i've got a 10th ae. ad i'm having problems when warming up. th car starts fine and goes right to it's fast idle at 3000rpm. once the idle drops to 2000 after about 1-2min the idle starts to fluctuate up and dow 100-200rpm while it warms up. once it's warm it is perfectly fine, and the idle is steady at 800rpm. i'm not sure where to start with this problem. any ideas?



p.s. not sure if related but if i hold the rpm at 1700 it fluctuates aswell. like the rpm jumps up and down quickly.

 

Check for vac leaks and check ur Tps.