I had sold my pontiac catalina. It was in perfect shape. The motor ran perfect and was very clean.The person who bought it from me said there is something wrong with it and asked if I could come and check it out.I checked all the plugs they were dirty so i cleaned them and checked the fuel filter it was ok. I found I bad plug wire. The car feels like I am towing a trailer has no power it runs smooth but just no power any sugestions? any tips would be great. thanks,Troy

I had sold my pontiac catalina. It was in perfect shape. The motor ran perfect and was very clean.The person who bought it from me said there is something wrong with it and asked if I could come and check it out.I checked all the plugs they were dirty so i cleaned them and checked the fuel filter it was ok. I found I bad plug wire. The car feels like I am towing a trailer has no power it runs smooth but just no power any sugestions? any tips would be great. thanks,Troy

Depending on miles I would have to guess your timing chain has stretched a lot maybe even jumped a gear. Anything like 80K it should be replaced.