I installed a PFC on my car now it seems when i start the car it has a real rough idle and the first few mile the power seems to surge at light throttle. When the car is warm after running a few miles it seems to be fine. Do you think i might have a vaccumn problem? 15 k on new motor and 106 on car only selected vac. lines where replaced with motor some lines are as hard as plastic.Thank for any information you may have.