Problem with 5110lcd

Hello, I made a small project with arduino uno and nokia5110lcd for my motorcycle. Idea is that arduino should turn on when I turn on the ignition. Problem is, that lcd works fine with only ignition on, but when I start the engine, everything from lcd disappears.. I double checked voltage on arduino and on lcd, it is fine. Backlight stays on even with engine on. But data doesnt come to the lcd.. could it be because of the lcd wires go near ignition coils, and somehow gets corrupted? Thanks in advance

Could be. Could be also because 5110s can be a b it fragile, and subject to vibration. Try pressing on the screen.