Hello All,
I have a 99 Expedition 4.6L 73,000. I've been experiencing misfires under load. Most usually around 45 to 50 mph 1400 rpm. If the truck needs a little oomph to go up an incline the engine will seem to misfire until I hit the accelerator and it shifts out of overdrive and the rpm's increase, and the engine runs easier.
From what I've read so far it could be bad coil packs, wires, plugs, etc. My question is, If I need a coil pack, is there a preferred brand other that a standard replacement from say napa, autozone, etc? I guess the same goes for plugs and wires.
Has anyone ever reliably kicked this issue the first time around, or is it hit and miss. The first step is hoping my mechanic has the obd tool to get the codes. If not it looks like I have to see the dealer...$$$$$$$.
Either reply to the group or remove nospam from my email address.
Thanks,
Brian