Pic Interference - EMF

[CrazyCooter]

Hi I have a car coil igniting a gas flame at a set time but what seems to happen is the lcd screen gets alot of garbage on it and the pic behaves erratic. When i test everything without the coil it works fine. I Believe its EMF but how do I stop this?

Regards
Crazy Cooter

[mackrackit]

How do you have the PIC connected to the coil? Relay, opto?

When I have PICs near welders I pit the PIC in a metal box with the power supply and box connected to a good earth ground. Faraday thing.