I don't have an answer to your question, but I do have something to add. We have an '06 LE 4x4 with a little over 60K. A few months ago, I had to take it in to the dealer for service. The check engine light came on right after I put fuel in it. They replaced the fuel sending unit in the tank. Since then, the mileage has dropped by about 2mpg. We used to get around 19-20mpg on the road, now it is about 17-18mpg. I figured they reflashed the ECU. I would be very upset if it was below 14mpg. While in Colorado a couple weeks ago, we still got a little above 15mpg going up and down steep mountain roads and loaded down most of the time.Spamcan wrote:I recently bought my '05 PF SE 4x4 (53k miles on it). I just finished my first real tank of gas that I could evaluate the mileage. Now, I know it's a heavy 4x4 and most of the driving was stop and go city road traffic. But I just got to the high 13's in mileage (13.8 MPG to be exact). I drove it VERY foot friendly (like an egg was under my foot), hardly any flooring it. My Xterra SE OffRoad (4x4) gets upwards of 16 with the same driving (35k miles on it) and should be similar in weight. I know the PF is older, but is the same engine as the X and was hoping for a similar MPG. So my question is: Since the ECU was "programmed" by the driving style of the previous owner, would resetting the ECU to learn my driving help?
If so, what's the best way to do this? And would it de-program my keys or any other pitfalls I should be aware of?
I noticed that too. Swapped out my oem filter at 20k (filthy) and wasn't impressed at all with the airbox. The speed clips are nice and handy, but most have moved to screw down boxes these days. If you just don't get the clips perfect on the engine side it does not seal well.disallow wrote:don't mean to hijack, but does anyone else have problems getting their air box to seal up properly? I find that the side closest to the engine seems warped, making it difficult to line up the tabs properly. If proper care isn't taken, I could engage the clamps and not have a proper seal between the top of the air box and the part attached to the wheel well...
Just drive like normal. I'm not sure about the Pathfinder but in my Ford Focus I have to do a brief procedure so it can relearn its idle faster. This involves idling with ac on and off, revving engine with ac on and off and cycling ac fan speeds, driving a few miles of stop and go and repeating the idling with ac. If I don't do this it will run rough for a few days before it teaches itself. It's also a little 2.0L DOHC 4 banger so the AC running zaps about 20% of my power.Spamcan wrote:Awesome, thanks deezx5.
So wondering, once up and running again, do I use the gas softly? Or gun it for a while? To get the best/optimal mileage...