i have a innovative lm-1 that i recalibrated before run, my a/f is at about 12.3:1-13.5:1. im useing ngk bkr6e-11 setup in signature. when i got done i took out the plugs to see if there were signs of detonation and i found 3 plugs were pretty white(looks lean) and 1 (number 3 cylinder) looked good. i thought that b18's usually ran lean on 3 not rich. last season same engine all 4 plugs looked good. btw i only used the plugs for 60-70 miles and the steel around the porcelin (inside the cavity) has black carbon deposit. maybe plugs havent changed color yet? maybe because i have ngk 6's in and not ngk 7's? idle is 14.5:1 and i let it idle for like 1 min tops b4 i shut it down.

 

Put in a fresh set of plugs, make a wot run, shot down at the top of the run, then examin them.

 

u mean the plugs will color in like 1 pull? what do u think the chances are that the o2 is reading wrong. the sensor is like 8-9 months old.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dbiker207 &raquo;</TD></TR><TR><TD CLASS="quote">u mean the plugs will color in like 1 pull? what do u think the chances are that the o2 is reading wrong. the sensor is like 8-9 months old.</TD></TR></TABLE>

I doubt the wideband is wrong.
Just do what I told you to get a good plug reading from cylinder to cylinder.
Complete a compression/leakdown test to ensure all cylinders are close.

 

thanks for the help i will try it tomorrow. i did a compression test and my numbers were cyl. 4: 286psi, cyl. 3: 280psi, cyl. 2: 280psi, cyl. 1: 280psi

 

thats awsome CR result.

 

any pictures??

 

pics of what