Disco shudder

[discoskc]

Hi all!

I changed the spark plugs, wires, distributor cap and rotor on my 95 Disco yesterday.

After I changed them, when I started the Disco, it started fine and ran fine, but it shuddered a bit. It shuddered more if whenever I pressed on the gas. When I first started, it felt like the whole engine was rocking. But then it settled down. The idles are fine.

Does this mean that some cylinder(s) is not firing? How can I check and correct?

I have put in Bosch Platinum 4+s, Magnacore wires and genuine cap and rotor.

Appreciate all the input.

SKC
--------------
95 Disco
68K miles

 

[discomike]

It is possible you passed a little carbon, how is it running now, did you get any check engine light?
Mike J.

 

[discoskc]

No check engine lights. No other symptoms other than it seems like I have more power.

My old plugs were all black. Some of the plugs were wet around the threading, but not on the tips.

I was afraid that maybe I put in plugs that did not match what the engine needed. Could it have been that the Platinum 4+s are longer or something ( I did not check the length from what I had previously which was Champions)? Could longer plugs be detrimental to the engine?

SKC.

 

[tcosson]

Longer plugs could potentially get hit by the pistons... I hope not for you.

 

[discomike]

Do you remember what plug number was on the side of the plugs, I'll match it up to one of mine to make sure you have the right one.
Mike J.

 

[discoskc]

4478 is the model number for the plugs, if I remember it correctly.

 

[discoskc]

tcosson, now you are scaring me. If that was the case, how much trouble am I in? I am a pessimist, so thinking about the worse case scenario.

 

[discomike]

Don't worry about the length, you wouls hear a constant tapping and extremely rough running engine due to destroyed plugs. I'll check in the morning for the plug number, I know that was not the number from the side of my spark plugs, did you number come from the box or off the plug?
Mike J.

 

[tcosson]

Yes, if it hit the pistons you'd know right away... I didn't read you post close enough. Sorry for the scare.

 

[discoskc]

Mike,

That number was off the box. I came home very late tonite, so could not remove one of the plugs to give you the number off the plugs themselves.

SKC