040 Fuel Pump, Strange Problem

[phat_man]

ok, so a while ago i installed a 040 pump, followed the manual that i found on here, now i mounted it correctly, and took my time getting it the right distance from the bottom of the tank2-3mm.

it would work perfectly fine for the first 5mins of hard driving, even feels healthier, but after abit the engine starts to seize, like badly. not just a misfire, a full seize and jolts the car. it would be fine under ~2300rpm and idle, but it starts to seize badly after that. now i know its not a misfire because i put the stock pump back in for now and it works fine, plugs are gapped to 0.8mm with ngk copper cold 7's. its all good with the stock pump, but somethings funny with the 040. now i had it dynoed with the stock one and its on 13.5afr's so i need the 040 in there, as its making 170rwkw and i understand its time to change the pump, but now i need to know is it getting to much petrol?

does it need a retune or a fuel pressure regulator to stop this seize?

i need other r32gtst owners to clarify whether they needed a fpr after they installed a 040.

btw it's still running off the stock fuel pump wiring.

thanks in advance, issa.

Edited November 5, 2008 by phat_man

[533EYA]

how much fuel is in the car when your giving it some?

[phat_man]

how much fuel is in the car when your giving it some?

ive tried it with a small amount of petrol 15-20L, and like 50L of petrol... it still does it.

thanks alot for the input appreciate it.

[bubba]

No you won't need a fpr..

My guess is it's sucking up crap from the bottom of the tank, I'm not a fan of those integral pickup pumps. I went for an 044 with a sock filter setup and have no dramas.

[phat_man]

No you won't need a fpr..

My guess is it's sucking up crap from the bottom of the tank, I'm not a fan of those integral pickup pumps. I went for an 044 with a sock filter setup and have no dramas.

it works pretty well without a fanging, unless i drive it for along time then it seizes as well, so i dont think it would be from that. also its a large mouth there isnt enough dirt in there to block it . could it be the wiring?

is your computer standard? as afew reckon i need at least a remap.

thanks.

[bubba]

Mine is remapped now but when the 044 originally went in it wasn't remapped and I still had the RB20 in there.

Did you redo the wiring at all? if not then that is the likely culprit.. pretty sure these pumps don't like the lower voltages and when I had my tuner install mine he rewired it for constant 12v (instead of dropping voltage when at idle etc). Could be just a case of old wiring or bad earth, I would be rewiring

[phat_man]

Mine is remapped now but when the 044 originally went in it wasn't remapped and I still had the RB20 in there.

Did you redo the wiring at all? if not then that is the likely culprit.. pretty sure these pumps don't like the lower voltages and when I had my tuner install mine he rewired it for constant 12v (instead of dropping voltage when at idle etc). Could be just a case of old wiring or bad earth, I would be rewiring

yea thats the other thing, its stock wiring still, but it works fine on idle, unless its cutting the amount of voltage its getting up the top as well.... its weird because the pump works fine for a bit, then it turns to shit.

could it be a faulty pump?

[tp1gts2]

yea thats the other thing, its stock wiring still, but it works fine on idle, unless its cutting the amount of voltage its getting up the top as well.... its weird because the pump works fine for a bit, then it turns to shit.

could it be a faulty pump?

sounds like what happend to me, only my 040 was fine for about 6 months, went to a drift praccy day and by the end of the day it wouldnt rev over 2,500, idled nice, just with any load or any revs it wouldnt run, just couldnt get enough fuel to the engine, got it home, it sat in the shed over night, next day i took it for a run and it went fine for a min or two then started to die again

now have another 040 in it and its been fine for a few months with a few drift days, i put it down to a dodgy pump

is your 040 new or used? try another 040 and see if its any different

i have my pump wired up with 12v all the time and stock fpr

Edited November 6, 2008 by tp1gts2

[MBS206]

Redo the wiring.

[NZM.031]

id suggest put your standard pump back in and use it as a lift pump, mount the 040 externally with a surge tank fed by the standard pump.. aslong as you use good hose clamps and mount it all securely you wont have any dramas.. for cops, mount it in a sealed perspex box..

you already have the bosch and standard pumps and you can get a cheap 2nd hand surge tank... much better value than a stooopid subwoofer.

[phat_man]

sounds like what happend to me, only my 040 was fine for about 6 months, went to a drift praccy day and by the end of the day it wouldnt rev over 2,500, idled nice, just with any load or any revs it wouldnt run, just couldnt get enough fuel to the engine, got it home, it sat in the shed over night, next day i took it for a run and it went fine for a min or two then started to die again

now have another 040 in it and its been fine for a few months with a few drift days, i put it down to a dodgy pump

is your 040 new or used? try another 040 and see if its any different

i have my pump wired up with 12v all the time and stock fpr

thanks for that appreciate it. the problem is i dont know anyone else that has a 040.

Redo the wiring.

yea i think thats what imight have to do, except do i leave the stock triggers in there (the ones that turn the pump off when theres enough fuel and stop it from pumping fuel when you crash... etc.. etc... or is it just a straight hard wire?

id suggest put your standard pump back in and use it as a lift pump, mount the 040 externally with a surge tank fed by the standard pump.. aslong as you use good hose clamps and mount it all securely you wont have any dramas.. for cops, mount it in a sealed perspex box..

you already have the bosch and standard pumps and you can get a cheap 2nd hand surge tank... much better value than a stooopid subwoofer.

lol i dont have any subs and dont plan on getting any.

i dont want to have to go external pump, seems abit to much for the amount of power i ultimately aim of having (~230rwkw) so i think the internal should be plenty... only if it worked....

who suggest's a good place in sydney to redo the wiring for my fuel pump on my r32?

btw thanks again for the help guys, appreciate it.

[bubba]

Is it even possible to mount an 040 externally? I wouldn't think so with the integral pickup.. that's what the 044 is designed for but you can run them in tank with the sock filter setup.

[phat_man]

Is it even possible to mount an 040 externally? I wouldn't think so with the integral pickup.. that's what the 044 is designed for but you can run them in tank with the sock filter setup.

the 044 seemed like overkill for what i wanted.

but now the 040 isnt working properly...

so can someone confirm that they needed a rewire to run a 040 in a r32 gtst?

thanks, issa.

[bubba]

You don't NEED to rewire it, but with the old wiring it's probably a good idea. Might want to check what voltage the pump is actually seeing..

[tp1gts2]

you dont NEED to do the wiring, it would be better, but i dont think it will fix the problem your having

[phat_man]

you dont NEED to do the wiring, it would be better, but i dont think it will fix the problem your having

yea thats what i thought.

and no one else seems to of had this problem, except the ones with faulty 040's, so i think that might be the case...

whats the go with warranty, i havnt had it for over 12months yet, should i just take it back to where i bought it and do they have to give me a replacement? keep in mind ive had it for around 3 months, but it hasnt been in the car for more then 2 days, it just took me a while to get around to putting it in.

[bubba]

Ring the place you bought it from.

[NZM.031]

there is no overkill with fuel, it will just return to the tank if its not needed.. i had an 044 on a near stock 33, came in handy when i wanted a bigger turbo, didnt have to worry bout fuel issues. as for noise... well, it wasnt that noisy, but to be honest, i loved the noise.. i didnt have any smell issues either..

why cant you run an 040 externally??

[phat_man]

there is no overkill with fuel, it will just return to the tank if its not needed.. i had an 044 on a near stock 33, came in handy when i wanted a bigger turbo, didnt have to worry bout fuel issues. as for noise... well, it wasnt that noisy, but to be honest, i loved the noise.. i didnt have any smell issues either..

why cant you run an 040 externally??

the way it picks up the petrol is different to the 044, it just has a screen along the whole bottom of the pump that sucks in the petrol, unlike the 044 that has a sock where you can control where it sucks.

so the verdict is faulty pump? i hope im right, im going to take it back tomorrow.

[R31Nismoid]

for wiring - see the FI Quick Red Guide. There is a thread linked from it on how to correctly wire the pump.

Failing that, you could simple test with a fuel pressure gauge. Will tell you if its failing or not while your driving (the gauge sticks out from under the bonnet). 1min to install, 5mins to test.

You don't need a surge tank, certainly not in a street car with your level of mods/power etc.

Check the pressure if thats it, fix it, if not... check the mounting again just to be sure... if all of those aren't it... could be a multitude of things