I have a 2003 disco. Service engine soon light flashes and I loose power under a passing gear load around 65-70 mph. My code reader reads a cyl 6 misfire. It has brand new heads and a new coil pack. The land rover "professional" thought this would fix it. It is exactly the same as before I had it fixed -$4700. Any help would be much appreciated.
Thanks

 

You spent $4700 without getting a 2nd and 3rd opinion?

"Dr. my arm hurts"
"Ok, lets cut it off"
"Ok"

Did he do a tune up? New plugs and wires, what brand of wires did he use?
Are you losing coolant?

 

Im in the navy, left it at my parent's house 400 miles away, and for my birthday they were going to surprise me and have it fixed. I went a little pale when I found out. A little help here.

 

I have no idea weather he did wires or not. Not loosing coolant. With the coil pack and heads I supposed he had to do some tuning.

 

Thank you mom and dad. lol

I too would assume he did plugs and wires but you know what happens when you ASSume.
Swap plug #6 with a different one and see if the misfire follows.
#6 is the 2nd to the last on the right side of the engine (from sitting inside the truck)

 

Plug wires are new

 

Plugs and wires are new

 

Ok, swap plug #6 with a different one and see if the misfire follows.
Do you know what brand of plug wires he used?

 

The invoice doesn't say what plug wires he used. The plug wires don't have what brand they are on them.

 

Also. When I got the cyl 6 misfire (before any work was done) I changed all of the plugs. It didn't solve the problem. Same cyl6 misfire as before. The "professional" also replaced the plugs, still cyl 6 misfire.