99 D2 idle speed is a bit high, is it adjustable?
#1
FIXED! Another vacuum leak! 99 D2 idle speed is a bit high, is it adjustable?
Recently purchased a second D2, a 99. The idle speed is a little high once it warms up. Wondering if the idle air controller is responsible for this and whether it might be adjustable. Also noticed that the cruise control is inop,...and do have some broken vacuum lines at the cruise unit,.....could this cause the problem?
Brian in Austin.
Brian in Austin.
Last edited by bcolins; 06-12-2016 at 11:19 AM.
#3
Alex, replaced the vac line,. Good news is that my cruise is working again,.....however my idle speed is the same,.....about 900 by my tach
#5
Yes, my scan tool can check O2 sensor readings. Not sure what reading I am looking for though. I did make a throttle cable adjustment a few weeks ago,,..I'll check it in the morning
#7
#8
The computer adjusts the idle on a D2. At least, that's all I could find out when I was wondering about my own idle.
When my engine runs bad and I can't find a physical problem I just unplug sensors until it stops running bad. I always start with the MAF. But your idle air control valve could also be dirty.
When my engine runs bad and I can't find a physical problem I just unplug sensors until it stops running bad. I always start with the MAF. But your idle air control valve could also be dirty.
#10