I have a 2017 BS 4 CL 350. Few months ago I had a problem of engine sputtering as if low on fuel. No clue how it happened as my tank had sufficient fuel. Changed from 'ON' to "RES" but to no avail. Since then this problem - Engine sputtering (or missing) especially when starting for a few kilometers, has been harrowing me to no end. Recently at a Service Station at Kolkata a kit was changed and the problem was rectified only temporarily. I have learned that this is in BS4 models only as the fuel vapor sometimes don't escape hence low air/fuel mixture and leave the engine sputtering. As of now I am leaving the Fuel cap open for few seconds before starting off.

However, is there a permanent solution to this ?