My 85 Jetta Diesel has issues starting in all weather below 45 degrees Fahrenheit. I just tried starting it in 15 degree weather and ran down the battery trying to start it, which is what usually occurs and I have to keep jumping it (The battery is new). Once it starts, if it does, it smokes like hell for a few minutes and then runs perfectly. I have used the cold-start knob every time.
What is the problem with my car? Injection timing?