Re: Misfire under load 99 4.6
Thanks, I just changed the fuel filter, the weather is here is kind is still
kind of cold to change the plugs and everything else. I was going to buy a
code scanner and then see where the miss is, and try to swap the packs and
see if the problem moves.
I like the idea of checking for spark in the dark. I'll give that a shot.
I've seen cheap code scanners for about $29.95. That should give me a start.
"n3lka" <firstname.lastname@example.org> wrote in message
> 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.