Am new at the vw motors My question is those the airpump starts every start? because it been super cold here in Michigan last two days, i started the NB and i didnt hear the pump and the motor started to shake and turn off i turn it back on and gave it a little gas to keep it at 1500RPM for 1 min then i let it idel it was fine it was 5 degrees this moring, any idea let me know (no cel came on) need info

Thanks