[goneawhall]

i have a 97' jeep grand cherokee limited with a 5.2 liter (318) sometimes i go to start it and the is no electrical everything is dead!!! play with key tumbler the starts up. next it get to operating temp (210) and cuts out!! like yo just pulled the coil out. you can here the new fuel pump (filter) humming but no spark! after ten minutes it runs. then cuts out again!!
replaced cam sensor, air intake sensor, rewired batery to starter,
please help

 

[sandman55]

Maybe the key switch is faulty so get a 12 volt globe and connect two wires to it then ground one wire to a good ground and with the other wire trace where you have 12 volts (globe lights up) you might find you have it at the supply side of the key switch but not on the outgoing side. You could leave the globe connected while you wait for the fault to occur. You could have several small globes temporarily connected in place before and after the switch.