I have a 1997 Jetta with a 2.0 gasoline engine-fuel injection. It has a manual transmission. It has 110,000 miles. Starting in Feb of 2007, when the tempature dropped below freezing it would not start in the mornings, but as the day warmed up, it would start. I took it to my repair shop but there was a warm spell and it started everytime for them. They put new plugs in the car. It got cold again and the car would not start early but would later. I started putting a low wattage bulb under the hood and that seemed to solve that problem. Gradually it had trouble starting at higher temps and the light ceased to be effective. Now if will not start at all. The engine turns over just fine, but there is no attempt to run. Is there a there a cold start valve on this engine? If not, what are the other possible solutions?