Hi, I'm new here. I thought I'd post online to figure out what's wrong with my truck because I can't seem to get any local mechanics to help me with it without getting fed a bunch of b.s.

This has been happening for at least a year.

I get an error code. It's a misfire on cylinder six. The CEL comes on, the engine shakes, I rev the engine or drive for a few miles and everything calms down. The caution light generally stays on. This happens everyday, more so when it is cold.

I have swapped out the plugs three times. There is no coolant on the plug. There is nothing I can see to be obviously causing the problem. No dripping, no leaks, no broken hoses or cracks or anything. Could it be a wiring issue?

It's a 99 Ranger, 3.0 lit V6. Good truck, but lots of problems since I got it.

Any help is appreciated.

 

check igniter wire to cyl 6, and the coil itself, the wire may not be making a good connection therefore intermittent spurts of fire and misfire. lastly I'd take the truck to a reputable "tuner" shop and have them delve into the trucks computer, it could simply be a mis-read that your engine is adapting for that is causing your perfectly fine engine to act up, just ideas, idk, not a pro by any means

 

i had the same problem on my 98 ranger it was the 6th cyl too. i had a guy look at it and al it was for me was the plugs. what kinda plugs you running? it could also be the plug wires

 

yep, check coil and all resulting wires to sparks, arent hard to replace and often give you a small boost in HP and TQ

 

I just had same problem.Hope its not as bad as mine.Turned out cylinder 6 had 0 compression.My truck had 180k on it.Traded it in on a 2010 Ranger Sport 4.0.Was sorry to see this truck go.Suoer reliable.

 

can you check spark with a timing light?

 

plug wires. coil pack. check those first. mine was like that and the cause was bad wire.

 

I had same issue with my 99 3.0. swapped coil pack, wires, new plug. ended up being the fuel injector. Cylinder #1.