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Originally Posted by Vys De BlUR  I own a 2000 model santro. I recently got it tuned by a company mechanic. After that some times in 2nd or 1st gear the car sort of jumps forward and stalls. Then a mettallic knocking sound is heard from under the dash. Please help me sort this out guys. |
I got my 2000 model Santro tuned for better pickup almost immediately after purchase and did not have any problem for several years. Recently I did observe a similar problem after the car was serviced at Sanjay Hyundai. The car tends to stall at low speeds and you have to be prompt with the gear changes. Your clutch release should be gradual when the car starts to move from a stationary position (especially on a cold engine).
At Sanjay Hyundai, apart from routine service (which presumably includes engine tuning) they also changed my tail pipe and did clutch overhaul. So I am not sure what exactly is the cause of the slight stall at lower speeds. E.g. if the speed comes down below 15-20 kmph in second, the car tends to stall a little. At Sanjay Hyundai they said this is normal, but I did not observe this earlier.
I am now routinely using Speed 97 and I must say the car has excellent pickup. I am ignoring the slight tendency to stall at lower speeds and I have made the adjustment needed in my driving style.
My suggestion is to try one or two tankfulls of Speed 97 and see if the knocking sound disappears (due to the higher octane rating). Poor quality fuel could be one possible reason.