Hey guys back in november i bought my cherokee with a blown engine. I pulled everything out and painted the engine bay and rebuilt the engine and bought all new parts and sensors so everything should be brand new except for the tranny and the torque converter. I finally tried to take it on its first drive today and it would get up to about 3000 rpms and then it would lurch forward and then drop back down to about 800 rpms. As it is revving up there’s no power going to the wheels.

 

i’m also getting the codes 12 (the battery was disconnected) 27(something with injectors) and 54(crankshaft not responding). I have new injectors and whole new distributor.