needabronco
Bronco Guru
OK here's an ongoing issue that I can't quite figure out. In the last 6 years I've been through 5 sets of spark plug wires, or approximately every 2000 miles or so.
It seems when I drive my bronco at highway speeds for 70+ miles I develop a misfire. When the torque converter isn't locked it's not as noticable as when I'm in overdrive then the shudder is very obvious. Every time I've traced the issue down to the spark plug wires. I change them out and all is good till the next highway trip. So far I've been through two sets of Bosch wires, Napa wires and 2 sets of Autozone wires (a cheap set and their premium set). I've never figured out exactly which cylinder is eating wires either so I don't honestly know if it's random or specific to one or more cylinders. I've changed exhaust manifolds from stock to WH shorties and I have plenty of header clearance.
I've got Mustang efi and an AOD, no codes and everything mechanically is in good to great condition.
What is causing this issue? My next step is going to be a new cap and rotor along with new wires, but I really want to figure out the cause so I can finally fix this issue. Thanks.
It seems when I drive my bronco at highway speeds for 70+ miles I develop a misfire. When the torque converter isn't locked it's not as noticable as when I'm in overdrive then the shudder is very obvious. Every time I've traced the issue down to the spark plug wires. I change them out and all is good till the next highway trip. So far I've been through two sets of Bosch wires, Napa wires and 2 sets of Autozone wires (a cheap set and their premium set). I've never figured out exactly which cylinder is eating wires either so I don't honestly know if it's random or specific to one or more cylinders. I've changed exhaust manifolds from stock to WH shorties and I have plenty of header clearance.
I've got Mustang efi and an AOD, no codes and everything mechanically is in good to great condition.
What is causing this issue? My next step is going to be a new cap and rotor along with new wires, but I really want to figure out the cause so I can finally fix this issue. Thanks.