Crankin the car when it sat overnite starts right up, idles high for a few secs, then quiets down to a nice purr. 5 min of running and rpms damn near get cut in half. Just enough to keep running. Popping the throttle will kill it. A/C on and off does the same. Starting it back up when already hot takes a while. Once you start driving, car runs fine.... until you come to a stop sign or light again, then idles like crap. Thought maybe leaky injectors, but no visible fuel or smell. Put injector cleaner just to see if any difference, nothing. Considering next would be to send em off for cleaning. First 7 i've owned myself, so I dunno if the TINY bit of black smoke it puffs at startup is "normal" or not. It'd be nice to hear what others think could be causing this. Search brought up all lots on injectors but all about clogged ones, leaning out, and i was thinking mine is too much fuel at idle? Search flooding came up with people who had probs during normal driving too, so I sorta leaned away from that as a cause. Experts have any idea?

 

You may have a vacuum leak. Also check your MAP sensor.

 

Oh, see, I had ruled out vacuum leak since the car runs great other than at idle. I figured that would affect it's overall performance. I'll do some reading up on the MAP to see how I go about that.

 

Its a little box mounted on the firewall just to the drivers side of the intake manifold. It says SENSOR - BOOST on it. Check the connection there, and on the other side where it goes behind the UIM.

 

Vacuum leak will cause a high idle.

 

Sounds like a possible fuel pressure regulator could have been disconnected. Very similiar problems happened to me when I forgot to connect mine.

 

Cool, thanks guys! I'm off work in a few so when I get home I'll take a look at the fpr and map, see what I can find. I've turned up the idle for now, so at least it can get around without dying at every street corner.