misfires!!!!!!
 

They don't go away. 5,6, and 8. New plugs, wires, coils are good. where do i go from here? This has been a recurring pain in the @ss and I can't seem to find a solution. :confused:
2002 DII SE 90k miles.

How new are the new plugs? What brand and size? If they aren't magnacore 8mm, it could be your problem.



Also could be like me and have a stuck open valve, but I doubt it

What plugs and wires did you use?
How long ago was the tune up done?

I had the same problem last month. I replaced my two front 02 sensors and problem is fixed.

what plugs and wires?

Bosch platinum +4's and spark transfer international wires. Tune up was done about 1600 miles ago.

i never even heard of those wires... what did they cost what size are they? i suggest you spend $80 and get the magnecor 8mm wires.

spark who???

The shop that replaced my head gaskets, which also seem to be going bad installed those wires at the same time 1600 miles ago. I guess you have to do everything yourself if you want it done right. The shop charged me $74.99 for them. Don't know what size they are.

sounds like yhey took you hard

That's what I was thinking until I reversed the charges on my credit card. :D

yeah i would bring the truck back and say thanks for this crap wires my truck is not running properly because of this overpriced doo doo you put in.

I would never say thank you to anyone who put doo doo in my truck.

just get the 8mm magnecors and put them in and see if you are still getting misfire codes.

i'll give it a shot.

Thats STI guys, da.
Those are decent wires.

Spike I was about to say that when my computer took a dump. Now that I am back on, he has also had coolant vanishing which could be a the reason for the misfires. It wouldn't matter which wires that you have if coolant is getting into the cylinders. I have known many indy shops that swear by STI's and I have also used them for over a year with no problems. The only reason I switched to Magnecores was this website and that I had to do my headgaskets. I think that your problem is bigger than the plugs and wires. Did you ever figure out where the coolant is going? Start with one problem, fix it and then move on.

all this doody talk makes me smile

I have not figured out where the coolant is going. I haven't had my truck for a few days so I can't look at it right now to check the cylinders. I'm really hoping it's not the head gaskets, but how else would coolant get into the cylinders? This coolant mystery has been a big problem for me... I thought the misfires were unrelated but it is probably the root of all the problems I've been having. The shop I had install the head gaskets thought that would fix the problem, it didn't. They thought my cylinder head was the problem on the passenger side, it wasn't. I'm completely lost. Is someone popping my hood at night, unscrewing my plugs and filling my cylinders with coolant as some kind of sick joke? I've only owned this disco for about 4,500 miles and more than half of them have been spent dealing with this crap. Bad first impression. I hope I can figure this out soon before I end up taking my disco on a kamikaze mission off a cliff.

that would be a first, please take pics and video for the rest of us...

i feel your pain i had gotten my truck cheap but it needed every gasket from headlights to tail lights replaced. It is very possible that the head gaskets need to be done as you said they were done at 20k and you don't know who did them or what kit was used. You can get the kit from Atlantic British for $150 and do the work yourself it will save you some serious coin and give you peace at night.

Personally I think most on this forum put way too much emphasis on plugs/wires brand. But that is just my opinion. I'm sure they will bust my chops. The disco did not come out with magnecor wires when it was stock and it ran just fine. Basic plugs/wires if in good shape should not cause misfires. They may not perform as well as mags or bosch plats but at least they should not cause misfires.
Your issue is not plugs and wires unless you have them out of sequence. You need to figure out where your losing coolant and verify cylinder pressure.

Ask your shop to perform a coolant pressure test and also compression tests on each cylinder. Were the heads machined/resurfaced when the head job was done? If this is a good shop they should already be doing this for you instead of you trying to figure it out.

Any codes?

i have P0308, P0306, P0305 (the shop i just took it to added this one), P0447, and P1300.

What was the final outcome?

The final outcome is that nothing was solved and I still have all these problems. I haven't driven the rover in 2 months because I can't get it registered with all these codes in the system. Plus it will probably catch on fire if I continue to drive it.

have you had it pressure tested? are you losing pressure in any of the cylinders? you need to have it checked to figure out where the problem is.

So you have misfires on 5, 6 and 8. If you are sure your wires and plugs are good then get a used set of coils and see if that is your problem. P1300 is a generic misfire code and P0447 is a Canister Vent Solenoid (CVS) Unit code, replace it.

First I would have to get in the thing to be able to actually do any work on it. Since some genius engineer designed the vehicle with only one key hole which is prone to breaking I cannot get inside with my battery dead. Disco mike told me to try jumping it at the positive lead from the starter but that did not work either. So now I either have to break a window or pull the hood release cable somehow.

if you can get into the truck simply pulling the plugs will tell you a lot, any plugs that have a very clean or rusty electrode will be an indication of coolant being ingested in the cylinder.
My guess is a cracked cylinder or two but pull the plugs first and see what they say.
It could also be a cracked head. Was the engine ever overheated?

yes. it was overheated a few times.

Bahh Dum Dum............... might be time for a new engine.
Pull the plugs first

I finally found the problem. The worst possible situation has occured. I have 2.5 dropped sleeves. Time for a new engine unfortunately. I only owned this thing for 2500 miles before this happened. Not fun!

Well as you have found out you cannot let a all aluminum engine overheat.
Sorry about your luck.