Greeting Aspirant,

As you Got 400 in KEAM and 90% in PCM, so as per that your KEAM Rank will be around 2500-2700 with a KEAM Score of 390.16.

According to your Rank I am Suggesting Some Colleges:

• Government Engineering College, Barton Hill: B.Tech. in Electronics and Communication Engineering
• Mar Athanasius College of Engineering: B.Tech. in Mechanical Engineering
• Government Engineering College, Idukki: B.Tech. in Mechanical Engineering
• Rajiv Gandhi Institute of Technology, Kerala: B.Tech. in Mechanical Engineering
• Sree Chitra Thirunal College of Engineering: B.Tech. in Mechanical Engineering

Hope My Answer Helped You.

Best Of Luck For Future.