Yes, willwren. I guess I wasn't too clear. I ended up buying a new injector for $75 (GP Sorensen @ Autozone) and got the official o-ring kit from my dealer. I replaced the o-rings on the new injector w/ ones from the kit as well as all o-rings on the other 5 injectors. They seemed like a slightly new spec as they were blue and looked a tad bit thicker. It kinda scared me how well everything went back together without a hitch.
I took the car out this morning for another test, this time w/ the gas cap closed
. It seems to accelerate more authoritively now and the startup was instantaneous. I'm wondering if the bad injector was causing a slow pressure leak. It also helped that put in a new battery yesterday, too.
Here in Phoenix my experience is that no matter what quality, batteries last 2 summers. Not 2 years but 2 summers. I generally take the battery in after 2 summers for a new one whether or not it tests bad rather than wait and have to change it in a freaking hot parking lot miles from home (they always seem to die in the summer). I'll take the prorated exchange credit hit any day compared to that!
I still have about 15 seconds worth of lousy throttle response upon cold startup - I've had this issue for at least a year now, but once that'* past, it runs very good. And I still think the acceleration is a bit flat compared to a '98 my in-laws owned a couple years back. when I measeured the fuel pressure last winter, I think it was about 40 PSI which is under-spec if I remember right. But it was solid and did not move at all during driving. I'm going to measure it again when I get the chance.