This sounds like a carburetor with an internal leak to me. Does this car have a Holley carburetor, or a Carter? Dick Benjamin ----- Original Message ----- From: "Leslie" <kansas@xxxxxxxxxxxxxx> To: "Multiple recipients of list mailing-list" <mailing-list@xxxxxxxxxxxxxxxx> Sent: Monday, March 03, 2003 4:46 PM Subject: IML: Please Welcome a New Member Ed Hesse (1968) > New Subscriber(s): Ed Hesse > Email Address is: prntbear@xxxxxxxxxxxxx > Member Location: Philadelphia > > Car(s) owned: > > Self-Introduction: Recently acquired 68 Coupe has a new tune up and I > noticed an crankcase overfill which I have corrected. Long list of "to-do's" > so I'm starting with the first and biggest issue: > > I have a serious engine problem. The engine is running terribly rough with > black smoke coming from the exhaust. Plugs 1,3,5,7 look normal but plugs > 2,4,6,8 have heavy carbon deposit. Have replaced fuel filter, tightened carb > and checked for vacuum leaks.There seems to be a moment of smooth running > when the engine is first started, and then it gradually gets rougher until > it will no longer idle properly and stalls. Let it sit for a while, hours, > and then the same thing. Also ran smooth when it was running out of gas. It > is using up gas faster than I can replace it. As it is a sorry sight, I have > avoided putting it on the road until I have the smoke cleared up, no pun > intended. > > It looks bad to me. Any suggestions? > > > EdH > '68 Crown Coupe > > > > > > > >