i just finish overhalling the eng. after 10 min the eng oil press light flashes on and off at 500 rpm if i raise the rpm to 1000 the lights go out .

i also can hear an humming noise not sure where from

it is very hard to keep the rpm steady at 1000 when i start the car it go up to 2500 rpm and then drops.

any sugestion will help

 

the idle is too slow it should be closer to 750 at idle. could be part of the problem..