EXTREMELY HIGH IDLE-Do the IAC's go bad on these cars?

[rgurleyjr]

So I just bought a 01 LE. I changed the plugs, cleaned the PCV, sprayed TB cleaner inside TB, and cleaned MAF sensor with electronic cleaner and now the car goes right up to 2400rpm's and stays there, it will not go down. I disconnected the battery, nothing. I can't take it to get the codes checked because I don't have a tag for it yet.Unplugging the IAC does not change the rpm's at all. Do you think that me spraying carb cleaner inside allowed some of it to leak down into the IAC valve?

[Danimal7]

Originally Posted by rgurleyjr

So I just bought a 01 LE. I changed the plugs, cleaned the PCV, sprayed TB cleaner inside TB, and cleaned MAF sensor with electronic cleaner and now the car goes right up to 2400rpm's and stays there, it will not go down. I disconnected the battery, nothing. I can't take it to get the codes checked because I don't have a tag for it yet.Unplugging the IAC does not change the rpm's at all. Do you think that me spraying carb cleaner inside allowed some of it to leak down into the IAC valve?

was it running at normal idle before you cleaned everything out?
have you tried letting the engine run for 5-6 minutes to see if the idle speed goes down with time? maybe it needs time to readjust...sometimes things work themselves out in mysterious ways.

[rgurleyjr]

I ended up removing the IAC Valve and spraying the valve down with carb cleaner. It's fixed! I'm guessing that some trash seeped down in there after I cleaned the TB, I didn't realize that the IAC was on the bottom of the TB until after I cleaned it. No, the car idled fine before I did all of this, hence why I tried cleaning the IAC.

[Transformer]

Same thing occur to my corolla, does anyone have instuction on taking out the IAC? I know its under the TB but I just want to know specific instruction. Thanks.

[rgurleyjr]

I unbolted the TB from the intake, unplugged the two connectors, left the two coolant lines attached, and turned the TB over so I could get a screwdriver on the four screws. Once you take all four out, pull the IAC assy off and hit the valve with cleaner.

[Kiwi-Corolla]

^ Yep, that's what I did with mine. Just be careful not to round the heads of the screws as they can become quite brittle over time. The best thing to do is to put it on a workbench and apply a lot of downward pressure as you turn.

[Transformer]

Originally Posted by Kiwi-Corolla

^ Yep, that's what I did with mine. Just be careful not to round the heads of the screws as they can become quite brittle over time. The best thing to do is to put it on a workbench and apply a lot of downward pressure as you turn.

Thanks, I am going to try to clean it tonight. Do I need to replace any gasket at all?

[Kiwi-Corolla]

Originally Posted by Transformer

Thanks, I am going to try to clean it tonight. Do I need to replace any gasket at all?

Nope, as long as you're careful with the removal. The main one to be careful of is the throttle body gasket, although it's pretty durable .

[Transformer]

Thanks, can I clean the IAC without taking those hard screws out?

[Kiwi-Corolla]

Unfortunately not, as the IAC is underneath the plate with the screws in it.

[Transformer]

Originally Posted by Kiwi-Corolla

Unfortunately not, as the IAC is underneath the plate with the screws in it.

Ahhhh, ok. Hopefully I can take those screw out and don't damage it...

[Kiwi-Corolla]

I'm sure you'll be fine. Just put a crap-load of pressure on the screws as you turn, and be sure to use the correct size screw-driver. If you've got a ratchet with a Phillips attachment then that would be perfect. All the best bud.

[white_trix-e]

when u take out the iac theres a gasket and if it seems worn u should change it rather then just shouving it back in trust me i learned the hard way. and if ur afraid to take the throttle out do what i did. take the battery and air box out u should have enough room to unscrew and if u strip a screw they have pretty big on the heads so just get pliers and loosen them out and local hardware or auto shop should have exact matches. and coolants guna spill so make sure theres a rag near by

[Transformer]

Ahh... I am having hard time unplugging those two connector, any advice?

[white_trix-e]

small flat head and needle nose plies