hi to everybody!i'm new of this forum.i have this problem with 737-800WL NGX :when i go to start engine 2 first (as from procedure)the percentage of N2 remains to 18.1% instead of reaching 25% to make the engine start.i also get a LOW OIL PRESSURE on the EFIS panel...is it normal or this signal exstinguishes after the engine starts??i follow 100% checklist procedures.may you help me please??? sorry if i made mistakes with english but isn't my languagethanks in advance guys, regards!!!!!