3 problems at once??

[Scott McLellan]

My check engine light came on last night and I noticed the next time I tried to start it, it just barely hesitated to idle right at the beginning but other than that seemed to drive fine. So today I checked the codes and I got 25 (IACV-AAC valve), 77(Rear O2), and 105(EGR & Canister control solenoid valve). My question is this: what are the chances that all three things need replaced or fixed whatever? I'm going to do the test on the IACV thingy described in my Chilton. Can anyone give some advice or have any experience with these particular problems? THANKS!!!

[s13sr20chris]

rear o2 sensor is no big deal. all it does is diag the cat function. it has no effect on how the car runs. the egr/canister solenoid is an emmissions control that is fairly important for emmissions but thats it. the iacv-aac is important to keep the car idling like butter. if you feel like it you can take it apart and clean it out with carb cleaner. all of theese things prob did not happen at one time.

[Scott McLellan]

Hey thanks for your help. I'm still a little confused why they all decided to go at the same time, or at least didn't turn the check engine light on until last night. I had just driven my car for several hours right before I had to take off again and that's when the light came one. Do you think that the rear o2 sensor would be reading an 'okay' signal since I have a high flow cat on the back of a hotshot header?

[s13sr20chris]

yeah i would not worry too much about that rear o2. start with your highest priority code and work your way down. it is odd that they all happened at once.