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Old 6th May 2008, 14:35   #1
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Default 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?
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Old 6th May 2008, 14:58   #2
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One possibility is bad fuel.

What is your odometer reading?
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Old 6th May 2008, 16:28   #3
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Quote:
Originally Posted by hrag View Post
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?
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Old 6th May 2008, 16:36   #4
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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.
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Old 6th May 2008, 16:43   #5
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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.
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Old 6th May 2008, 17:49   #6
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@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:
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Old 6th May 2008, 18:24   #7
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You get System G at BP bunks. Not sure about other bunks. Give it a shot - won't harm the engine in any way.
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Old 21st December 2008, 21:53   #8
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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.
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Old 21st December 2008, 22:46   #9
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On which gear you were in. As I feel 1.2 Xeta is bit underpowered.
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