i'm having the same problem with my friend 99 LS INTEGRA right now..i just swap a JDM 97 B20Byeah i had that problem as well when i swapped a b20 in my old integra in -7 degree weather! f**ken sucked! I just swapped the oil pumps and everything was dandy....
no you don't need to swap the oil pump. its simpler then that. you can do alot with wiring IF you know what you are doing. what ecu are you using? the 99 LS ecu? or something different?i'm having the same problem with my friend 99 LS INTEGRA right now..i just swap a JDM 97 B20B
and the engine dosen't have the crank sensor either..so all i have to do is swap the oil pum and problem solve
i really need to fix that on his car...we need to pass inspection on the car