I have a 95 psd that runs fine when you first start it but after about fifteen seconds its starts running rough and then it goes back to normal, if its cold it dies and you have to start it a few times before it goes away. It doesnt matter if its first thing in the morning or after driving several hours or what temp it is outside it always does it after being started. There are no problems after it gets past the missing it will run all day plenty of power. This has been going on for three weeks now and it is getting worse, Any ideas?