Goto harbor freight, for something like 5.99 they sell a little plug for spark plug wires that tells you if they are bad.

I had this very same problem few months ago, the thread is here, and the fuel injectors fixed it.

Remember, our Rover doesn't have a fuel filter.

 

Thank you guys!

Disco oh no: I don't have a test light but I'll get one today
Army rover: I did break the valve cover breather plug on the intake, and I was going to fix that after I figure out the misfires. I've been holding it up to the intake to see if it smooths out the idle and it does not.

So today I'm going to rent a compression checker, and go to harbor freight for that tool.

After I check compression I'm going to take the manifold back off and check the power at the harness plugs into the coil. I read someone had a similar issue because they had a bad ignition switch and the computer would cut power to the coils long enough to create a misfire...I do have ignition switch issues.

Anyone have a good way to check the injectors?

 

No compression cyl 5 even after I put oil in it.
done with a cold engine. 3-5 compression strokes each time

Do I have to do it with the engine warm because damn, I'll burn the hell out of my hands. Also I don't remember if I held the throttle open.

cyl 2 = 145
cyl4 =110
cyl 6 = 125
cyl 8 = 120

cyl 1 = 115
cyl 3 = 120
cyl 5 = 0
cyl 7 = 120

 

opinions?

 

If you don't have any compression at all on cylinder five, even after adding oil, it could have a valve stuck open. Or a hole in the piston or broken rings.

 

I think stuck valve cause I've got loud top end noises. I've got a LR tech coming over next Saturday to do a leak down test

 

well the exhaust valve on cyl 5 is stuck in the down position. So now I'm taking the heads off. I got it to the point to where I'm doing the head bolts, and yep...pain in the *** 1st one is stuck...I have a 2 foot Matco breaker that hasn't worked so I'm off to Home Depot for some pipe and I'm gonna make it in to a 4 foot breaker. And buy an impact socket as my sockets are craftsman, but my wrenches are Matco

 

So the valve spring broke! What would cause that?!

 

Update! The heads are off. 218k and no coolant leaks! <br/>Crosshatch is on the liners, all Pistons make full sweep, no edge on the liners. So now the heads are otw to the machine shop

 

hey i just posted a video of how to get to the coil pack out on my disco2 while i was changing the spark plug wires. It maybe of some help to you guys check it out.