This video is pretty good. How I figured it out.

 

Where did you insert the tube, in the expansion tank or at one of the hose inlets to the radiator?

 

In the expansion tank, where the cap would go. Make sure to get it to seal in there good and make sure the coolant isn't too high to come up in the tube. Hot coolant = no fun.

 

excellent video. he actually seemed to have a clue.

 

Operating/diagnostic instructions.

Block Testerâ„¢ Instructions - How to use your Block Testerâ„¢
......

 

I was able to perform the block test earlier today. Made sure to follow all of the directions given and I'm happy to say it appears my HG is safe! (for now). Thanks again for the suggestion and video links everyone. Here are videos of doing the test:

Cold: https://photos.app.goo.gl/zZByYaDXSoaQaLtC2
Running Temp: https://photos.app.goo.gl/bewhj7HOFk8aqHoo1 (Sorry for ringtone)


However, when I started the truck up my Ultraguage presented me with a couple new codes that must have been pending from when I got back from my trip:

P1300
P0301
P0303
P0305
P0307

So my entire RH bank is recorded misfiring. Given the block test is a pass, and I have yet to do the compression test, is it safe to assume that is could be a bad valve cover gasket or injectors or are we back on coil pack/plugs?

As for the P1300 code, would all these misfires cause the code? I do have a slight exhaust leak at the mid-pipe collar. Since I was romping around in some mud puddles over the weekend, I figure there some water entered the exhaust but not sure if that would throw the code.

Suggestions for next steps?

 

May have just found my next steps. I may need to start looking at the cats and o2 plugs while checking the valve cover gasket and coil pack:
https://landroverforums.com/forum/di...rs-side-61484/

 

That's great to hear. I would skip the compression test. Since the misfires are on 4 cylinders, I think this might be back on coils / plugs or something else. I don't think valve cover gaskets are behind this.

P01300 is just a multiple misfire code. It'll go away when you fix the other problems -- at least it did for me.

You can also use the Ultraguage to check the O2 sensors readings. That might give you a better idea if the Cat on the LH bank is working.

 

Today I dug a little further into the engine and removed the upper intake manifold and the coil pack/wires/plugs.

As soon as I took off the plenum I was greeted by a wonderfully gunked up cylinder 1, while the rest of the cylinders on the RH side seemed to be better the further back. Everything on the LH side seems good.

Took the plugs out and same type of condition was noted - Plug #1 looks quite dirty while 3/5/7 look better.

So my question moving ahead is what would cause the amount of sludge in the cylinder and how does this help me get closer to understanding the misfire on #1/3/5/7?

 

Since you've been digging up old threads I had to find yours to maybe lend a hand. I'm no mechanic but I chased a misfire for quite a while.

The sludge coming into the intake is from the PCV system. On the passenger side valve cover there is a hose to the intake manifold. Inside the metal outlet on the cover is an oil separator. That is supposed to help keep the oil residue from entering into the intake. While chasing mine I replaced my oil separator and cleaned the valve covers thoroughly.

Also, per the RAVE the ignition coils operate on a wasted spark system. The coils fire in pairs so that it fires in one cylinder during the ignition sequence, and also fires at the same time the other cylinder in the exhaust stroke. In other words if you actually have a bad coil it would be affecting two cylinders at the same time. They are paired:
1 & 6
8 & 5
4 & 7
3 & 2

Now that isn't to say you couldn't have a bad lead on a coil only affecting one of them, but it's just something to keep in mind.

I chased my misfire for ages. I replaced just about everything, coils, wires, plugs, fuel injectors, front 02 sensors. I still couldn't shake it. For me, it turned out to be mechanical and didn't clear up until I removed the valve covers, removed the rockers assemblies and thoroughly cleaned them. That may not be the case for you, just my experience.