Ludachris
Founder & Zookeeper
- 8,053
- 3,072
- Nov 12, 2001
-
Newcastle,
California
I haven't been able to find anyone else having this issue - ever since I got the car (97 TSi AWD) back from the smog check place (where they didn't even pop the hood) a few weeks back, I've had an issue with idle. It seems to only happen when the car is nice and warm, maybe a little hot. It will idle fine at start up and when the car is cool. But when it gets hot I notice the revs jump up 500 rpm to about 1400 when I'm sitting at a light. It might drop back down for a second but jumps back up and remains there. Then, after a few more minutes of driving, it will jump another 500 rpm to about 2100 rpm and hold there, occasionally dropping back down to 1400 and jumping back right back up and holding at 2100. Through all of this the car's factory temp gauge never moves from around the middle, so it doesn't look like coolant temps are getting too hot.
Is the ISC test on VFAQ something I need to do for this situation? Or would this be something different? I went ahead and made sure the BISS screw is set to about 2.5 turns. Not sure if all the 1g stuff applies though. I should probably get around to putting in the DSMlink ECU I have sitting in the garage to get some better diagnostics going. Still need to unpack after our move across the country.
Is the ISC test on VFAQ something I need to do for this situation? Or would this be something different? I went ahead and made sure the BISS screw is set to about 2.5 turns. Not sure if all the 1g stuff applies though. I should probably get around to putting in the DSMlink ECU I have sitting in the garage to get some better diagnostics going. Still need to unpack after our move across the country.