I have a 1999 jeep grand Cherokee limited v8 4.7, had a new motor put in, new sensors, new fuel pump assembly, new fuel lines, n it cranks but runs like ****, but only if u hold the gas or it dies, n blows out light blue to almost white smoke, I did the key trick on off, n got code ( p 0505) someone please help
Changed sensors? What sensor, there is quite s few,,, Here you Go mr. P0505 (M) Idle Air Control Motor Circuits Replace idle air control motor. http://www.wjjeeps.com/faultcodes.htm Disconect battery for atleast 15 min to reset while replaceing sensor, good luck
Or check wiring....cause the engine was just replaced.