My freind gave me his boost gauge when he sold his mustang, its an autometer sport comp, but the problem instead of the needle sitting at 0, its sitting at 4 psi.... How can I fix this?
I had the same issue with mine except it was reading below 0 when the car was off. I sent it back to Autometer and they replaced it with a new one at no charge. Great customer service.
I would call Autometer. Like BlackSabbath said, they have good customer service. You might need to ask your friend for the receipt if they need to check if it is still under warrantee.