D2 V8 Fuel Pump

[JayBee75]

Hi guys,

Just starting to get some pricing on a fuel pump as I think mine is on it's way out. There is a intermittent wurring noise (like a faint car horn noise) coming from the rear of the car upon accelleration, and when you take the foot off it stops. Could be wrong but it flags to me that the only thing it could be would be fuel pump.

Is it worth investigating a second hand unit and taking the risk? Or getting a new one?
Have had a look on ebay, but not sure of the guys supplying out of the UK and US. Locally I seem to be looking at $650+.

I am hoping I am right otherwise it could be an expensive unecessary exercise.

Any suggestions would be appreciated.

Cheers

[Grumndriva]

My D2 V8 has made the same noise from time to time for as long as I have had it, but it still keeps pumping fuel. I suspected it might be the ACE, but have never been able to pin it down. Will be interested in what yours turns out to be.

[harry]

ricks here sell a drop in replacement commodore pump.
where are you jb?

[JayBee75]

ricks here sell a drop in replacement commodore pump.
where are you jb?

Hi Harry,

Down in Mexico Eastern Suburbs (Nunawading Area).

Was told that had to go with a Landrover units as it's something to do with the retun line in them?

Is it also worth mentioning that I am running the 4.6L V8 in it not the 4.0L.

Like I said I can only see it being the fuel pump, Grumndriva mentioned ACE but the pump etc is located in th engine bay isn't it? The noise directly relates to the inputs on the accelerator. It may be something I could leave but I am trying to ensure it's reliable and don't want to end up being stuck and putting on a tow truck. Plus it would give my Cruiser/Patrol driving friends more ammunition........

Cheers

[Grumndriva]

Hi JB,

My suspicion, and that is all it was, is that it is the rear ACE actuator, and then only because, firstly, it is intermittent, and secondly, being a "horn" sound, it could be caused by fluid passing through a small orifice, and I couldn't think of what else it could be. My vehicle has made the noise for the past 80,000 km (since I bought it) and I know that the fuel pump works fine since it was tested recently when we did the 4.6 litre upgrade. I find I and my passengers notice it more often when the vehicle is hot and has been driven around town.

Be sure to let us know if the new fuel pump cures it on your vehicle.

Cheers,

Terry

[PhilipA]

D2 fuel pumps need to be higher pressure as they have a non return system that works on 3.5 bars not 2.5.

So a Commodore pump maybe will not pump at a high enough pressure.

Perhaps there are some out there that are suitable. Have a look at the Walbro site.
Regards Philip A

[JayBee75]

D2 fuel pumps need to be higher pressure as they have a non return system that works on 3.5 bars not 2.5.

So a Commodore pump maybe will not pump at a high enough pressure.

Perhaps there are some out there that are suitable. Have a look at the Walbro site.
Regards Philip A


Hi phillip,

Yes my initial thought was getting a aftermarket pump like a walbro, but two seperate LD specialists indicate you need the LD unit, there is no aftermarket one that will suit.

Thanks

[JayBee75]

Hi JB,

My suspicion, and that is all it was, is that it is the rear ACE actuator, and then only because, firstly, it is intermittent, and secondly, being a "horn" sound, it could be caused by fluid passing through a small orifice, and I couldn't think of what else it could be. My vehicle has made the noise for the past 80,000 km (since I bought it) and I know that the fuel pump works fine since it was tested recently when we did the 4.6 litre upgrade. I find I and my passengers notice it more often when the vehicle is hot and has been driven around town.

Be sure to let us know if the new fuel pump cures it on your vehicle.

Cheers,

Terry

Hi Terry,

Very Interesting how you describe it. As indicated my initial assumption based on previous fuel pump experience is that it was exactly that the fuel pump. However it is a very light horn noise that's the only way I can describe it, and is more noticeable in the heat, both from a sound perspective and it's frequency. Hence again why I thought the pump under hot conditions.

Now I'm really confused.....

I think I will take the punt and leave it, if the car fails then I know it's the fuel pump. It'[s interesting you said you had it tested, as when i had the 4.6 upgrade they told me they cannot test the pump, which I found weird.

Does you car still make the noise? And if so is there a fix for the ACE noise?

Cheers
JB.

[mrapocalypse]

Mine makes that noise. Has since i owned it too. My fuel pump is stuffed for diferent reasons - it just makes a new higher pitched fuel pump noise and runs out of fuel with the guage syaing 2/3 of a tank left.

I paid $650 for the new one but haven't fitted it yet.

[PhilipA]

Have a look at This.

Are the US/Euro E36 fuel pumps different? - Bimmerforums - The Ultimate BMW Forum (http://forums.bimmerforums.com/forum/showthread.php't=836634)

The walbro GSS340 or 341 or 342 would fit the bill as far as performance, but You would have to fit it into the assembly. This is not usually too difficult as most fuel pumps are a similar size.

However I have never seen the setup in a D2 with the regulator in the tank.
Specialists do not know everything.

You have to be interested enough in saving the money, and pretty dextrous to fiddle around.

Can somone post a picture of the D2 setup? Is it just a pump with a regulator on top?
Regards Philip A

[justinc]

Have a look at This.

Are the US/Euro E36 fuel pumps different? - Bimmerforums - The Ultimate BMW Forum (http://forums.bimmerforums.com/forum/showthread.php't=836634)

The walbro GSS340 or 341 or 342 would fit the bill as far as performance, but You would have to fit it into the assembly. This is not usually too difficult as most fuel pumps are a similar size.

However I have never seen the setup in a D2 with the regulator in the tank.
Specialists do not know everything.

You have to be interested enough in saving the money, and pretty dextrous to fiddle around.

Can somone post a picture of the D2 setup? Is it just a pump with a regulator on top?
Regards Philip A

Hi Phillip, The biggest obstacle with these is that you have to cut the nylon housing apart to get at the pump and filter etc. WHAT WERE THEY THINKING!!:mad::mad::mad:

JC

[Grumndriva]

Hi JB,

The car still makes the noise from time to time, but does not seem to be an issue (except for passengers who wonder who is honking). I am happy to live with it. If it is the ACE, it is not affecting its performance, and I would rather leave that system sealed, and if it is the fuel pump, it again is not affecting its performance as far as I can tell. So I am going to leave well enough alone.

Cheers,

Terry

[landyprincess]

Hi, unfortunately not a very useful post other than to mention that I too have had that faint, and I mean very faint sound intermittently from the rear.

I'm not overly concerned about it at the moment as I have other things to sort out. Would be interested to know how you go though... maybe this might be an intersting poll just to see how many of us out there have heard this 'sound'.. i'm in a D2 S2..

cheers

Lp

[Wotto]

Hello all, I believe the noise is the fuel filler cap venting pressure

[driftwagon]

Hello all, I believe the noise is the fuel filler cap venting pressure

i have the same noise in my 2000 v8 when i get below 3/4 of a tank it gets lowder the lower it gets. its not the fuel pump noise cause i can hear that to. put it down to pressure in the tank and not venting properly (sucking in are from outside. remove\loosen cap dose it go away. i don't have ACE