2002 Ford F150 Truck 5.4L 4x4 with engine code P0357

Question

What would make cyl. #7 injector pulse signal go and come. Wires o, connectors and has code Po357 ? Noid light doesn't flash when engine has miss. Last for 5 or up to 30 mins then starts flashing again. Plug in smooth engine. Driver drives for day or two ok then starts again. Comes in with miss noid doesn't flash go to check it starts working again. Can you help?
Thanks Darin

Answer 1

P0357 Ignition coil "G" primary /secondary circuit malfunction

The coil driver will make injector signal come and go,this is located in the ECM. When there is a ignition misfire especially a COP (coil on plug) that is non operational the ECM turns off the injector to protect the catalytic,

Answer 2

P0357 FORD - Ignition Coil 'G' Primary/Secondary Circuit Malfunction
Read more: https://www.autocodes.com/p0357_ford.html