I had the prosport boost, oil temp., and oil pres. gauges, they were absolute junk. Sold all of them and bought one defi red racer boost gauge and couldn't be happier. I hate to agree with it, but you do get what you pay for.

 

maybe your just running crazy boost n u never knew it?

 

another props for defi

 

check the connections. Very well just could be a loose connection touching and then untouching