Hey,

Well you do have a chance to get an admission if you perform brilliant in your CAT and the subsequent rounds of Fms, DU. FMS do look up for past academic records and give points for it but they don't give it much importance if you do well in your CAT result and then the subsequent rounds of it like GD, PI, extempore speech. You need to give your best and keep a target of getting 99+ percentile and nothing less if you're a GEM (General engineering male).

Hope this helps.