sorry if this is a stupid question. I just got my 2025 P400 D90. I have never had a land rover before. When I start the car first thing in the morning the engine revs pretty high for maybe 30 seconds. Its not cold here, I am in arizona. It then kicks down to normal. this morning though I tried to go in reverse while it was still reving and it tried to take off on me so I had to hit the brakes. Is this just a normal thing that I need to wait for the engine to go through its thing before taking off?

 

Im am pretty sure the car will not let you put it in reverse unless your foot is on the brake. If you then take your foot off the brake after the reverse gear is selected then yes it will then move in the reverse direction. Speed in reverse will be in relation to RPM of said vehicle. Maybe just let the brake off slower? All of this sounds normal to me.

 

The high idle is normal on a cold start. You can put it in gear when it is at high idle, but it is best to let the engine settle down before you put it in gear and take off. I have set off when the engine was idling high, and I never had anything like you explained happen to me.

 

In addition to the high (loud) idle, the engine will also have a ticking sound as the injectors wake up.

 

The ambient temperature has nothing to do with the high idle. Have owned mine for three years in Southern Florida and it starts with a high idle every time, whether it’s 62 degrees or 92 degrees. And unlike some vehicles, there is no idle/choke/temperature correlation. The vehicle’s software is designed this way,
perhaps due to the electrical demands; even during periods when the vehicle is not used, there are many ‘vampire’ current draws as the vehicle is communicating with mobile signals, searching for Wi-fi, software updates, looking to communicate with a key fob nearby, (which is why it is recommended to not leave your fob in the car or nearby, or to use a Faraday box or pouch). And the high voltage battery used in the MHEV engine consumes, and requires lots of power. I’m no electrical engineer, but this is my best guess, and understanding, from what I’ve read so far. Regardless, it is not a best practice to put a vehicle into a drive gear while the engine revolutions are elevated. It kicks down in a very short interval.

 

thank you

 

High idle is to heat up the cats before driving.

 

Actually like the ‘roar’ upon starting. It feels like you’re awakening the beast. First few times in early ownership it was a bit startling, but now that I’m used to it, I’ve grown accustomed to its wake up purr.

 

Steve, I'd agree -- it's a little "herky jerky" in the mornings when putting it in reverse and the high idle (emissions thing) is doing its thing. It did annoy me when I first got the vehicle but a few years later it does not bother me. It has something to do with the high idle combined with the brake hold assist (which you have to lightly press the gas to overcome) I think. SO then when you first take off it jerks backward or forward then you slam the brake to overcompensate. I've almost hit my garage door.

I usually just wait for the high idle to die down before moving the car. I'll futz with my phone or the car controls or something to fill the gap.

 

I use the time for the idle to settle down to perform the litany of screen taps to disable Emergency Braking, Emergency Lane Keeping, and Auto Start/Stop. Something like 9 or 10 screen taps. Still wish an update would allow one to customize a Shortcut performing all those functions into a single tap.
Settings>All>Vehicle>Driver assistance>Collision avoidance>Disable Emergency Braking>Yes>Disable Emergency Lane Keeping>Yes>Home, then turn off Auto Start/Stop. Gets old after awhile, but by then the idle has usually dropped.