Howdy, I recently got my first Datsun, a 280ZX from 1979. It runs great, but it has some cold start problems -- and I mean that literally. In the morning when I try it it cranks but won't turn over; when I get home after a day of it sitting in the sun I do have to give it some gas to get it up to idle but it eventually starts fine. I checked the oil and it isn't any more viscous than it should be. I've read that the stock air pumps from this model can sometimes result in this sort of issue and that it may be worth replacing if cleaning it doesn't work, has anyone else experienced something similar? Thanks in advance, Julian