hello everyone i hope to get some help with my 95 4runner... i just rebuilt the hole engine everything came out fine but the oil pressure... i got no pressure im sure the sensor works i tried the grease thing and no good results... when the engine is cold the needle goes up to less than half but when it warms up the needle goes all the way down like if it wasnt working what can i do to fix it or whats the correct way to prime the pump???? 3.0 v6 engine 2wd