fuel Pump noisyness

deadcat · Post by **deadcat** » Wed Jun 16, 2004 3:50 pm

Being as I have yet to get a manual, i can only assume the fuel pump is in the back somwhere?
Anyway, when i turn the key to ignition i hear this whirring noise, which is the fuel pump starting no?
and, when the car is running and i come to a stop i still here somewhat of a whirring noise from the back.
how noisy should it be?

ta.

LogIK · Post by **LogIK** » Wed Jun 16, 2004 4:06 pm

You're right. The whirring sound coming from the rear is your electric fuel pump. Its a little difficult to communicate how loud it should be, in text, but really, it should only be a gentle whirring/humming sound. Mine gets a little louder when i'm running very low on fuel.

Nothing to worry about, matey

deadcat · Post by **deadcat** » Wed Jun 16, 2004 4:45 pm

I thought as much, it's not like real loud, i can just hear it.
bit disturbing after driving a mega quiet golf around.
at least it's no where near as noisy as a mini

anyone had to buy a new one? how much do they cost?
on GSF there is:
18364 FUEL PUMP PO 1.3 55 BHP 8/85 >9/90
or
18364A FUEL PUMP PO 1.3 55 BHP 8/85 >9/90

Being as my CL is a 1991, which do i use? there doesn't seem to be a '91 fuel pump on there..

Karl_CLCoupe · Post by **Karl_CLCoupe** » Wed Jun 16, 2004 4:47 pm

I get the whirr when you first turn the key, before the engine starts. While the engine is running, I can't really determine where all the sounds are coming from, apart from the tappets, and the clicking of the fuel filter, so I couldn't tell you how much noise the fuel pump should make, but it doesn't sound a serious problem.

Regarding the pumps, the bottom one ending A could possibly be for GT. I don't know for sure though. That is unless revisions were made to the fuel pump later in the production run.

Thanks.

Karl.

deadcat · Post by **deadcat** » Wed Jun 16, 2004 4:48 pm

forget what i just said, i spotted this on GSF

18389 FUEL PUMP-IN TANK PO 10/90 >7/94

I take it that is the right one?

Karl: your fuel filter clicks? Oh and your car looks exactly like mine, except mines a '91. I'll get some piccies up soon..

GroovyCarrot · Post by **GroovyCarrot** » Wed Jun 16, 2004 5:15 pm

I might be wrong, but I have a feeling that the mk2 fuel pump was mechanical and then an electric fuel pump was installed on the fuel injected mk3's.. so those first two pumps would be the wrong type entirely if I'm right.

hardhitter · Post by **hardhitter** » Wed Jun 16, 2004 6:11 pm

A mk 3 has two electric fuel pumps.
One lift pump in the tank which you can hear prime when the ignition is switched on. An inline pump is located under the car along with the accumulator and fuel filter.
The lift pump is the same for all but the inline pump is different for the NZ, GT and G40 models.

hobs · Post by **hobs** » Thu Jun 17, 2004 11:52 am

The in-line pump, filter and accumulator are mounted on a bracket behind the driver side rear wheel. If the anti-vibration bolts on the bracket fail (they are just a rubber block glued between two bolts, the glue fails and they fall apart) and the bracket touches the body of the car, the pump noise will be greatly amplified. I dont know how much new A-V bolts cost, mine is lashed up with cable ties, but I suppose it'll need fixed for the MOT.

Have you tried eurocarparts.com for pumps? Their in-tank pumps are around Â£20, in-line nearer Â£100.

deadcat · Post by **deadcat** » Thu Jun 17, 2004 12:18 pm

hobs wrote:The in-line pump, filter and accumulator are mounted on a bracket behind the driver side rear wheel. If the anti-vibration bolts on the bracket fail (they are just a rubber block glued between two bolts, the glue fails and they fall apart) and the bracket touches the body of the car, the pump noise will be greatly amplified....

Cheers for that, I'll check on the AV bolts the weekend.

Tahrey1043 · Post by **Tahrey1043** » Fri Jun 18, 2004 3:31 pm

when i have the seats down but nothing loaded up, you can hear it whirring away quite loudly when you're cruising up the motorway

retro · Post by **retro** » Wed Jun 23, 2004 12:40 am

The Polos I've driven have all had noisy fuel pumps compared to other cars, so don't assume it's faulty just because it's a little loud.

Unless it's really loud or making some irregular noises it's probably normal. I suspect they just sound bad because the Mk3 doesn't have much in the way of soundproofing, especially with an empty boot.

Tahrey1043 · Post by **Tahrey1043** » Wed Jun 23, 2004 3:03 pm

i'd be worried if i didn't hear the front one (injector pressure) going when turning on the ignition, and the rear one doing the constant whirr ("lift"/continual supply circuit) in quiet moments.

even going along, if it failed, it'd be like being on a ferry and the diesels suddenly cut out...... hey..... some constant background noise just stopped... what was it...?!?!

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fuel Pump noisyness

fuel Pump noisyness

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