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2006-2009 Range Rover Sport
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2006 RRS Supercharged....97000 miles.

I want to have the fuel injectors removed and cleaned ultrasonically as I am getting P0307 and P0306 misfires. The spark plugs have been changed and I still get the cords. My Indy shop does the work and they are usually pretty good about the pricing. Today I was told that it will take about 8 hours to remove and place the injectors back in because they have to removed the intake to get to the injectors. That does not sound reasonable to me.

Can anyone clue me in as to how long it does take to remove the injectors or to gain access to them. Thank you very much in advance.
 

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27,805 Posts
Since you have the 4.2SC they are indeed accurate. The injectors are located under each intercooler. The SC, intake and intercoolers must be removed for basic access to the fuel rail for removal, then the removal of the individual injectors. For details, drawing and to see what is involved, download the 2007-2009 workshop manual. The 4.2 engines are the same. You will find the details under fuel charging and controls for 4.2 SC

https://drive.google.com/file/d/0B5a...RBcXZyY00/view
 

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2006-2009 Range Rover Sport
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418 Posts
Why not try a professional cleaner attached to the intake first ? See if that fixes the problem. Sounds better than an 8 hour job.
 

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The op has made a request of his trusted shop. They are providing the cost to complete what he has requested. Intake fogging products do not go THROUGH the injectors, thus only clean the exposed tips impacted by the air entering the cylinders. They do great job of cleaning the intake and cylinder but not the mechanics of aging injectors. Tank additives clean the entire fuel chain inclusive of fuel path within the injectors. However they have limited cleaning due to dilution.
 

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2013-2015 Range Rover Sport
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480 Posts
Still, maybe a can of BG 44K just to see if that works. Maybe clean the coils as well on cylinder 6 and 7 . . lots of money involved in pulling the parts . . .

Maybe check for pinched wires going to those coils, as well. Been five years since I worked on my 08 4.2SC, but seem to remember the loom runs together for those cylinders.

But, might as well refresh the hoses while the parts are up and out of the way, if you go that route.
 
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