i have a 94 toyota pick up with 22re 5speed 4x4 ,the timimng chain and head gasket were just done , now truck ran great at first but then the engine light came on and then slowly the truck has been cutting out under acceleration and some times cruising , its doing it more and more , it cuts out like some ones turned the key off for a split second . i did notice that it was idling higher now to , its throwing code 25 . anyone got any ideas whats going on