Has anyone had any luck getting accurate idle AFR with a tail pipe sniffing rig? We have the innovate tail pipe clamp and LM1 but it's measuring in the 19:1 at idle. Would it help to extend the sniffter so it can be deeper in the exhaust? you can idle up to 3K rpm and it will go to 14.7 but does anyone have any suggestions on getting good idle readings with a clamp on wideband.