A little back ground. The car was idling fine before I sprayed water into the condensor which in turn got into the spark plug areas. I took it home (it was missing pretty bad) and took the top off of it and blew everything out, cleaned the plugs, and changed the wires while I was in there.
Put everything back together, and I'm getting a high idle (1500 RPM cold or hot). I saw the hose couplers had cracks around the reams, so I taped them up (just to verify) and shot carb cleaner at them (no difference).
I then put new clamps on it because I knew it was old. No change, still high idle.
I sprayed and visually checked every single freaking hose in the bay, no change.
I removed the IAC and cleaned it earlier today thinking thats what it was but after it being a little dirty it still was fine in terms of movement and looks.
This where I gets tricky, it dropped down to 900 RPM for a few minutes, drove it around the block and came back - turned it off and then back on- 1500 RPM. I was ready to throw my wrench at the car at this point...
I did reset the ECU via Dome & EFI fuse each time, but I took it a step further and unplugged the battery on both sides.
I have a Lexus technician swapping the mounts out on Saturday for me and he said he would look at it but I can't help but want to fix it before hand.
I did notice that the screw on the left hand side of the throttle body (looks like a set screw) is broken off at the top [like the previous owner was messing with it trying to get the idle up and didn't realize it locked on the other side]. Can someone shoot me a picture of this to see how many threads are showing? I know it's a hard angle but mine has about half an inch showing and it seems wrong.
I'm wondering if after fixing the IAC and all the vacuum leaks from the intake tubing that NOW that car can idle at the right speed and NOT need to be adjusted (hypothetically speaking).
I unplugged the IAC, and reset the car and the idle shot up to 3000 RPM so I think it's doing something.
I did notice the coolant temp sensors were soaked (but still reading out on dash, not sure on ECU). I cleaned them up and no change.
It does smell like the car is running rich. Pretty much the entire tune up has been done at this time.
Someone throw ideas at me here.