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Land Rover Repair/Land Rover 2005 LR3 v6 4.0L


I have a 2005 LR3 v6 4.0L which throttle hunts in 5th gear
(between 1500- 1800 rpm) between 30 to 40 mph.  Tach fluctuates 300 to 500 rpm.  I have no engine codes recorded in the ECU. Vehicle otherwise run great but surges when at city cruising speeds.
MAF, EGR and cam sensors have been replaced along the the throttle thoroughly cleaned
Would you have any suggestions.  I have had it to the dealer and they have no answers.
Any help would be greatly appreciated.

The best way to solve a problem like yours is to look at the live data on a scan tool while you are driving.  Anything else is just pure guessing, which gets expensive fast.  I think you need to find a shop who is qualified to fix it, and who has the tools, and who will put in the time to get to the bottom of it.  

The dealer "having no answers" either means they don't have those skills, or you did not get them to put the necessary diagnostic time in,

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John Elder Robison


I own J E Robison Service in Springfield, MA. We are Bosch Car Service for Land Rover, BMW, Mercedes, and other European lines. I can answer most questions about Land Rover service or repair. I'm known as a car enthusiast, machine aficianado, photographer, writer, and speaker. I've been around Land Rovers and British cars most of my life. Visit me at my car business, or my author website, Check out my autism and writing blog at or my photos on John Elder Robison


I have been a Land Rover service manager since Land Rover returned to North America in 1987. My company is a four-star Bosch Car Service facility, known nationwide for Land Rover service, overhaul, customization, and restoration. In addition to Land Rover our company services BMW, Jaguar, Mercedes-Benz, Rolls_Royce, and Bentley motorcars. We have factory-plus-level service capability for all makes. Visit my company online at > service > land rover Also visit my blog at


In the Land Rover world, my writing can be found in various print magazines and online at robisonservice.blogspot,com. In the wider publishing world, my work is published by 20 publishers in over 50 countries. Mt books Look Me in the Eye, Be Different and Raising Cubby have made US and international bestseller lists.

I am ASE certified, Bosch Trained, and trained by Omnitec/T4 and Autologic on their Land Rover test systems.

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