How’s it going peeps, new to the Land Rover forums but long time reader and appreciate all the help everyone has gave me by the information posted. I recently purchased a 05 LR3 and love it but has some stuff that needs to be done as far as maintenance. Recently started having rpm issues where it would fluctuate up to 750 and as low as 400 roughly and pin pointed it to the coil capacitor on top of the engine. Now unfortunately Land Rover discontinued the part LR004160 and cannot find one anywhere online or any dealers. Smh. Anyone have any idea where I could source one or even find a used one? All help is appreciated, just want to fix this issue asap

 

I could be wrong, but I bet the transmission capacitor will work in its place. The connectors are different, hence one reason to be different part numbers.

 

I wonder if someone smarter than me could check the capacitance of these capacitors and we could just source a non vehicle specific capacitor and wire it in.

 

I thought about it but it being electrical I really didnt want too mess around too much with it and possibly fry something.

 

Someone on another thread mentioned calling Ford and getting one from them, but my thing is they are only 1 wire capacitors and didn’t want to do further damage and possibly make the issue worse.

 

If you want to replace it, a junkyard is a good bet.

There's also apparently a way to bypass the capacitor, see: https://landroverforums.com/forum/lr...e4/#post321908 The side effect could be static on the radio, so a.) not a big deal and b.) good way to test your theory about it being the capacitor. Jump the indicated wires and see if it resolves the idle.

Speaking of that...the symptoms you mention can also be caused by a dirty throttle body and maybe some other stuff like unmetered air getting in through a leak somewhere. The dirty TB is pretty common--have you looked into that? Do you want to share the process that led you to suspect the capacitor? In my admittedly limited experience (but a lot of reading) with the LR3, I have run across a lot of talk about the capacitor on the top of the engine, but there's a lot of discussion about replacing it proactively and not a lot of talk about it actually failing. Just throwing it out there that you may want to ask the hive mind if you're not 100% sure.

 

I was looking for LR004160 as well and found that LR025249 might work... when searching I came across this: https://www.ribblevalley4x4.com/allm..._LR025249.html that had LR025249 as a related part. Looking up LR025249 shows it's for the LR4 and LR3.

I haven't bought it yet as I may do the junkyard option first.

 

Thank you so much for that link. I will definitely be trying that out this week and see how that runs after. I am not 100% sure that the capacitor is “bad” but I figured since I had the first design that would be my next item to replace. I have cleaned the maf sensor and checked for possible vacuum leaks but have had no luck in fixing my issue. I also get the intermittent message of Reduced Engine Performance but that rarely comes up. I have tried junkyards but cant seem to find any near my area or maybe not looking in the right junkyard.

 

That is very interesting and might consider getting that part if I find that capacitor is issue after jumping the wires first. The connector seems to be the same as well as the wire pins look to be in the same location. Thanks for the info!

 

If you haven't inspected and/or cleaned the throttle body yet, that would be my next step. See or any number of other TB cleaning vides, I just happen to like this guy. This particular video doesn't go into great detail on the actual cleaning but once you're staring down the barrel of it, gently open the "butterfly" and use a solvent (such as throttle body cleaner) to clean the plate on both sides, the edge/circumference of the plate, and the barrel where the plate closes on it. You can get down the barrel too, but just don't scratch it with a tool--use a clean rag or paper towels. If it's chunky, that's a good indicator it's letting in extra air and could be causing your issues. Take your time, use a toothbrush, wipe it all out.

If you go slow, it will take an hour and cost $10 if you use name brand TB cleaner. And it's well worth it even if it doesn't solve your problem.