First of all, the blog is the wrong section for your request for help. Suggest you re-post it in the FORUM, in the 240Z section.

Second of all, does it immediately re-start, or require to sit awhile?

It sounds to me like a fuel starvation problem, crud in the tank or lines. If it takes awhile to re-start, SEE if it will re-start immediately using starter fluid. If so, then you know it's a fuel, and not an igition problem.

When it happens, pop the hood and touch the inside portion of the fuel rail....the side facing the valve cover. I'll bet you'll burn your fingers. If so it's vapour lock..same thing as mine. The fuel rail is too close to the valve cover and there is not enough air flow under the hood. If you would drive around with no hood on, this would not happen. So here's an easy fix. Get some heat resistant insulation wrap ...header wrap will do and insulate the rails. I took the rails off...a few bolts, disconnect the fuel lines and this way you can do a nice job on a bench. Next thing is to disconnect the manifold heating. Below the thrmostat you'll see a twisted braided hose that connects to a line to the left of the intake manifold. It comes out the right side mainifold, wraps around the rear part of the engine and ties back into a 'Y' where the heater core return ties in. You'll have to drain the rad somewhat then disconnect the line at the thermostat housing (undet the stat). I screwed out the nipple and threaded in a plug...I think it's 3/8 pipe thread..not sure but picked it up at Home Depot plumming dept. Now disconnect the line on the passenger side where it ties into the 'Y' and plug that end. I sliped a short pipe with the end capped.

Another fix I read that also helped was installing 280 hood vents to get rid of some heat. What I plan on doing is getting vented lids where the battery and washer fluid is to allow some heat to escape. This way I won't have to cut into the hood. With the 1st two fixes, my car does not stumble or hesitate anymore. I also eliminated a few hoses that could spring a leak. Manifold heating is not required unless you drive it in the winter... Check the pics of my car