2000 IAC Valve Question

[Sycoa]

G'day folks!

Last time I had trouble with my Echo, I got the help I needed to fix my car myself on this forum, saving myself a bout 400 bucks. Now I have another simple question that I cannot seem to find the answer to at the moment.

My car has been having trouble starting as it's getting colder in the mornings, my tach is running at 700-800rpm for a short time after it kicks over, but even when starting it, it almost stalled. Yesterday we got our first morning of frost. I went out the start my car, and it stalled. I tried it again with my foot on the accelerator, and it kept running, but barely, until it warmed up some, then it runs fine.

After a look online and a trip to have my car scanned, the code comes back as the IAC valve. I had a look at it today, pulled the air intake off and cleaned the throttle body with spray cleaner, making sure I put a fair amount into the hole leading to the sensor. I left it dry for 20mins, and tried starting the car. It wouldn't start the first time, but the second time it ran fine, but still the hesitation.

So, I had another look around, and I discovered that there is a short cable that leads from the IAC valve around to beside the throttle body. The cord is badly corroded right before the connection to the IAC. I just nudged it and one of them crumbled. Somehow my car still starts even after that, but I'd definatley peg that as the problem.

Now, all that being said, I can't get ahold of any auto part stores until Monday as they are all closed, so I looked online to find out what the name of this cord is, and I cannot find anything.

This is going to sound kind of noobish, but what is the connector cord actually called?

Thanks in advance!

[Sycoa]

G'day folks.

After some tinkering around, I've fixed one issue and caused another. The part that I was referring to in my previous post was a Throttle Body connector. This cord goes in both the throttle body and the IAC valve, joins together, and goes into 3 or 4 more connections under the motor. I however, am not inclined enough to be able to get underneath my car and hook all those up, so I tried the next best thing. The connection that plugs into the IAC valve, just by the coolant cap near the radiator, was the one that was pretty badly corroded. I dropped by a local wreckers and picked up another cord from a 2000 echo. I unplugged the corroded connection, and soldered the wiring to the new connector.

Now, the car starts up just as it should in the cold. The problem I'm now experiencing is the idle speed is off. When the car warms up and I come to a stop, instead of a healthy idle around the 1000rpm range, my tach is sitting at 500-600rpm and the engine is ready to stall.

My second question then becomes, what did I mess up? The connections on all the wires I soldered was solid, and I didn't touch anything else. My CEL is still on, and a mechanic scanned it and said that it was the IAC that was causing it. Could it be that I have to take the neg off the battery and reset it to fix up the ECU?

Thanks!