idle issue



#1
for some reason when the car is in neutral or the clutch is pushed in the car revs from idle to about 2800 rpms i have replaced the throttle position sensor and the idle air control valve. with a full racing exhaust it gets really annoying. its almost like a vacuum leak cause sometimes when its in gear with my foot off the gas it still accelerates
 


#2
im having the same issue. did you get it figured out? mine will stop jumping if i turn my heater on high and head lights on causing a draw in power. but dont know what it causing the issue
 




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