Car[Stile SDX] developed some kind of problem since last 6-8 months. When down shifts the gear 3-2, engine dies. Especially when the clutch is fully pressed and if not engaging the 2nd gear within time limit[!]. But it normally won't stop if engages the gear. May it is about to die, but since gear engaged engine breaths again. This happens ONLY when A/C is on. Last month the timing chain has got changed, so I consulted the same Technician Rajesh. He says the clutch switch is broken, and need a replace. And of course I could feel kind of heavy/lazy engine. But soon after the timing chain has got changed, pick was awesome. Today I drove close 40 kms, many occasions I could feel the turbo was not kicking. In Second gear it does, but above that couldn't feel the pull after 2k rpm. Any wild guesses ? Possibly we could get more details of this once the switch got changed. Need to procure the switch from KHT.