I have a boat with two engines and two IQ3 with the MEFI4 ECM transmitting data. I had an Issue with one of the computers and when I replaced it I had problems getting the info back to the dash. Talked to RP support and since I had old modules, they recommended that I buy the newer module and wire harness. So after the new equipment installed and on the phone with the support, still no dash info from the MEFI. If anyone had had this problem and figured out some issues any info would be greatly appreciated! Thanks, Cayne.