In the past 2 weeks I have been having some weird ignition problems ranging from occasional no starts to a perceivable miss and excessive lean pop. So far everything is new in the ign. Crane HI-6 ign., MSD billet dist. and TFI module, new autolite 24's gapped at .032, the plud wires are like months old and are ford racing 8mm wires. I pulled the codes today. The only code that came up was 18c with the KOEO. when I looked up the code in my scanner manual it say's ( loss of tach input / IDM circuit failure / SPOUT circuit grounded ) My factory tach is working. So has any body else had this. Im going to see if I can buy a new spout for the ign., but I have never heard of these failing. If that doesnt work what else is there.