Sound of failing fuel pump?
#1
Sound of failing fuel pump?
Listening to the sound of the fuel pump with engine idling, I think I hear some whining. It is unmistakably detectable with the trunk open. Not sure if it is normal or excessive. So, I recorded the sound with my iPhone:
https://instaud.io/3UVv
Is it too whiny to be normal? Is my fuel pump on the way out?
https://instaud.io/3UVv
Is it too whiny to be normal? Is my fuel pump on the way out?
#2
#3
I think that “cracking sound” is what I referred to as whining of the fuel pump. But now that you said it, you might be exactly right — it is more of a cracking sound, rather than whining sound.
it was recorded by placing iPhone pretty close to the fuel pump, to avoid contamination from other nearby sounds. Maybe from 3 to 5 inches away.
By your reaction I assume the cracking sound should not be there if the pump was operating properly?
it was recorded by placing iPhone pretty close to the fuel pump, to avoid contamination from other nearby sounds. Maybe from 3 to 5 inches away.
By your reaction I assume the cracking sound should not be there if the pump was operating properly?
#5
Hi v1rok
Maybe your iPhone was able to pick up sounds that the human ear could not properly hear even if you were standing very near
So I'm tempted to say that overall, it all sounds very normal and so maybe that 'Crackling Sound' is just Petrol flowing through the System
The time to start getting Paranoid!
Is when you hear that Constant 'Whining' Sound start to miss a beat, as that can be an indication that the Pump is then on the way out
No need to Spend $100+ on a New one, as these Pumps are generic and fitted to lots of Cars, so you could do what I did and get one off ebay for around £30 (plus a New Filter obvs!)
There's a lot of 'Badged' Stuff around these days, so there's no telling where its been made
Maybe your iPhone was able to pick up sounds that the human ear could not properly hear even if you were standing very near
So I'm tempted to say that overall, it all sounds very normal and so maybe that 'Crackling Sound' is just Petrol flowing through the System
The time to start getting Paranoid!
Is when you hear that Constant 'Whining' Sound start to miss a beat, as that can be an indication that the Pump is then on the way out
No need to Spend $100+ on a New one, as these Pumps are generic and fitted to lots of Cars, so you could do what I did and get one off ebay for around £30 (plus a New Filter obvs!)
There's a lot of 'Badged' Stuff around these days, so there's no telling where its been made
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v1rok (07-08-2019)
#6
i have a box of Techron injector cleaner. Was actually planning on adding a bottle once I hit low on gas.
Is Techron very different from Lucas injector lubricant?
#7
Hi v1rok
Maybe your iPhone was able to pick up sounds that the human ear could not properly hear even if you were standing very near
So I'm tempted to say that overall, it all sounds very normal and so maybe that 'Crackling Sound' is just Petrol flowing through the System
The time to start getting Paranoid!
Is when you hear that Constant 'Whining' Sound start to miss a beat, as that can be an indication that the Pump is then on the way out
No need to Spend $100+ on a New one, as these Pumps are generic and fitted to lots of Cars, so you could do what I did and get one off ebay for around £30 (plus a New Filter obvs!)
There's a lot of 'Badged' Stuff around these days, so there's no telling where its been made
Maybe your iPhone was able to pick up sounds that the human ear could not properly hear even if you were standing very near
So I'm tempted to say that overall, it all sounds very normal and so maybe that 'Crackling Sound' is just Petrol flowing through the System
The time to start getting Paranoid!
Is when you hear that Constant 'Whining' Sound start to miss a beat, as that can be an indication that the Pump is then on the way out
No need to Spend $100+ on a New one, as these Pumps are generic and fitted to lots of Cars, so you could do what I did and get one off ebay for around £30 (plus a New Filter obvs!)
There's a lot of 'Badged' Stuff around these days, so there's no telling where its been made
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#8
Normal-ish.
I would ask:
How old the fuel filter?
How long since the plastic mesh filter INSIDE the small sump tank was cleaned?
Does this sound get more pronounced with heat, and I know its HOT in Nevada at the moment. Mine would whine more so when summer 45C heat hit, but much quieter when colder.
Fuel additives are much alike, and worth a try.
I would ask:
How old the fuel filter?
How long since the plastic mesh filter INSIDE the small sump tank was cleaned?
Does this sound get more pronounced with heat, and I know its HOT in Nevada at the moment. Mine would whine more so when summer 45C heat hit, but much quieter when colder.
Fuel additives are much alike, and worth a try.
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v1rok (07-08-2019)
#9
Normal-ish.
How old the fuel filter?
How long since the plastic mesh filter INSIDE the small sump tank was cleaned?
Does this sound get more pronounced with heat, and I know its HOT in Nevada at the moment. Mine would whine more so when summer 45C heat hit, but much quieter when colder.
How old the fuel filter?
How long since the plastic mesh filter INSIDE the small sump tank was cleaned?
Does this sound get more pronounced with heat, and I know its HOT in Nevada at the moment. Mine would whine more so when summer 45C heat hit, but much quieter when colder.
Plastic mesh filter in sump tank. I have it on my "to-do" list. Will ty to get to it soon
Regarding whether the fuel pump cracking noise gets louder when outside temperature rises. This thought crossed my mind, too. But I don't have enough data points yet to make a determination. For some reason, I don't recall noticing the cracking noise from the pump previously. But it does not mean it was not there. Could be that I just did not notice it before.
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orangeblossom (07-11-2019)
#10
Oh dear.
Unknown service items should NOT be on a "to do list" after 2.5 years. They should have been done and ticked off within 6 weeks of ownership.
Fuel filter, every 5 years or so, I do mine at 5 years, regardless of kms traveled.
Plastic filter inside that sump tank, DO IT NOW, it will most likely be clogged, and starving the pump for supply fuel.
No idea on data points, sounds complicated to me.
I drive mine, and LISTEN, when its HOT outside, the pump is barely audible, when its COLD outside, I dont hear it. That pump is 8 years old and a Bosh, Made in Germany pump.
My X300 had a whining pump, and at 160090kms, it died, bugga. Out with the tank, new Nippon Denso pump, modified bracket, clamp on supply hose, and all good, and that is audible sometimes when its HOT out. The R, is silent.
Average life of electric fuel pumps is 160000kms on a daily used car, those that sit for months on end would shorten that time I would think, as stale fuel is not good for anything.
It is a service item in my opinion, especially when first aquiring one of these neglected classics.
Unknown service items should NOT be on a "to do list" after 2.5 years. They should have been done and ticked off within 6 weeks of ownership.
Fuel filter, every 5 years or so, I do mine at 5 years, regardless of kms traveled.
Plastic filter inside that sump tank, DO IT NOW, it will most likely be clogged, and starving the pump for supply fuel.
No idea on data points, sounds complicated to me.
I drive mine, and LISTEN, when its HOT outside, the pump is barely audible, when its COLD outside, I dont hear it. That pump is 8 years old and a Bosh, Made in Germany pump.
My X300 had a whining pump, and at 160090kms, it died, bugga. Out with the tank, new Nippon Denso pump, modified bracket, clamp on supply hose, and all good, and that is audible sometimes when its HOT out. The R, is silent.
Average life of electric fuel pumps is 160000kms on a daily used car, those that sit for months on end would shorten that time I would think, as stale fuel is not good for anything.
It is a service item in my opinion, especially when first aquiring one of these neglected classics.
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#11
The following 2 users liked this post by Some Day, Some Day:
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orangeblossom (07-22-2019)
#12
Sons S3 XJ6, new pumps as part of the post purchase service, He used the LH tank mainly, but switched over from time to time, mainly when I pestered him to do so. That RH pump lasted less than 4 years. the LH still OK today, 9 years, and would be 85000kms old. We have pure fuel here, no Ethanol that is easily sourced, so maybe that is our saviour,
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orangeblossom (07-11-2019)
#13
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Grant Francis (07-11-2019)
#14
After some research (which probably took longer than it needed to be), I ordered Bosch 69414 fuel pump. AutoZone had it for $179, but Amazon had it for $90 (new), so half price. There were couple of slightly cheaper options, but I thought that Bosch should be good enough brand to pay a little more for extra insurance. And, the kicker that swayed me in the end is that the picture of the pump looks EXACTLY the same as the one I took out of my XJS (with Lucas name on it — suspect it is original pump), including the exact shade of brown top color. Will update once all pieces are arrived and installed...
#15
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