cbr900boy

Well guys, I just came back from AutoZone and found an error code of P0505: Idle Air Control Valve Control Circuit. Probable Causes - 1.) Open or short circuit condition 2.) Poor electrical connection 3.) Failed IAC Motor. This is what was stated on the printout.

I thought for sure I was going to have to replace my front O2 sensor based on my Check Engine, VSC, TRAC OFF lights coming on once in a while. But the diagnostic tells me otherwise. Do I have to go back to AutoZone when the these lights come back on to find out if my O2 sensor is bad? Now what do I have to do with the error code of P0505? Would this cause the same lights to display as well? I have 2001 V6. Oh yeah, my 4Runner idles at 500rpm, is that too low?

cbr900boy

Ok, so I went to PepBoys and picked up some SeaFoam Deep Creep. I sprayed the throttle body and cleaned it out without removing it from the engine. After putting everything back together I noticed that my rpm now idles at 650 while in gear and 800 while in park. I guess I fixed the problem because it used to idle at 500 while in gear. My questions is, what is the normal operating RPM while in gear and while in park for a 2001 V6 4Runner? I swear I searched but did not find anything. Oh by the way, the IAC on my rig is located on the side of the throttle body not on the bottom.

One_96TR4

Sounds about right now. I think it's usually about 700rpm but that should be fine.

JC_ez

I've been struggling with a low idle for a while too. I took off the IAC unit and cleaned it last weekend. It was REALLY dirty and gummed up. I used to idle ~500 to 600 rpm in gear before the clean, and now I idle ~650 in gear.

Do you notice your idle fluctuating while stopped and in gear? I sometimes catch mine dropping to 300 and them jumping back up to 650 again. Also when I am parking and I need to reverse and go forwards several times, I notice that my idle starts to fall. It sometimes reaches 500 and my 4Runner starts to shake a bit.

cbr900boy

My idle fluctuates on several occasions. When I turn on my headlights, the RPMs drop a tad. When I turn on my A/C the RPMs raise. You should take your rig to an Autozone and run a diagnostic to see if you pull any error codes.

MTL_4runner

650 RPM while in gear would be just perfect. Mine is very smooth at that engine speed although in winter it may vibrate a little in gear at a stoplight. Out of gear and idling you should see about 700-750 RPM (800 would be a tad high but nothing to get concerned about).