I have the "check engine" light and my analyzer shows P1316. I can reset the code and the light and it seems to come back on about 25 miles or a day later.

I am almost certain the O2 sensors are not to blame because I have an Actron 9180 that I literally drive around with using a custom real time data monitor set for the O2 sensors and they are working excellent, both front and back (the fronts were replaced 100 miles ago.)

In addition, I am running premium, it has a new airfilter, plugs and wires (Bosch) and the truck is running really well, no misfires, plenty of power.

Not sure where to go from here. Please advise.

 

Is that the only code? I just googled, and some people that are getting just that code were talking about bad stuff like sticking valves.

 

Thats the only code. I did put some seafoam in it yesterday just to clean it a bit. But the code was there before yesterday and came back on today.

Looks like a compresion check is due. I was hoping to not hook that gauge up. Ignorance is bliss sometimes.

 

Misfiring - 1316,1314,0304 HELP!!!!!!!! - Land Rover Forums : Land Rover and Range Rover Forum

 

You need to dump those plug wires and get some real ones, sorry but they just will not last.
Kingsborne, STI or Magnecor.