Thanks for having me. I just picked up a Disco 2 with 150k miles. Has a pretty massive oil leak from every gasket that can leak. I bought it without hearing it run to tinker with. I put a battery in it and it started after a littler persuasion. This was only after draining about 14-15 quarts of oil out of it. Yea, you read that right.

Any ways, it had a CEL so I scanned it. Multiple misfires on 5 and 6. Spark plug is sparking on No.6. Looks like it's fouled, but, it's sparking. Should ignite fuel. I think at least. Went ahead and did a compression test on that cylinder. It got 150psi. Seems okay. I haven't checked 5 yet, but, I'm guessing it'll fire.

Any ideas? I already know I have to tear this down on top and bottom to reseal the motor. But, id like to drive it before. Make sure engine is healthy.

I discovered the coil packs are in the worst possible spot. Awesome. Wondering if 5 and 6 are switched and that's why it's misfiring. Hard to tell without a bunch of work. Looks like they are right across from each other on a wiring diagram.

General thoughts? It doesn't appear to have any knocks. So, that's good. Maybe fuel injector is dirty? It sat for 2 years.

Again, thanks for having me and thanks in advance. I can't wait to get this toy running strong. I have plans for this baby.

 

 

Ill have compression test for all 8 if youll work on the engine in time. But with your misfire, it could be just a full tune up including coils since you have not run it for a while. A better gas will do as well and add seafoam.

 

I definitely plan to do a tuneup. I'll be ordering plugs and wires soon. But, I planned to do the install when I did the valve cover Gaskets. For now, I just want it to run. Since the spark plug is sparking, I figured wires and coil pack is fine.

I'll do a compression test on all cylinders tomorrow.

 

Yah, that will run as long as you keep an eye on a blinking SES. That could lead to cats failure. It get more expensive from there. Sure you can start with the plugs. Look at the wires in total darkness if its arching.

 

I only need it to run well enough to drive a little and test out transmission and transfer case.

 

I'd be thinking about *why* it was overfilled with double the maximum amount of oil!

Scenario 1 of many: transmission or transfer case was drained instead of the oil being drained at an oil change shop, so your transfer case is empty and then they added 7 quarts of new oil to the motor.

Scenario 2 of many: shadetree mechanics will overfill the entire motor, including the pistons/cylinders, to break free a seized motor (with a cheater bar).

Scenario 3 = ?!

 

Next, I'd be swapping good spark plugs from #1/2 with your #5/6's to see if your misfire moves or not...anyway gives you free information.

Based on that, you might swap coil pack locations. Still doesn't cost you anything in parts.


Then I'd swap fuel injectors for the same reason. Do any of your misfires move.


Can you smell exhaust in your coolant expansion tank? Are your coolant hoses rock hard with the motor off and cooling down?

Is your old oil milky? Is your new oil milky?

Are you losing coolant?

What are your fluid levels in your transmission, transfer case, front axle, and rear axle (differential)?

 

Im pretty sure the guy was just a retard. It had a massive oil leak and he didn't check the oil. Just added it constantly.

 

Misfire is gone. Cleared codes, drove it for 5 minutes, not back yet.

Doesn't smell like exhaust. They feel normal.

No. Both the old and new are good.

Too early to tell. I will do a pressure test at some point. No overheating on the short drive.

That is secondary to the motor. I'll check and replace all fluids later.