Thank AAndrews, I'll check it out. For the new water and oil gauges I removed the sender feeds from the dash plug and tied into them separate from the cluster so I don't think they would affect it. But I did not check voltage output of the IVR. I'll check that. I'm also going to recheck the grounding of the tank itself as Mike69cuda suggested. Could be the factory strap is not good enough and I need a hard wired ground. Some good info here.