I have a 2004 Four Winns 268 Vista with a Vovlo Penta 5.7 GI (350). I have replaced the plugs, wires, Distributor Cap and Rotor, IAC valve, Fuel filters, cleaned the throttle body, replaced the temp sending unit and it is still idling rough and does not run full speed. Before I hang some more parts I thought I would get some opinions. It generally starts fine when it is cold but gets harder to start as it warms up. The idle seems to get worse as it warms up also. I do not have a code reader but was looking at buying one. Any help would be appreciated.
