1200-1500rpm with illuminated battery warning light , just happened all of a sudden . not had chance to check for air leaks as yet had a quick visual every thing seams ok no obvious signs . does the 22r have error codes??? i do have connecter in dash and a few wires on to carb model is sr5 1992 LNOS not sure if it is slightly modified as things seam different to other year related models . no catalytic on exhaust . battery is fine vaultage is 14.7 at idle , any suggestions ???