> > Any thoughts on what else to check?
>
> Main relay;this turns on the fuel pump to maintain fuel pressure for the
> EFI.
>
> How-to;
> http://www.markl.f9.co.uk/howto/elec...main-relay.htm

I agree that the main relay is the most likely culprit. Another
possibility is the Ignition Control Module, often called the igniter.