Swift Vdi- Knocking Sound

arun.sidhes · 24th August 2009, 23:10

I have completed 32,000 km then i given for service ABT, chennai they changed into air filter , oil changes and engine tunning also. Before service i don't have the any probelm, after service once i have reached into more than 80 km speed i am getting sound from the engine cabin. I have asked the service center peopl's thay are telling normal sound only... after that they tunned my engine once again...still i am getting the knocking sound like dah.. dah.. once i have reached into more than 80km speed...

Guys can you please respond my query ... how resolve stop the sound .. please give me valuable suggetion to me....i am waiting for team-bhp peoples suggestion....

Jaggu · 24th August 2009, 23:20

Can you explain the sound more, you are sure its not diesel engine pitter patter sound? Does it happen when accelerating or holding the accelerator at a particular RPM? Does it happen in all gears?

arun.sidhes · 25th August 2009, 00:23

Its happening when i am accelerating only, not holding the accelerator. I am not sure about the all gears, the slow speed (30-60) sound is less and (80km-120 km) the sounds is more. I have checked the mechanic, he told the sound is called by KNOCKING. I am sure diesel engine pitter patter sound only.

Jaggu · 25th August 2009, 11:55

Well one things you can try is, ask the mechs to check if there is any air caught in the fuel line or filter. Bleeding the lines will help to check this, then see if the sound subsides.

Any idea what was the tuning that they did? DDIS engine doesnt have anything much which can be tuned, hence asking.

athalaga · 25th August 2009, 12:01

Can you tell at which gear this is happening. AFAIK the ddis does should not knock at those speeds.

Psycho · 25th August 2009, 12:22

Would recommend that you get the fuel pump checked.

arun.sidhes · 25th August 2009, 17:20

Ok i can try it if any air is caught in fuel or filter. i don't know what they have done in tunning and today moring also i have tried it , the sound is happening in 4th and 5th gear only. any idea about it?

I have tried in shell diesel as well as HP turbo also, same sound is coming from engine cabin

Jaggu · 25th August 2009, 17:42

arun: What Psycho meant was to check the fuel pump feeding the diesel in the car, also try using normal IOC diesel and see if there is a difference.

If its only in 4th and 5th gear, i would suggest showing the car at another reliable A.S.S and ask them to rule out any gearbox issues, just in case.

SirAlec · 25th August 2009, 22:26

i wonder what did they tune. Did they fiddle with the ECU?

Did they touched the nozzles.?

Just to be sure does the sound goes if you down shift.

mclaren1885 · 25th August 2009, 22:32

In the Swift D, often the tappet noise can be assumed to be knocking. I hear this has been an issue with many customers complaining about the hydraulic tappets.

arun.sidhes · 25th August 2009, 23:24

I don't know what they are tunned my engine...They didn't touched in nozzles.....can u suggest me for good mechanic in chennai for DDIs engine? I am not satisfied with ABT...Please help me

Mod Note: Kindly avoid using dotty style of posting.

shibujp · 25th August 2009, 23:26

Arun,

Is the knocking sound a metallic pinging noise? The normal diesel pitter patter will be more of a grating, gravelly noise.

If using premium fuel it is better to stick to either premium only or normal diesel only. Mixing the two can cause the injectors to clog up. Seems like the additives in the premium fuel can loosen the residue left in the tank by normal fuel and clog up your injectors.

Drive on,
Shibu.

Piyush_Vroom · 25th August 2009, 23:35

Get the injector nozzles checked and ECU Tuning pertaining to those. They can be the only reason

arun.sidhes · 26th August 2009, 00:24

I have asked with mechanic, he told me its konocking sound.Before that i have mixed with premium and non premium also. now i am only using the HP turbo, but the sound is there.
This week end i am going to check with injector nozzles checked and ECU Tuning pertaining
Any good service center in chennai? Please suggest me

srini.rtmc · 26th August 2009, 14:58

Does it happen when accelerating or holding the accelerator at a particular RPM? What does this mean?
I have had similar issues at 1600-1800 RPM, observed mostly in 3rd gear. It happens when we maintain the same rpm. The clatter significantly changes and increase in noise is seen. Else it is not observed.

24th August 2009, 23:10	#1
arun.sidhes BHPian Join Date: Oct 2007 Location: Chennai Posts: 64 Thanked: 0 Times	Swift Vdi- Knocking Sound I have completed 32,000 km then i given for service ABT, chennai they changed into air filter , oil changes and engine tunning also. Before service i don't have the any probelm, after service once i have reached into more than 80 km speed i am getting sound from the engine cabin. I have asked the service center peopl's thay are telling normal sound only... after that they tunned my engine once again...still i am getting the knocking sound like dah.. dah.. once i have reached into more than 80km speed... Guys can you please respond my query ... how resolve stop the sound .. please give me valuable suggetion to me....i am waiting for team-bhp peoples suggestion....
	() Thanks

24th August 2009, 23:20	#2
Jaggu Team-BHP Support Join Date: May 2004 Location: Bangalore Posts: 20,379 Thanked: 17,320 Times	Can you explain the sound more, you are sure its not diesel engine pitter patter sound? Does it happen when accelerating or holding the accelerator at a particular RPM? Does it happen in all gears?
	() Thanks

25th August 2009, 00:23	#3
arun.sidhes BHPian Join Date: Oct 2007 Location: Chennai Posts: 64 Thanked: 0 Times	Its happening when i am accelerating only, not holding the accelerator. I am not sure about the all gears, the slow speed (30-60) sound is less and (80km-120 km) the sounds is more. I have checked the mechanic, he told the sound is called by KNOCKING. I am sure diesel engine pitter patter sound only. Last edited by Jaggu : 25th August 2009 at 11:52. Reason: Please avoid typing... like... this.. with dots. Thanks.
	() Thanks

25th August 2009, 11:55	#4
Jaggu Team-BHP Support Join Date: May 2004 Location: Bangalore Posts: 20,379 Thanked: 17,320 Times	Well one things you can try is, ask the mechs to check if there is any air caught in the fuel line or filter. Bleeding the lines will help to check this, then see if the sound subsides. Any idea what was the tuning that they did? DDIS engine doesnt have anything much which can be tuned, hence asking.
	() Thanks

25th August 2009, 12:01	#5
athalaga BHPian Join Date: Jul 2009 Location: Bangalore Posts: 129 Thanked: 48 Times	Can you tell at which gear this is happening. AFAIK the ddis does should not knock at those speeds.
	() Thanks

25th August 2009, 12:22	#6
Psycho Senior - BHPian Join Date: Jul 2004 Location: Bangalore Posts: 1,040 Thanked: 111 Times View My Garage	Would recommend that you get the fuel pump checked.
	() Thanks

25th August 2009, 17:20	#7
arun.sidhes BHPian Join Date: Oct 2007 Location: Chennai Posts: 64 Thanked: 0 Times	Ok i can try it if any air is caught in fuel or filter. i don't know what they have done in tunning and today moring also i have tried it , the sound is happening in 4th and 5th gear only. any idea about it? I have tried in shell diesel as well as HP turbo also, same sound is coming from engine cabin Last edited by Jaggu : 25th August 2009 at 17:37. Reason: Back to back posts.
	() Thanks

25th August 2009, 17:42	#8
Jaggu Team-BHP Support Join Date: May 2004 Location: Bangalore Posts: 20,379 Thanked: 17,320 Times	arun: What Psycho meant was to check the fuel pump feeding the diesel in the car, also try using normal IOC diesel and see if there is a difference. If its only in 4th and 5th gear, i would suggest showing the car at another reliable A.S.S and ask them to rule out any gearbox issues, just in case.
	() Thanks

25th August 2009, 22:26	#9
SirAlec Senior - BHPian Join Date: Sep 2006 Location: zxc Posts: 3,393 Thanked: 727 Times	i wonder what did they tune. Did they fiddle with the ECU? Did they touched the nozzles.? Just to be sure does the sound goes if you down shift.
	() Thanks

25th August 2009, 22:32	#10
mclaren1885 BANNED Join Date: Jul 2005 Location: Bangalore (the city of modded cars) !! Posts: 4,818 Thanked: 46 Times View My Garage Infractions: 0/1 (10)	In the Swift D, often the tappet noise can be assumed to be knocking. I hear this has been an issue with many customers complaining about the hydraulic tappets.
	() Thanks

25th August 2009, 23:24	#11
arun.sidhes BHPian Join Date: Oct 2007 Location: Chennai Posts: 64 Thanked: 0 Times	I don't know what they are tunned my engine...They didn't touched in nozzles.....can u suggest me for good mechanic in chennai for DDIs engine? I am not satisfied with ABT...Please help me Mod Note: Kindly avoid using dotty style of posting.
	() Thanks

25th August 2009, 23:26	#12
shibujp Senior - BHPian Join Date: Mar 2005 Location: Trivandrum Posts: 1,792 Thanked: 3,372 Times View My Garage	Arun, Is the knocking sound a metallic pinging noise? The normal diesel pitter patter will be more of a grating, gravelly noise. If using premium fuel it is better to stick to either premium only or normal diesel only. Mixing the two can cause the injectors to clog up. Seems like the additives in the premium fuel can loosen the residue left in the tank by normal fuel and clog up your injectors. Drive on, Shibu.
	() Thanks

25th August 2009, 23:35	#13
Piyush_Vroom BHPian Join Date: Jan 2008 Location: NewDelhi/Noida Posts: 222 Thanked: 5 Times	Get the injector nozzles checked and ECU Tuning pertaining to those. They can be the only reason
	() Thanks

26th August 2009, 00:24	#14
arun.sidhes BHPian Join Date: Oct 2007 Location: Chennai Posts: 64 Thanked: 0 Times	I have asked with mechanic, he told me its konocking sound.Before that i have mixed with premium and non premium also. now i am only using the HP turbo, but the sound is there. This week end i am going to check with injector nozzles checked and ECU Tuning pertaining Any good service center in chennai? Please suggest me
	() Thanks

26th August 2009, 14:58	#15
srini.rtmc Newbie Join Date: Apr 2008 Location: Utrecht, NL Posts: 24 Thanked: 2 Times	Does it happen when accelerating or holding the accelerator at a particular RPM? What does this mean? I have had similar issues at 1600-1800 RPM, observed mostly in 3rd gear. It happens when we maintain the same rpm. The clatter significantly changes and increase in noise is seen. Else it is not observed.
	() Thanks