need good experienced advice on engine ?

[turbobooster]

well just recently my " engine service soon " light came on i have no clue as to why its came on maybe one of u guys can tell me what it can be ? or what to look for or if i should just take it to get checked? any advice is welcome thanx and its 85 t type

 

[SLOW_85]

You need to pull the code.
The directions are here:
http://www.gnttype.org/maint/malf.html

As always gnttype.org best source for information,check it out.