Engine revs high upon start up

[David Shimmel]

My (new to me) 2012 LR4 LUX revs past 2K rpm on the first start of the day. Foot is off the gas pedal. It settles down to around 800 RPM within 15 seconds. It still revs high when starting after it is warmed up, just not as high or for as long. The vehicle has 133K miles, good maintenance including timing chain guides and tensioners replaced. It runs smoothly and their are no other known issues. Does anyone else experience this?

 

[scott schmerge]

My (new to me) 2012 LR4 LUX revs past 2K rpm on the first start of the day. Foot is off the gas pedal. It settles down to around 800 RPM within 15 seconds. It still revs high when starting after it is warmed up, just not as high or for as long. The vehicle has 133K miles, good maintenance including timing chain guides and tensioners replaced. It runs smoothly and their are no other known issues. Does anyone else experience this?

I do. Mine has been revving slightly higher recently (about the same as yours) but it quiets down after about 3-5 seconds. I have 125 on the clock. I was thinking it is likely time for injectors (got the truck at 115k and the PO didn’t do injectors as far as I know).

I’d be interested if anyone knows the cause as well.

 

[TrinidadLR4]

Mine does this too, every now and then. Idles at about 1500-1600 for a few seconds, before settling down. No rhyme or reason for it, and it runs fine otherwise. I am thinking it might be an emissions-related cycle of some kind.

 

[Fuji4]

Vacuum Leak, probably, if it goes that high. I have the same thing at the moment, replaced a damaged hose, and now am looking at the valve cover to remedy the situation. Mine goes up to 2k or so, won't let me shift out of park until it drops, then it drops down to normal idle after maybe 15 seconds. then sometimes does not do it if warm. Mine threw a vacuum leak code though, and there is a slight hissing under the hood.

 

[Cthehentz]

I think this is normal, my 2011 does the same thing around 1500rpm and has done this since day one.

 

[catman]

It is not uncommon to have a "high idle" at startup, but if there is any excessively high rpms or surging of any sort, a throttle body cleaning may help solve that issue. Our 08 RR had high and erratic startup idling (idle would lower and then raise up again) and cleaning the throttle body solved it. But it still starts out at 1500-2000rpms on cold statup a lot of the time - which is normal.

https://www.landroverworld.org/threads/throttle-body-on-5-litre-lr4.25949/

 

[ktm525]

Normal. Warming up the catalytics.

 

[Fuji4]

Normal might be 2k rpm or less. Mine surges up for the same period of time too high for normal.

 

[Cthehentz]

That's high, I would start checking for vacuum leaks.

 

[jlach993]

Certainly that is not normal my friend. Check it out and let us know buddy.