I have a 88 comanchee. It is shuting down after about 30min of idel time or drive time. I have changed cps, tps ,fuel pump,coil,ignition modul,checked ground cabel, and the yellow box under dash .Im thinking of changing out the distrbuter next. Well changed distrbuter no change still shuts down after 30 min . I have noticed it runs longer the colder it is (out side temp) Does anyone know were the automatic shutdown relay switch is located ????????? The haynes manual has it listed for my i6 4.0L .