[V8] 2231 code hell, i'm at my wits end!

[Paul DAnneo]

Hey Ron,
My V8(91 3.6) I have chased around a bunch of codes and did continually get the 2231 code reaccuring. 
My problem was ignition related. After a full ignition tune, wires, plugs, caps, rotors, O2 sens. Codes cleared.
Hope this helps,
Paul


________________________________
From: Ron Wainwright <ron_01056 at yahoo.com>
To: v8 at audifans.com
Sent: Thursday, October 20, 2011 2:50 PM
Subject: [V8] 2231 code hell, i'm at my wits end!

I guess the long and short of it is I just can't get rid of the ISV code.I've been getting the code for about 2 months now and have went through everything....
 The weird thing about it is the ISV is brand spanking new. I found one on ebay NOS (new old stock). When I got it, it was as advertised clean as a whistle! 
 in the time I have been getting the ISV code I have all so gotten codes for,02 sensor and iat. So I replaced,  02 sensor. I was getting an oscillating idle. It would go from 1,000 to 1,600'ish and kept repeating till I would hit the throttle. Allen unplugged the Green wire and it went away. So I replaced it and works as it should now IAT. The one in the car looked fine. Wires were fine as well. I had cut the sheeth back and checked the wires and they were fine. it was solidly sotered still to the sensor. the wire and diod thing was a little dirty, I cleaned it looked fine ect. I replaced it anyway with a new 4.2/Urs4/6 plug in type and the correct connector. 
 I all so replaced all the breather hoses, valve cover to cover, rear driver side, front intake, the small one that goes around the rear intake opening. I all so replaced the one's that go from the valve on the pass side fire wall, (it's Yellow and Black). There's a hose that goes to the back of the pass side intake, a small one coming from under the rain deverter and a length of the hard Black plastic type hose running along the firewall.
 I tried another ECU...one from a 5sp. I pulled the original engine wiring harness. Which meant I had to pull the Intake. So I replaced the intake gaskets, and Green Knock sensor as well. I replaced the MAF, tried two different TPS's and know I have adjusted them correct! Allen even did it a few times just to make sure I was doing it rite...... I have tried two different throttle bodies as well. All related fuses are fine ect.....
 I had a friend check codes with his scanner and couldn't clear the ISV code. It would go away but pop rite back up while the computer was still hooked up to the car and with the car off!
 I need help! I have no idea were to look next????
 Ron

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