My dragster starting acting very strange today. Would turn on fuel pump (fuse issue) then tach is bouncing all over throughout rpm range from idle on. It's a 582 with msd 7al3 and 16 volt system. Car seems to run fine but I am concerned the ignition is shot. Any thoughts from the group. Thanks Todd
X2 on the grounds and don't count on the chassis for a ground. Run a wire from the battery to the MSD and one from the battery to the heads. You also should have a dedicated wire from the positive battery terminal to the MSD 12V. If it's not wired like that change it even if it has been like that since the car was built.