No she'll do a miss when I first start it kind of a light thump...thump thump... So far from what I've been able to find is some are saying it may be a weak spray pattern from the injectors but I'm hesitant because a set of injectors is close to 200 bucks, and it would really suck to replace em and find it still does it. The only thing i have going is: no codes, full tune up, good fuel pressure, and the MAP, IAC, TPS, O2, and ETC all seem to be in spec or atleast working (to some degree), timing is dead on, valves adjusted, new egr, and TBI cleaned up (inside and out). I also heard some say that old coolant can have a negative charge and effect sensors that come in contact with the coolant, one mechanic saying that even a -.25 voltage in the coolant will cause wierd things to happen to sensors... but that sounds far out. I dunno, I'm use to working on small block and big block chevy's with HEI and a tuned Q-jet, thesed computer jobs got me.