Engine won't start when hot

[vanmazda]

Four days ago my 1996 Protege developed a problem with starting when the engine is hot. The engine starts fine when cold and runs with no problems. When I turn the key to restart when the engine is hot, there is no response at all. I took it to a Mazda dealer who ran diagnostics and changed the plugs and wire set and cleaned the intake and fuel injection system. I drove it home (20 minutes driving time) and tried to restart and had the same problem as before. Anyone have any ideas what the problem is?

 

[grey1]

check for spark when it is "hot", looking for coil failure. (coil is inside the distributor I think.)

or it might be faulty temperture sensor sending wrong signals to ECM