Well what a crap day today working on my "green one". As some of you are aware, I have had a torque convertor lockup problem for a while now. I have listened to every body"s advice and have done the following.
I first off replaced the torque convertor solenoid. No good.
I scanned for fault codes and got an intermittent TPS reading. Replaced the TPS. Checked the wiring loom. Still scratching my head.
Tested solenoid pin outs at fire wall. All OK there but still no lockup.
I then tapped a wire from the lockup wire after the plug on the firewall and ran that into the cabin. Connected my multi meter to that wire and earth and went for a drive. To my surprise my meter showed 13.5 volts when the convertor should lock up.
Well today I went into the trans pan again. Removed the solenoid and tested it. It was fine. I attached a hose to the end and blew pressure into it. Blocked like it should be. I then did the same while giving it battery power and all was clear. I tested the resistance of the solenoid and got a reading of 12 ohms. Right on the money. I the tested the wire that I had tapped into back to the solenoid and had no resistance so that was all good. Reinstalled the solenoid and got a reading of 12 ohms again from my test wire. Put it all back together and still no lockup.
Faaark.
It looks like I will now have to change my transmission and torque convertor.