Jump to content
SAU Community

Recommended Posts

Hey guys

I have a Bosch 040 fuel pump in my R33 which i have had int he car for around 5 months or so. Last weekend on the way home, it suddenly starting making a really loud whining noise. To me it sounded like vibrations, as the pitch changed as the revs of the car changed. At idle it is really loud, where as as you reach higher revs it got less audible. When the car is off, and you turn the key to prime the fuel pump, the sound is very very loud. Louder than when driving, u can hear it clearly from outside the car.

The last couple days it's being on and off, usually when the car is cold it's fine, after a while it begins.

Anyone have any ideas on what i could be. Are these the symptoms of a dying fuel pump, although is shouldnt be after this time.

It's just annoying as i'm trying to sell my car, and it's pretty embarrising and hard to explain when they are driving the car and suddenly this massive whining can be heard..lol

Any help much appreciated

Simon

Link to comment
https://www.sau.com.au/forums/topic/80592-fuel-pump-problemsplease-read/
Share on other sites

Most Bosch pumps get noisy when they get hot or a run low on fuel, was it on a full tank or was the level quite low?

Yeah it was on a medium tank, then i filled up and it still did it. The only thing is that it hasnt done it for half a year, and the noise is quite loud.

I';ll take it apart on the weekend and see if i can notice anything. The pump is mounted to the cradle with just a normal clamp, it may have come loose. Pretty sure the cradle is mounted correctly so i doubt that would have come loose. I'll check it out anyway

Thanks guys

So this is not what a fuel pump sounds like when it's on it's last legs???

The pickup strainer "sock" may be clogged, if it's trying to pull fuel through a clogged sock it will be very noisy and the output flow could be dangerously reduced. A clooged filter in the pressure sise 9normal fuel filter) will make the pump work very hard, and could make it noisy.

However, rotary pumps do NOT like running dry, if it's been run very, very low or out of fuel that will certainly knacker it.

The pump doesnt use a sock, it just has the mesh filter at the base of the pump. Well i had a look, pulled it out. Everything seemed fine, put the pump back in, made sure the cradle was in the holder. For the first day is was fine, but last night is started making the noise again. Doesnt for the first 5-10 mintures of driving, but after that is very loud.

So u think a clogged fuel filter may be causing this?

Well i changed the fuel filter and it still makes the really loud vibration noises.

Now one thing i noticed was that each of the 3 times i have taken the fuel pump out since it started making this noise, the mesh on the bottom of the 040 had some shit on it, like lint. I just wiped it off, put the pump back in, and each time it's fine for either the first few hours to a day, but after it starts again.

Anyone have an idea, starting to think the fuel pump is farked

Well i changed the fuel filter and it still makes the really loud vibration noises.

Now one thing i noticed was that each of the 3 times i have taken the fuel pump out since it started making this noise, the mesh on the bottom of the 040 had some shit on it, like lint. I just wiped it off, put the pump back in, and each time it's fine for either the first few hours to a day, but after it starts again.

Anyone have an idea, starting to think the fuel pump is farked

This might sound strange but in my 180 it was really loud when it was hot or if I had the aircon on for some reason?

Nah i dont see how a dyno will fix/find this problem, as the car runs fine it's just the noise i'm worried about

Put it on the dyno to check your Air-Fuel Ratios to make sure there isn't a problem with the pump.

I don't think the noise is your major concern,. Whether or not the pump is doing it's job properly is much more important.

Ok the fuel pump is shagged. Replaced it with a walbro for the time being and the noise is gone and the car runs heaps better surprisingly.

So this pump lasted 5 months farkin! It was bought of a certain someone who used to sell "genuine" bosch pumps, but after actually lookin at the pump in detail it's doesnt look like a genuine bosch pump.

Not surprisingly this certain person is not selling "genuine" ones anymore, but copy's.

  • 2 years later...

I'm just curious, I've had this problem occur with my old 040 and was wondering if it might have been caused by something else? I've replaced the pump, but I just wanted to make sure it won't happen again and wreck another pump.

Has anyone had a similar experience or know enough about the RB25DET's fuel system to know what part failure might cause the pump to make this noise?

  • 2 months later...

Hey has there been a resolve to this issue????

I myself have gone thru a walbro, 2x GTR pumps (secondhand), 1x 040 (new) and then put a new 044 in and it seems to be doing the same

the GTR pumps when they went, just became noisey and wouldn't create pressure above 60ps

The 040 when it went, became noisey then at load would completely die but at idle would still create pressure

Now the 044 has become noisey and will not create pressure above 90ps

I have done the wiring mod and then even tried with new relay and wiring problem still occured, now i have just had a friend with an external setup have the same problem, which was going to be my next thing to try (surge tank setup)

i have pumped all fuel out of tank but i have not removed tank and had flushed and cleaned

just hoping someone here has actually done something that has completely resolved the issue, after all there seems to be many on the site that have this issue??

Edited by green 33

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • The rain is the best time to push to the edge of the grip limit. Water lubrication reduces the consumption of rubber without reducing the fun. I take pleasure in driving around the outside of numpties in Audis, WRXs, BRZs, etc, because they get all worried in the wet. They warm up faster than the engine oil does.
    • When they're dead cold, and in the wet, they're not very fun. RE003 are alright, they do harden very quickly and turn into literally $50 Pace tyres.
    • Yeah, I thought that Reedy's video was quite good because he compared old and new (as in, well used and quite new) AD09s, with what is generally considered to be the fast Yokohama in this category (ie, sporty road/track tyres) and a tyre that people might be able to use to extend the comparo out into the space of more expensive European tyres, being the Cup 2. No-one would ever agree that the Cup 2 is a poor tyre - many would suggest that it is close to the very top of the category. And, for them all to come out so close to each other, and for the cheaper tyre in the test to do so well against the others, in some cases being even faster, shows that (good, non-linglong) tyres are reaching a plateau in terms of how good they can get, and they're all sitting on that same plateau. Anyway, on the AD08R, AD09, RS4 that I've had on the car in recent years, I've never had a problem in the cold and wet. SA gets down to 0-10°C in winter. Not so often, but it was only 4°C when I got in the car this morning. Once the tyres are warm (ie, after about 2km), you can start to lay into them. I've never aquaplaned or suffered serious off-corner understeer or anything like that in the wet, that I would not have expected to happen with a more normal tyre. I had some RE003s, and they were shit in the dry, shit in the wet, shit everywhere. I would rate the RS4 and AD0x as being more trustworthy in the wet, once the rubber is warm. Bridgestone should be ashamed of the RE003.
    • This is why I gave the disclaimer about how I drive in the wet which I feel is pretty important. I have heard people think RS4's are horrible in the rain, but I have this feeling they must be driving (or attempting to drive) anywhere close to the grip limit. I legitimately drive at the speed limit/below speed the limit 100% of the time in the rain. More than happy to just commute along at 50kmh behind a train of cars in 5th gear etc. I do agree with you with regards to the temp and the 'quality' of the tyre Dose. Most UHP tyres aren't even up to temperature on the road anyway, even when going mad initial D canyon carving. It would be interesting to see a not-up-to-temp UHP tyre compared against a mere... normal...HP tyre at these temperatures. I don't think you're (or me in this case) is actually picking up grip with an RS4/AD09 on the road relative to something like a RE003 because the RS4/AD09 is not up to temp and the RE003 is closer to it's optimal operating window.
    • Either the bearing has been installed backwards OR the gearbox input shaft bearing is loosey goosey.   When in doubt, just put in a Samsonas in.
×
×
  • Create New...