I have an Apexi El Egt gauge. I have it mounted in the #1 runner. It has been working fine until yesterday. instead of holding a solid temp. it was jumping up and down a bit. Finally the needle fell all the way down to the 3 which is the lowest it goes, at that time it would only rise when I floored it, fluctuate sporadically then instantly fall back down to the 3 when I let off. Today it won't even rise when I floor it . Does this sound like a bad probe. I don't believe it could be the cylinder, everything sounds like it is running perfectly with no loss of power. Any suggestions would be helpful

Thanks,

Shane