hey guys, I just got a leak in my transmission fixed and I had the mechanic change my spark plugs as well and I brought home the old ones and they are really gross. they all are black, but one of them has liquidy sludge all down inside (this is a trailing plug), I don't have any noticeable power loss, and I am not burning any oil (besides the 2 cycle, see below) and I don't have any codes. I am stumped and I don't want this to happen again, any help would be amazing and thank you guys in advance

I have an AEM CAI, sohn with lucas semi synthetic two cycle, BHR coils and I use full synthetic and I am at 60k miles on a 2004

trailing plug


all plugs

 

How many miles did the plugs have on them?

As well as the cools and plug wires?

 

the plugs have been in since I bought the car so 20k+ and the coils and plugs have been in for 15k miles ( I checked the plugs when I installed the coils and wires and they were good )

 

i would check spark on all 4 coils, timing light or HEI checker work well for this

 

now you know what 20k miles does to your plugs :P

 

and what if the coils are good and the spark is strong? as I said in the first post I have only had these coils for 15k miles and I have never flooded the engine

 

You said you're NOT experiencing any oil consumption? That's a problem.

 

You said you could read

Looks like 40K worth of worn plugs, not seeing what the fuss is about

 

I do the same thing with magazines, I skip all the silly words and look at the pictures.

 

I'm not alone!

 

so you are saying this is normal at the end of the life of a spark plug?

 

40K while burning 2 stroke darker color is to be expected.

 

if the coils are good then you have no problem. however 15k you could have one or two bad coils, the car runs fine on two coils...

 

Those plugs look horrible. I've changed mine twice, once at 20-25k and again at 44k and the second time I had been premixing every single tank and they looked the same as the first set I changed out(first set had no premix that I'm aware of, previous owner). Both sets were a nice gray color with a bit of speckled black here and there but not even 10% of what these are.

 

What type of driving do you do? Short trips?