my plugs in the cylinders 1,4 are nice and brown (perfect heat range) and my plugs in cylinders 2,3 are really black and sort of smell like gas..

i've been through a few sets of plugs.. and i'm starting to get ticked off.. i just had a shop rebuild my dizzy..

anyways.. if there was something wrong with my dizzy, wouldn't ALL of my cylinders be firing bad? not just cylinders 2,3?..


i've got brand new ngk wires, msd cap, rotor and blaster coil.

 

k well if youve changed the dizzy and plugs id rule them out. check your timing? idk take it to aamco have them do one of those free diagnostic test for you

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sjbmx &raquo;</TD></TR><TR><TD CLASS="quote">k well if youve changed the dizzy and plugs id rule them out. check your timing? idk take it to aamco have them do one of those free diagnostic test for you</TD></TR></TABLE>

the motor is fully built and tuned, i had stock cams in it before (tuned) did the same thing..

put new cams in, repaired the dizzy a little and tuned it.. still does it

 

its not the spark then, and you said it smelled like gas so its not that. do a compression and leakdown test. what do you have in it? idk if its possible but maybe it really rich in those two cylinders. this is pure speculation as ive never had this problem but i think some tests could speak volumes

 

i'm thinkin it's the ICM. my rpm needle does the mexican hat dance every so often

 

i replaced the ICM.. no sign of misfire YET but my tach still does the mexican hat dance when i hit 2 step or rev limit..