spark plugs uneven

[pballer]

My problem is that I had to tune my car rich to rid knock and when I pulled my plugs, 1,3 and 4 cylinders are black (like i said, had to tune out knock) but one cylinder (#2) was perfect tan colour, plugs are bpr7es mods in profile are up to date, sorry i cant post a pic because i don't have a digi-cam. just pretend 3 very black and one tan. compression is even 140 across. known small boost leak at t.b. Is it a possible vac leak @ injector seal? bent or burned valve? Injectors are only ~3 months old. (my engine is comeing apart soon anyways) Expert tuners please enlighten me.

 

[95blackGsTurbo]

Until you fix your boost leak and do a boost leak test, looking at your plugs won't tell you anything until you get the system sealed properly. What are the plugs gapped too?

 

[pballer]

all gapped at .028", but if the leak is at the throttlebody, then it would affect all cylinders. I'm looking for someone who has had this problem, not a guess. I tried searching alot. Thank you

 

[pballer]

when i did a boost leak test a short time ago, the injector seals were not leaking, only throttle body. My car is apart now so, I cannot do a boost leak test.