Yes, the suppressors are only fitted by law to block intererence, similar to a micro-filter on your telephone line for internet access, the suppressor is simply a capacitor that stores at max 2microfarads and they do fail, just ensue when bypassing that the earth you fit is strong and robust and cannot loosen through vibration, but to be safe fit a new supressor when possible and as with all capacitors observe the correct polarity
Glen lyons, July 2010