L322 Range Rover misfires, replacing ignition coils and spark plugs

In this video I show you how to diagnose a cylinder missfire, and how to identify the specific cylinder; also replacing ignition coils and spark plugs.

[@meechborden2517]

THANKS FOR THE INFO BROTHER

[@CentTxLiving]

Glad to help. 👍

[@j68stone]

Excellent instructional. I have 3 and 7 misfire and a few more related codes also

[@CentTxLiving]

Thanks buddy, glad I could help. 👍

[@marktowill2828]

Was the diagnosis by sound or did you use your RSW software to detect the misfire? Thanks again for your knowledge share.

[@CentTxLiving]

Thanks for the comment. I got the check engine light and I could feel the misfire. The rsw software verified it and gave me a good starting point- plugs or coils.

[@fridder.]

thanks for the vid and the tips -- but i disagree with the dielectric grease in the coil. apparently the previous owner did this and LOADED dielectric grease in there. from my understanding, you should use it lightly around the rubber, but not anywhere within the connection between the spark plug and ignition coil. correct me if i'm wrong though

[@CentTxLiving]

You are absolutely correct, you should only use a light film. Also, remember I was living up North with a lot of snowfall and all the extreme cold weather issues. So, we had to do things a little bit differently just to keep our cars functioning.

[@keithlawson7469]

Do you have handy place to find the torque specifications for tightening the spark plugs?

[@CentTxLiving]

I always used the hand tight, then a quarter turn method. As long as you crush the aluminum washer, you should be good to go. Also, some aluminum or copper paste on the threads are a good idea in my opinion.

[@nathanmiller4591]

Do you know If the valve body on the transmission fit the 06 ford explorer and bmw. Trying to buy one used with tcu

[@CentTxLiving]

I don't think so, that's one of the Land Rover specific performance requirements I believe. Although I do use Mercon sp trans fluid. It may be that the valve body is the same but the solenoids are different. I honestly have no idea, I just replaced the solenoids, hall gasket and the tubes and my trans was good. I wish you well.

[@nathanmiller4591]

@@CentTxLiving thanks

[@keithlawson7469]

Did this permanently resolve your issue, or did the issue return?

[@CentTxLiving]

That solved it. And the other coils didn't fail either. I sold it with 204k miles and she was running great.

[@keithlawson7469]

@@CentTxLiving thanks for the quick response.y 2011 RR HSE is doing the same thing…. Misfiring, went into reduced engine mode, and has check engine light…. I am going to pull the code tomorrow…. Do you recall the code yours had?

[@CentTxLiving]

It's my pleasure. I don't recall the code, but it led me directly to the coil pack.

[@l3chuga]

Hi im on the market looking for one, what should i look first to see if its a good purchase? Thanks!

[@CentTxLiving]

Well, not to sound too generic, but a good service history is always ideal. Next will depend on what part of the world you're in; the early versions had a BMW petrol, or diesel. The diesel ones were good I hear [we don't get them 🤬]. If you in north America like me, I would look for an 07 or newer, that would give you the jag engine and terrain response. I bought mine with 115k miles on it, so a higher mileage car shouldn't be an issue - with proper service. And the air suspension should last at until about 180k miles before they need to be repaired. Other than that, get the best example you can and opt for the pre-purchase inspection just to gain some peace of mind. If you would like further details, please feel free to contact me.

[@l3chuga]

@@CentTxLiving thank you very much! Yes im in south Texas, i found one’s 2007 with 180k $4700 but i have only have BMW’s i know nothing about Land Rover

[@CentTxLiving]

With that mileage, I would pay close attention to the drive train, in particular the transmission. The zf6hp26 is a very good transmission imo, but you may need to verify the shift actuators and the hall gasket have been replaced, or it at least performs as designed for now. Mine were replaced at 150k and the trans works great. Other than that, the drive train should be checked for slop/ leaks and the usual belts, hoses and such. I hope this helps, being a shotgun blast of info and all. Lol.

[@kortneypittman2131]

I’m having a cylinder 5 misfire which one is that??

[@CentTxLiving]

First one on left side. This can easily be found on a search engine: ajv8 firing order

[@davidmoody8793]

Hi. I have a 2006 RRS 4.2 supercharger. It's also converter to LPG so it starts on petrol and then switched to LPG. I had an issue with the engine management light coming in and a loss of power (limp mode). After switching coils around it was diagnosed as having two bad coils. These were replaced however the code P0316 is reading on the diagnostics stating (engine misfire detected). Rather than pour money into this without knowing the problem would you have any help in confirming what the issue is. Your help is very much appreciated.

[@CentTxLiving]

My first guess would be to check the spark plugs, in particular the two that correspond with the bad coils. If you are near the point of requiring the spark plugs to be replaced, this could be an opportune moment to complete that task. If the spark plugs appear to be fine, that I would move on to the injectors for both the LPG and the gas (petrol). If those appear to be fine, then you would have to start diagnosing the Ignition sensors and possibly the ecu itself. I would recommend you start small with what you can easily check, and build-up from there. I hope this helps, and I wish you well with your situation. Thank you for the comment.

[@davidmoody8793]

Thank you for your speedy reply. I'll keep you posted 👍

[@CentTxLiving]

Great, I appreciate that. Cheers 🍺

[@aimpointsecurity]

Hello I hope if u can help me I have 2010 RR sports supercharged, I have check engine light on the code was engine misfire I have replaced the spark plugs but the code come back again, I feel engine lose power just one time then I restart I got full power back from engine, do u know what would be the issue.

[@CentTxLiving]

The code may be due to ignition coils. I would recommend to have the codes read with an OBDII code reader and focus your search from there. The code reader will also give you the opportunity to reset the check engine light, so if it comes on again you'll know exactly why. I hope this helps, and thanks for the comment.

[@aliceinchainz3003]

coils man.. u should have changed those to. old post i know

[@snowyshadow2136]

You never covered how to diagnose which coil was bad. I’m guessing it’s just swapping coils, but my ‘09 is driving me nuts!!!

[@CentTxLiving]

Yes, switch the coil pack to another cylinder and see if the misfire follows it to that cylinder, then you'll know if it's the coil. If the problem stays in the cylinder, then you should pull the spark plug and check it. It wouldn't be a bad idea to look in a bad cylinder with a borescope camera. My philosophy is that if one spark plug is bad, change them all, unless they have very low mileage on them.

[@josea2924]

Mine is asking me to replace spark plug 7 should i replace all of them or just number 7

[@CentTxLiving]

Switch the coil pack with another cylinder to isolate that out of the equation, then I would replace just that one unless your close to having them all changed. Also, if it is the plug and not the coil, be sure to really scrutinize why it failed just to be sure you don't have an internal problem brewing.

[@josea2924]

@@CentTxLiving ur a smart man didn't thank on doing this thanks for the quick reply and it recently started after replacing water pump?can it have anything to do with air in the system?

[@CentTxLiving]

No, besides it would eventually purge the air through the overflow. Just trying to help bud, these cars can seem overwhelming but they're actually quite simple.

[@petercolborne2216]

Which brand of coils did you use for this?

[@CentTxLiving]

I can't remember if it was Bosch or Denso. I would stick to name brand parts suppliers for these, especially considering i have only replaced one in 184k miles. Thanks for the question.

[@oSTYNCLSYo]

Is it possible to have a misfire with no engine light?

[@CentTxLiving]

Considering the fact that it's a Range Rover, yes I do believe it's possible. But it might be the spark plug or the coil, or you could have a knock sensor not doing its job.

[@oSTYNCLSYo]

@@CentTxLiving i have an 06 4.4l. I've been messing with for years now.

[@CentTxLiving]

What engine do you have, and what part of the world are you in?

[@oSTYNCLSYo]

@@CentTxLiving 4.4l jag engine US

[@CentTxLiving]

OK just asking, believe it or not a 3rd of my audiences is in the UK. If you have already changed and checked all of these spark plugs and coil packs, then it might be time to do a compression test and a leak down to find the miss. Unfortunately, if you find the miss this way that usually means you have a piston or a valve gone.