Hello All, I recently changed the spark plugs on my 2000 Discovery. I used the Bosch 4 brand. After I changed all 8 of them, I took the car out for a test ride and am now getting a chopping sound from one of the spark plugs. It sounds like a 1975 cadillac with a bad muffler going down the street. The sound gets louder as you accelerate. I listened to the engine and narrowed down one of the two front spark plugs on the driver's side where the sound is coming from. Anyone have any ideas ? Comments ? Suggestions ? Also, I wanted to change the spark plug wires but noticed that all 8 of them go from the side of the engine to the rear. Anyone have any suggestions as to how to get to the rear end of the wire ? Thanks.

 

Sounds like you have a loose spark plug or two.
Just retorque the plugs.
As for the plug wires I will let a Disco II owner help with that.

 

got a set of long needle nose pliers or remove upper intake manifold