99 ex idling issues/p0505 help please

DaLostONE69

New Member
5+ Year Member
So my check engine light came on with the code p0505. So after going through the possible causes for the cel(cleaned the throttle body,replaced the iacv, double checked vac lines.) It popped back on. While I checked the vac lines I was curious and unplugged the iacv, and it idled fine. So now I'm stuck as what to do next. Can someone help me please, any help would greatly appreciated

Unplugged idles around 1000 rpms or so

Plugged idles between 1500-2000 rpms
 

AlaskaB16

DOING WORK!
Registered VIP
Did you reset the ECU after you did all that?
 




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