- Jul 20, 2006
- 1963 Convertible, 1969 Lemans Blue Coupe, 1970 LS5
I seem to have a strange issue with my 70 ls5. I have been going through plugs after it sits overnight. This thing has always run a little fat and have not had a problem until recently. I thought it was the the carb so I purchased a new Holley 750 4 corner and I'm having the same problem. I also checked spark, fuel pump and all the other obvious things. Could my problem be related to a vac. leak in the car??? If it were a vac leak wouldn't the car run lean?? I have had a couple of mechanics look at it and we did jet the carb down. Still the same problems. After going through this for the past month am I missing something simple? Could it be a vac leak?? It seems to point to a fuel problem and everything that could be replaced was. Any direction would help.