i did some resource and seems like others have had the same problems. they said the sensor needs to replaced. here's what it does. the turn the key from acc without cranking engine. the gauge displays all types of numbers starts on the green goes to the red fastly like the gauge is starting up. the reading goes 14.8 and stays for a long time say 15 minutes. then the gauge will read lean start 15.0 then (---). jump back and forward then goes back to 14.8. the gauge does not move when cruising, fully throttle, etc. I DO APPRECIATE YOUR HELP!! THANKS