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2002 wrx low idle? please help

11K views 8 replies 8 participants last post by  Thecabindweller 
#1 ·
hey i have a 2002 wrx a few bolt ons done nothing major but the car when running warm at idle the rpms seem low to me right around 400-500 rpms when idling cold its much higher around 1000 to 1500 rpms what could be wrong and how can i check pm me or reply on this thread thanks tim
 
#7 ·
Guys if your car is actually idling at 500, that means that when at idle the tach needle has not moved. The tach's first graduation is 500. The second is 750, and the third 1K. The needle is usually between the second and third, meaning it's at 750 or higher.
 
#8 ·
Idle speed should be at 750 +/- 100 RPM. If he's not seeing above 500 RPM on warm idle, he could have an IACV problem. However, a 1500 RPM cold idle is normal.
 
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