PO307 comes up so i change the plugs and wires, reset the codes then take it for a ride....2 miles later the flashing light comes on again for a half a mile then just stays on solid? still getting the same code po307 but its no longer flashing? has anyone seen this before? 07 silverado 5.3 4WD flex thank you

 

cambiar bobinas y medir presion de cilindros

 

Probably need a new coil. That happened to me on #5.

 

thank you....... im gonna try the new coil