Hey all Im Jose and Im new to the ranger world not to wrenching though.I just got my 03 ranger edge 2 weeks ago and last night it let me down I was driving home and all of a sudden it lost half its power and the check engine light started flashing so a got a code scanner and its telling me its misfired on cylinders 4 5 6 it only has 89,000 miles so this has me stumpped any inoput I would greatly appreciate

 

Remove the multi-pin plug on the top of the coil pack and inspect it for any corrosion.
Spray some electrical contact cleaner in it and work the plug on and off a few times.

 

mine did this but it was 2 faulty plug wires. another option for you to check out

 

Check plugs and wires. Then the coilpack

 

it has new wires I installed them hours before it started losing power it ran fine right after I installed them the plugs are 2 weeks old I changed them when I got the truck they are the autolite double platinums thanks for all the suggestions

 

after more troubleshooting I discovered that the left manifold was glowing red after the truck warmed up when I turn on the truck when its cool it has power after one or two mins it loses half its power and it starts to buck and sputter so Im focusing on the driver side head since it was pinging on that side I could hear it going up hill could it be a blocked cat ?

I forgot to add I tested it with a different coil pack and wires and there was no difference

 

Get a fuel pressure tester and hook it up to the fuel rail.
Start the truck and run it for a minute.
Check the fuel pressure.
Shut off the truck and watch the pressure gauge.
If it drops immediately , you have one or more injectors stuck open.
That would cause a glowing manifold.

 

fuel injectors checked out fine I was advise to do a compression test and it was good I'll believing now that it might be a clogged cat it runs perfectly fine for about two mins I drove it around the block and after two mins it was stuggling to stay on and it would rev over 2,000 rpm once I got home I was able to rev to 3,000 rpm when I wasnt in gear I'm really stumped on this .What are the symptoms of a clogged catalytic convertor

 

UPDATE

The issue was the pre catalytic converter on the left side I "unplugged " it and put it back together and the truck has wayyyy more power since I bought it three weeks ago

Thanks for all the suggestions