90 F-150 check engine light.

on my 90 F-150 the check engine light stays on i've done everything I can think of but it just wont go off. i dont know what else to do :dunno:

if you have any ideas let me know please.:1zhelp:

Take it and get the codes read, the light only comes on when it senses a fault in the system. Get the code than go from there. A little word of advise, go to the dealer and have them read it, the advance auto stores and such cannot read everycode that may be present, causing you to spend more $$ than needed.