On the cylinder thats firing ...Try the dead coil you replaced on the working (firing) cylinder. if it fires? The problem is not the coils. try cleaning all connections going to coil.
You may need to replace the plug wires after many miles they become more resistive and deliver weak or no spark to the plugs. It could also be the ignition module it is common for GM vehicles in that year range to have failing modules.
143 views
Usually answered in minutes!
×