ok i have a front mount alpine turbo with a custom built header with a koso [2nd one now] gauge..and when i put on a new a/f sensor in the pipe.. it works perfect till about 20 mins run time,and then it just goes to err-1.which i no means its junk,,im only running about 2-3 gals of 110 mix..is this gauge a pos.or maybe i have a sensor eating sled...what does everybody else run..im done putting $60 sensors that only last 20 mins in this beast..thanx for any info chris..