My car is running like crap. It stalled out on me as I was waiting to make a left turn into a parking lot.. I had to restart it and then go. After getting back into my car a few minutes later, the car started up but was not right. Whenever I idle back down to a stop, the car wants to stall and I have to put it in nuetral and keep revving it to keep it going. It still stalled on me on the way home though. And when I got home, after I pulled into the parking spot, I just sat there to see if it would stall and it did. I had the battery and alternator checked. They are fine. I thought maybe alternator problems because as long as Im going thru the gears and going down the road, its fine. Its when I start slowing down or am idling. But it doesn't do it everytime. So Im lost. Also, tried to put 2 different scanner tools on my car to see what the engine code was, neither tool would link up. I've had an EVAP emissions code for a year now, so my light has been on. But I thought I'd check with the tool to see if I had any new codes. So, any ideas on why neither tool would link up to my car?? And does this sound like a vacuum leak? Thanks for any ideas!

 

Could be a stuck open EGR valve. It would be the same thing as a big vacuum leak. Could be a lot of other things, too. Perhaps the scan tools rely on 12v from the DLC. Make sure you have no blown fuses that would keep it from getting 12v.

 

Check your IAC (idle air control). Look here and see how to's 43&44.

 

Try a fuel pressure gauge too. Mine has been doing something very similar and after all of my troubleshooting, it appears to be a fuel pump on its way out. It's fine until the car warms up for a while and then it starts wanting to stall at idle. Let us know if you figure it out.