I see this come up often and I have replaced many parts for this 95 chevy 6.5L Turbo. Problem nobody around here knows how to work on diesels ! So I am on my own..Was wondering a few things. I heard there is some plastic part in the fuel filter that should be and I IS NOT ! also I found a small fuel line leek above the tank . Now tell me after replaceing many parts and still having the rough start, herky jerky, coughing, sputtering can this be the problem ??? 178 thous miles and never I mean NEVER had a problem till now ! I know lucky ...but could this leak cause the problem with not enough pressure ?