since you are very familiar with dsm's and you have had more than one.
have you ever experienced pknock? phantom knock that comes and goes? im reading all the boards online to try to fix this shit.
im hating life cause my car is retarding the timing so much for no apparent reason. im thinking of changing the o2 sensor, knock sensor and lifters just to take all that shit out of the equation.i hear carbon buildup is the culprit sometimes too. it sucks to be ready to go and get smoked by a ford focus sometimes. hehe.
my big 16g should be pulling me past many things.