So my ranger is a 4.0L 4x4 it shakes idles rough and it says cylinder 2, 4 and 6 has a misfire also it also says system lean on bank 1 and 2 and also ignition coil c. Also it doesn't accelerate properly basically it doesn't switch gears like its supposed to

 

Lean engine codes does not mean the engine is running Lean, most codes are in computerese so are never to be taken literally.

Lean means the computer is having to add more gasoline that it has calculated for specific RPMs.

Computer gets the amount of air coming in from the MAF(mass air flow) sensor
It then calculates how much gas to add to get 14.7:1 Air:Fuel Ratio
It adds that amount of gas with fuel injectors
O2 sensors on the exhaust pipes read the Oxygen levels in the exhaust, if too much Oxygen computer adds more fuel, if to little Oxygen computer adds Less fuel

If computer is adding more than 15% more fuel than calculated it will set a Lean code
If you get the Lean code on BOTH Banks of a V6 engine then it usually means you have a vacuum leak in upper intake or a dirty MAF sensor.
Could also be low fuel pressure but long shot on that.

Misfires means Oxygen is not being burned inside the cylinder, so it is dumped into exhaust pipes.
So misfires can also set Lean codes.

So first think would be to look at the spark plugs to see if they can tell you what is happening inside the cylinders
Google: spark plug condition

Looks of pictures of what stories they can tell.

Coil packs on these 4.0l don't fail often, my 1994 is still working fine
2 and 6 share the same coil in the coil pack
Coil pack spark plug wires:
3 4
2 6
1 5
Front

Notice the 5, 6, 4 side, that is often mis-wired, because of 1, 2. 3 side people expect 4, 5, 6 on the other side

3 and 4 share a coil
2 and 6 share a coil
1 and 5 share a coil
There are only 3 coils ion the coil pack


Vacuum leak is a very common issue on these.
Make sure lower intake bolts are snug
Check PCV hose and Brake power booster hose

After engine is warmed up and idling unplug the IAC(idle air control) valve's wires
engine RPMs should drop down low, 500 or lower, engine may even stall, either is good.
If RPMs are 700 or higher then big vacuum leak

 

Thank you very much I checked my spark plugs again and replaced them now my truck runs a lot smother

 

my truck will start right up most of the time and start then die sometimes it also stalls at all speeds and stalls at idle alot cleaned MAF replaced IAC,TPS,CTS replaced engine about a year ago,,,HELP

 

Welcome to the forum

You should start your own thread, it is FREE

Does the engine always restart, or do you have to turn OFF the key and then turn it back ON to restart after a stall?

The newer Rangers, 2006 and up, would cycle fuel pump off and on depending on engine load, so your fuel pump may be failing, it is not turning back on all the time so engine stalls.
Also change fuel filter if it hasn't been change in the last 5 years

 

thanks Ron i started my own thread usually starts right back up