1.8 Diesel BJ 89 Start problems

Hi, I just bought a 1. ́8 D. The thing jumps in the morning or after 2 hours only after plenty of locality and delivery of a powerful cloud. I found here an article about where it should be the glow candles – unfortunately the solution was still open. Does one of you have a tip on how to get to the track of the error? Thanks to everyone.