Author Topic: Low knocking noise - any suggestions?  (Read 2489 times)

Offline Pudding

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Re: Low knocking noise - any suggestions?
« Reply #15 on: January 18, 2018, 09:22:00 AM »
That is definitely a symptom of an unhappy MAF.  You can try a bit of MAF cleaner on it to see if it helps. 

Another thing you can check is the cam sensor.  Mine was covered in metallic dust.  I popped a new one in and the mpg improved drastically, as did the throttle response.  I recently put a magnetic sump plug in to try and reduce that problem.



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Offline Gtcpaul1971

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Re: Low knocking noise - any suggestions?
« Reply #16 on: January 18, 2018, 08:25:01 PM »
pudd- how do I fit a cam sensor? Is it easy? Cleaning the maf is straight forward but I am crap at car diy. How much are cam sensors?
Thought id give the maf cleaner a go before buying a new one. Really funny matey that my car seems to have exactly the annoying little things as yours!  :happy2:
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Offline MIJ_JAGGER

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Re: Low knocking noise - any suggestions?
« Reply #17 on: January 18, 2018, 09:09:34 PM »
pudd- how do I fit a cam sensor? Is it easy? Cleaning the maf is straight forward but I am crap at car diy. How much are cam sensors?
Thought id give the maf cleaner a go before buying a new one. Really funny matey that my car seems to have exactly the annoying little things as yours!  :happy2:
https://www.pelicanparts.com/techarticles/Volkswagen_Golf_GTI_Mk_V/40-ENGINE-Camshaft_Sensor_Replacement/40-ENGINE-Camshaft_Sensor_Replacement.htm

Offline Pudding

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Re: Low knocking noise - any suggestions?
« Reply #18 on: January 19, 2018, 09:30:15 AM »
Yeah that guide covers it, cheers Mij.  Dead easy  :happy2:   Sensor is around £40 with the VAT if I remember, so not expensive for a part that lasts at least 10 years  :happy2:

Other cars with the same problem is good in a way as there is a definite problem.  Isolated issues are a pain in the neck for diagnosis!


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Offline Gtcpaul1971

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Re: Low knocking noise - any suggestions?
« Reply #19 on: January 19, 2018, 07:05:25 PM »
Right, removed MAF, sprayed the metal part only, let it dry and put it back. No difference! Should I have sprayed in the plastic housing it came out of?
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Offline Pudding

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Re: Low knocking noise - any suggestions?
« Reply #20 on: January 20, 2018, 01:09:59 PM »
You spray it into the hole that faces the battery when fitted to the airbox mate  :happy2:

That metal plate is just the backing for the electronics I think.


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Offline Gtcpaul1971

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Re: Low knocking noise - any suggestions?
« Reply #21 on: January 20, 2018, 06:12:18 PM »
Thanks bud  :happy2:
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Offline N44tty

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Re: Low knocking noise - any suggestions?
« Reply #22 on: March 17, 2020, 09:44:40 PM »
Hi guys did anyone get to the bottom of this issue I have the same problem with my s3🤯
New stock clutch kit and dmf but still have the noise

Offline Pudding

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Re: Low knocking noise - any suggestions?
« Reply #23 on: March 21, 2020, 12:17:58 PM »
As per our discussions, ordered one of these to see if it helps.  Well, both sets actually as I'm not sure if my end cap is 79.5mm or 84.5mm!

https://www.darksidedevelopments.co.uk/products/02m-02q-gearbox-input-shaft-shim-kit-and-end-cap.html


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Offline Gtcpaul1971

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Re: Low knocking noise - any suggestions?
« Reply #24 on: March 27, 2020, 07:41:45 AM »
Hi. Mine was the shim. £29 for the part and £50 to fit. All sorted.
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