fine. If you cause any type of vaccuum shut off when refuelling the pressure will act the same way the fuel does when tank is full and tell the gun that youve reached your fill point

Dogo · 19-02-2005, 10:34 AM

ahhhh

i thought it might be that the pipe from cap -> tank is angled awkwardly.

waz · 19-02-2005, 11:13 AM

thanks for your responses guys

it looks like all of you have used the tricks i have..

from now on, ill do a 4/5 trigger pull, slightly out with a bit of an angle for the nozzle...hopefully now the air will come out smoothly.

its weird how nearly everyone with a BA has the same problem.

boostedbatman · 19-02-2005, 11:32 PM

Its a team effort

platypus · 20-02-2005, 11:43 AM

common to mazda i'm thinking... my BJ has it... as ya said pull it out a notch and lean down on the gun... pull the trigger all the way... some are more sketchy than others, so doing this means 4/5 trigger is only necessary some of the time

CityEnd · 20-02-2005, 03:45 PM

yeh i had that problem at the start too... how i over came it was stick the nozzle all the way in... til the handle down a bit so the tip of the nozzle is slightly raised, and then pull the trigger all the way and there shouldn't be a problem.

Laser the Amazer · 20-02-2005, 09:59 PM

yeah I get it with the BG the 2 KJ's and the BJ

must be a Mazda thing

I usually turn the nozzle a few degrees or pull it back out a bit

its because the air is having trouble escaping

Rob

Red Frog · 20-02-2005, 11:43 PM

yeah i get it too - all the time! - in my kn laser (aka astina). it clicks off within seconds of me refueling and i'm like "my tank is empty u nong!". so yeah, i agree with the guys above. u have to pull the nozzle out slightly ie. don't push it all the way in. but when the tank is PROPERLY full it will then click off, so don't worry about it overspilling.

andrewgrazier · 21-02-2005, 03:49 PM

i guess the pipe to the tank isnt heaps big

my cars tank must get pressurised or somthing
BG astina, n when ya go to take the fuel cap off it goes PHSST.

and since my belts got replaced the car sounds bit like a turbo car with out any blow off valve, duno if thats a good thing or not

Laser the Amazer · 21-02-2005, 07:22 PM

Quote:

Originally Posted by andrewgrazier

i guess the pipe to the tank isnt heaps big

my cars tank must get pressurised or somthing
BG astina, n when ya go to take the fuel cap off it goes PHSST.

and since my belts got replaced the car sounds bit like a turbo car with out any blow off valve, duno if thats a good thing or not

yeah thats normal about the fuel tank

sounds like the tension on your timing belt is too tight.

Rob

mrpayner · 22-02-2005, 07:39 AM

I remember having the same problem when i first bought my car.. travelling back from paramatta road down the hume i filled up at the mobil place.. far out.. i couldn't figure out was was wrong, obviously i fine tuned it.. i think i only put a couple of inches into the opening these days, even then sometimes it still doesn't work..

AP

andrewgrazier · 22-02-2005, 09:37 AM

its died down a little nows, probably stretched the belt a little. i know my powersteering belt isnt as tight as what it could be because when im in a parking lot n turn hard to each side it makes a noise
fine while driving thoguh

18-02-2005, 03:30 PM	#1
waz Junior Member Join Date: Mar 2004 Posts: 8	Back pressure when refueling Hi all I just wanted to know if any if you experience the same problem I get when refueling. At selected petrol pumps I pull the trigger as normal, fill up about 2 litres, then the whole bowser pump shudders. I then start again and the pipe will shudder again after a few more litres. This can happen upto 4/5 times during the one refuelling. At first I thought it was just the bowser, but its happened on at least 4 different pumps, then i thought it was just the way I was pulling the trigger, but I get no problems when I fill my falcon at those same pumps. Then just last week I noticed another BA astina hatchback where the chick had the same problem I had. However she was only getting in a few 100ml before each shudder. Any ideas on why this is happening??? Im thinking its to do with the shape of the metal pipe, ie the bend in it. Ive tried holding the bowser rubber pipe in in different directions, but its still a mystery to me..

18-02-2005, 05:41 PM	#2
Nate Pandaspeed Racing Join Date: Oct 2003 Location: Brisney Land Car: BG SP Posts: 4,170 View Photos By: Nate	i dunno ... my petrol tank sounds like a BOV when i take the cap off ... but thats it :P __________________ Life would be straight without twisties STOCK AS A ROCKET! •motor sport is dangerous and that accidents causing harm can and do happen and may happen to me. I accept the conditions of, and acknowledge the risks arising from, attending or participating in the event and being provided with the event services by CAMS and the Associated Entities I THINK I AM N2!

18-02-2005, 07:15 PM	#3
Cosmo Dude コスモ Join Date: Dec 2002 Location: Location: Vic Car: Mazda '95 Astina I4, '86 B2K and '10 3 MZR-CD Posts: 7,888 View Photos By: Cosmo Dude	I had to take the nozzle out about 10mm on the hardtop. On the 929 it's about 10 degrees from straight. Play with it. You'll get it right __________________ My 'stina Hatch

19-02-2005, 05:29 AM	#5
boostedbatman Manpink Crusader Join Date: Jun 2004 Location: Stafford, Brisbane Car: 1990 GD mx6 F2T, and soon I might drive the batmoobile once again Posts: 2,280 View Photos By: boostedbatman	Its not your car its the fuel vs the size/shape of the collector. As Cosmo said try pulling it out about 10mm and then push the handle down to give an angle where the exess air can escape and you should be fine. If you cause any type of vaccuum shut off when refuelling the pressure will act the same way the fuel does when tank is full and tell the gun that youve reached your fill point __________________ The Batmobile as she used to be and now she hangs from a chain in the garage

19-02-2005, 11:32 PM	#8
boostedbatman Manpink Crusader Join Date: Jun 2004 Location: Stafford, Brisbane Car: 1990 GD mx6 F2T, and soon I might drive the batmoobile once again Posts: 2,280 View Photos By: boostedbatman	Its a team effort __________________ The Batmobile as she used to be and now she hangs from a chain in the garage

19-02-2005, 12:10 AM	#4
Dogo Senior Member Join Date: Mar 2002 Location: Melb, Aus Car: Mazda 323 BA BPT transplant Posts: 3,459 View Photos By: Dogo	yeh i get it. on 2 BA astinas now. just not pulling the trigger the whole way works for me.

19-02-2005, 10:34 AM	#6
Dogo Senior Member Join Date: Mar 2002 Location: Melb, Aus Car: Mazda 323 BA BPT transplant Posts: 3,459 View Photos By: Dogo	ahhhh i thought it might be that the pipe from cap -> tank is angled awkwardly.

19-02-2005, 11:13 AM	#7
waz Junior Member Join Date: Mar 2004 Posts: 8	thanks for your responses guys it looks like all of you have used the tricks i have.. from now on, ill do a 4/5 trigger pull, slightly out with a bit of an angle for the nozzle...hopefully now the air will come out smoothly. its weird how nearly everyone with a BA has the same problem.

20-02-2005, 11:43 AM	#9
platypus living in the past man Join Date: Dec 2003 Location: Newcastle, NSW Car: Subaru Outback 2.0 turbo Posts: 4,707	common to mazda i'm thinking... my BJ has it... as ya said pull it out a notch and lean down on the gun... pull the trigger all the way... some are more sketchy than others, so doing this means 4/5 trigger is only necessary some of the time __________________ 1997 BG5 Subaru Outback - Now with STI boost...

20-02-2005, 03:45 PM	#10
CityEnd Senior Member Join Date: Jul 2002 Location: Melbourne Car: . Posts: 915	yeh i had that problem at the start too... how i over came it was stick the nozzle all the way in... til the handle down a bit so the tip of the nozzle is slightly raised, and then pull the trigger all the way and there shouldn't be a problem.

20-02-2005, 09:59 PM	#11
Laser the Amazer Senior Member Join Date: Dec 2002 Location: Wollongong Posts: 559	yeah I get it with the BG the 2 KJ's and the BJ must be a Mazda thing I usually turn the nozzle a few degrees or pull it back out a bit its because the air is having trouble escaping Rob __________________ what do u write here again???

20-02-2005, 11:43 PM	#12
Red Frog Senior Member Join Date: May 2004 Location: Shepherds Bush, London BABY Car: My feet :p Posts: 1,292	yeah i get it too - all the time! - in my kn laser (aka astina). it clicks off within seconds of me refueling and i'm like "my tank is empty u nong!". so yeah, i agree with the guys above. u have to pull the nozzle out slightly ie. don't push it all the way in. but when the tank is PROPERLY full it will then click off, so don't worry about it overspilling. __________________ I don't need drugs. I'm just high on twisties

21-02-2005, 03:49 PM	#13
andrewgrazier Senior Member Join Date: Feb 2003 Location: newcastle Posts: 586 View Photos By: andrewgrazier	i guess the pipe to the tank isnt heaps big my cars tank must get pressurised or somthing BG astina, n when ya go to take the fuel cap off it goes PHSST. and since my belts got replaced the car sounds bit like a turbo car with out any blow off valve, duno if thats a good thing or not

22-02-2005, 07:39 AM	#15
mrpayner Senior Member Join Date: Mar 2002 Location: -37.561609, 143.854814 Car: 2013 Mazda 6 GT Sedan - Soul Red Posts: 3,517 View Photos By: mrpayner	I remember having the same problem when i first bought my car.. travelling back from paramatta road down the hume i filled up at the mobil place.. far out.. i couldn't figure out was was wrong, obviously i fine tuned it.. i think i only put a couple of inches into the opening these days, even then sometimes it still doesn't work.. AP __________________ 2013 Mazda6 Diesel GT ------------------------------------------------------------------------------------------------------------------------------[Formerly] 2004 Mazda6 Luxury Sport

22-02-2005, 09:37 AM	#16
andrewgrazier Senior Member Join Date: Feb 2003 Location: newcastle Posts: 586 View Photos By: andrewgrazier	its died down a little nows, probably stretched the belt a little. i know my powersteering belt isnt as tight as what it could be because when im in a parking lot n turn hard to each side it makes a noise fine while driving thoguh

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