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Greetings friends, I've an issue with the Mitsubishi Lancer (2008 make). Yesterday morning my car started normally and after the startup the RPM goes to 2k (which is normal) and in few seconds the engine made a sound like a cold start. RPM was fluctuating rapidly from 0.5 k - 2 k. It continued around 5 minutes and I didn't turn off the engine. After the heat was raised up to 50% the engine was acting normal, RPM came back to 0.7 - 0.8. During the time of the issue engine was clearly shaking (i opened up the bonnet and checked). When things became normal I drive around and the issue never came later during that day. But it occurred this morning too, similar symptoms and the knocking was gone around in 5 mins time. I've observed that it was smokey than before when this happens, and the smoke doesn't smell like patrol during that first 5 mins of start. (later it smells normal). The common facts on these two days were the rain. There was continuous rain here and the environment is cold (below 20 c). Now the milage goes as 88k and I have done a engine tuneup from Mr, Dhammika Frenando on the mark 82k (he changed the plugs and said there are no faults found by the scanner). I've heard that EFIs doesn't have cold start (i'm not sure whether it's correct) I'm planning to take her to the agents at Katugastota tomorrow, I value any advice / ideas from experts. Thanks a lot !

When changing gear while running with AC, Check lights are indicated and engine stops. I have Corolla AE 100 Manual EFI.RPM also varying up and down while AC is switch on. Is it possible to figure out the problem?