Engine Knocking - Indica Xeta 1.2

dmplog · 6th May 2008, 14:35

Hi All,
I was driving towards Pune on NH-4 over last weekend. It was in the hot afternoon and the car was fully loaded (5 passengers + Luggage in the boot). AC was on and I was driving around 90-110 kmph all along.
Then I filled fuel ('full' tank of Speed) and started off again. However somewhere before Khambataki Ghat's tunnel, Car started knocking. I noticed that the Engine RPM was around 3000 and Temperature gage was well below 'Red' indicator.
I reduced the speed and switched off the AC. The knocking reduced but continued intermittently. Thankfully, I soon reached the Ghambataki tunnel downhill and I completely took foot off the accelerator. Few minutes like this and knocking was gone.

I was trying to analyze following,
- What exactly caused this?
- What exactly resolved the problem.
- What could be done to avoid knocking.
- Was the Engine was stressed too much?

Any ideas on this?

hrag · 6th May 2008, 14:58

One possibility is bad fuel.

What is your odometer reading?

dmplog · 6th May 2008, 16:28

Quote:

Originally Posted by hrag

One possibility is bad fuel.
What is your odometer reading?

Odometer is around 15000 kms. Does bad fuel cause such a problem?
I have my Servicing due next week. Can I check with the Service Station about this? Will any diagnostic facility be available there?

TrueDreamer · 6th May 2008, 16:36

I would say its 100% with Bad Speed Fuel. I had also experienced this when filled BP Normal at a Filling Station in a not so good town. And i was hearing the knocking at even below 80. Managed somehow without AC and drove it very light foot and consumed it all. Next refill its all fine. Lesson Learned : Never fill at places which you are unfamiliar with.

EDIT : We have the same bike and car though different years and variants

hrag · 6th May 2008, 16:43

I'd say it is bad fuel. Try adding System G for some time.

I asked about the odometer reading because missing can occur when its time to change the plugs and HT cables.

dmplog · 6th May 2008, 17:49

@hrag - Thanks! Will the Tata Service Center have this. I plan to ask them to add it during next weeks' Service.

@TrueDreamer - True. Same - Same! Though, I sold Victor few month's back! :-( Wasn't using it. But, I found TVS Victor GLX to be awesome. Comfortable, great pickup and Economy! Cheers cheers:

hrag · 6th May 2008, 18:24

You get System G at BP bunks. Not sure about other bunks. Give it a shot - won't harm the engine in any way.

amu1983 · 21st December 2008, 21:53

There's probably a separate thread on this already.. But does System G really help? Particularly, does it help reduce the knocking? My Xeta knocks a bit too, albeit intermittently.

SirAlec · 21st December 2008, 22:46

On which gear you were in. As I feel 1.2 Xeta is bit underpowered.

6th May 2008, 14:35	#1
dmplog BHPian Join Date: Oct 2007 Location: Pune Posts: 312 Thanked: 377 Times	Engine Knocking - Indica Xeta 1.2 Hi All, I was driving towards Pune on NH-4 over last weekend. It was in the hot afternoon and the car was fully loaded (5 passengers + Luggage in the boot). AC was on and I was driving around 90-110 kmph all along. Then I filled fuel ('full' tank of Speed) and started off again. However somewhere before Khambataki Ghat's tunnel, Car started knocking. I noticed that the Engine RPM was around 3000 and Temperature gage was well below 'Red' indicator. I reduced the speed and switched off the AC. The knocking reduced but continued intermittently. Thankfully, I soon reached the Ghambataki tunnel downhill and I completely took foot off the accelerator. Few minutes like this and knocking was gone. I was trying to analyze following, - What exactly caused this? - What exactly resolved the problem. - What could be done to avoid knocking. - Was the Engine was stressed too much? Any ideas on this?
	() Thanks

6th May 2008, 14:58	#2
hrag BANNED Join Date: Nov 2004 Location: Bangalore / Madras Posts: 1,982 Thanked: 31 Times	One possibility is bad fuel. What is your odometer reading?
	() Thanks

6th May 2008, 16:36	#4
TrueDreamer BHPian Join Date: Nov 2007 Location: Hyderabad Posts: 276 Thanked: 16 Times	I would say its 100% with Bad Speed Fuel. I had also experienced this when filled BP Normal at a Filling Station in a not so good town. And i was hearing the knocking at even below 80. Managed somehow without AC and drove it very light foot and consumed it all. Next refill its all fine. Lesson Learned : Never fill at places which you are unfamiliar with. EDIT : We have the same bike and car though different years and variants Last edited by TrueDreamer : 6th May 2008 at 16:37.
	() Thanks

6th May 2008, 16:43	#5
hrag BANNED Join Date: Nov 2004 Location: Bangalore / Madras Posts: 1,982 Thanked: 31 Times	I'd say it is bad fuel. Try adding System G for some time. I asked about the odometer reading because missing can occur when its time to change the plugs and HT cables.
	() Thanks

6th May 2008, 17:49	#6
dmplog BHPian Join Date: Oct 2007 Location: Pune Posts: 312 Thanked: 377 Times	@hrag - Thanks! Will the Tata Service Center have this. I plan to ask them to add it during next weeks' Service. @TrueDreamer - True. Same - Same! Though, I sold Victor few month's back! :-( Wasn't using it. But, I found TVS Victor GLX to be awesome. Comfortable, great pickup and Economy! Cheers cheers:
	() Thanks

6th May 2008, 18:24	#7
hrag BANNED Join Date: Nov 2004 Location: Bangalore / Madras Posts: 1,982 Thanked: 31 Times	You get System G at BP bunks. Not sure about other bunks. Give it a shot - won't harm the engine in any way.
	() Thanks

21st December 2008, 21:53	#8
amu1983 BHPian Join Date: Feb 2007 Location: Pune Posts: 144 Thanked: 0 Times	There's probably a separate thread on this already.. But does System G really help? Particularly, does it help reduce the knocking? My Xeta knocks a bit too, albeit intermittently.
	() Thanks

21st December 2008, 22:46	#9
SirAlec Senior - BHPian Join Date: Sep 2006 Location: zxc Posts: 3,393 Thanked: 726 Times	On which gear you were in. As I feel 1.2 Xeta is bit underpowered.
	() Thanks