Hi, can anyone offer some help with ideas please. I have a 65, 289 with a 4 barrel carb that runs perfect in cool weather. The engine does not overheat, fuel is new and clean as is fuel lines and filter. It has a new fuel pump, insulated fuel lines. It is running the standard alloy spacer block under the carby.
On a hot day (over 35c) I get fuel vapor lock (no fuel in fuel filter next to carby). The engine cuts out and will not start. If I pour a bottle of cool water over the fuel pump, it restarts ok.
Any ideas what I can do to stop this. I was thinking of changing the alloy spacer block with one of those black plastic ??? ones and maybe fitting an electric fuel pump??