My 97 honda accord v6 cranks fine has no spark and no fuel. Fuel pump is not getting 12v. 12 volts present at coil and distributor. Changed fuel pump relay negative results. Checked all fuses under dash and under hood. Just finished replacing radiator started vehicle checked that thermostat opened and check for leaks. Shut vehicle off finished buttoning up. That was the last time it started.

Make sure you reconnected everything. Is the coolant full or maybe there is an air pocket.

Make sure you reconnected everything. Is the coolant full or maybe there is an air pocket.

The only connections were the fans and the ac clutch and it started and ran for a good 1/2 hour while I checked for leaks and thermostat opening once I finished that I shut it off and it will not statrt again, I have no spark and no fuel pump voltage.

. Clean the main ECM ground, which is likely located on the thermostat housing.

. Ensure the Check Engine Light comes on for 2 seconds and then goes out, when the ignition switch is turned to ON (Position II).

. Check the ignition switch for wear, pitting, or melting, if the problem persists.