I just used the paper clip method on my car and it pulled a code 23. It is supposed to be the manifold air temp sensor. Can someone tell me where this sensor is, or show a picture of it? The only symptoms my car has is the torque converter doesn't lock up and it does run a little rich. The "check engine" light comes on and and goes off sporadically. Would that sensor cause these problems?

 

Well I found the sensor and replaced it. No difference in the way the car runs, but so far no check engine light.

 

How bad of a job was it to replace your IAT? I've been needing to do mine for a while.

 

It wasn't too bad, but I do have skinny fingers, LOL. Mine was located under the plenum (i think thats what its called ) towards the back. You just really have to work with it to be able to get your wrench in there. I walked back and forth between the driver and passenger side probably 30 times because I had to work with it from both sides. If you remove the distributor cap it would make alot more room, but I hate to mess with that stuff.

 

So you were able to replace it without removing the plenum? I didn't realize that was possible. I'll look more closely at mine (I have a 5.0 motor), but that would be great if I could do it this way.

 

Yeah I done it without removing the plenum. I'm not quite skilled enough to remove that yet, LOL.

 

Well I drove my car today and the code 23 is back. It actually seems to be running worse then before. Now it keeps fluctuating back and forth between 500 and 800 RPM while idling. I guess the TPS is next on the list.

 

I would just like to know if you ever solved this problem. I am having the exact same issue and I cant seem to figure it out. " The only symptoms my car has is the torque converter doesn't lock up and it does run a little rich. The "check engine" light comes on and goes off sporadically. Would that sensor cause these problems? " Is perfectly the same as what is happening to my car, I changed the manifold air temp sensor, coolant temp sensor, throttle position sensor, and MAF sensor within a month of owning the car. Then about a month ago had these symptoms start and its like I cant even rive my car anymore because it is acting really boggy and slow. along with stalling every second time I come to a stop at a light. the last problem I'm having is when I do stop and its running still, I have to tap the gas to kick it down like a carbureted engine, it sits at 800-1000 rpm before I tap the gas and it goes down to 500 (or stalls out instantly.) any help would be sweet if anybody sees this of course I know this post is 10 years old.

 

Have you replaced your mat/iat sensor ?
The tcc lockup doesn’t have anything to do with the code 23.

 

Yes I've replaced the mat sensor, that's right after the code came up the first time, as for the TCC I was just hoping the original poster but that happens too. I guess unrelated problem...

 

Look at Post 4 in the link for the tcc schematic. You can use a test light on pin f on the aldl to see if it’s getting power during tcc lockup command.
If it is sounds like it’s the tcc solenoid.
https://www.thirdgen.org/forums/tran...51750-tcc.html
If you have a code 24 I could see tcc not locking up with the loss of Vss signal.
It’s hard to get a response from a ten year old thread. And would you trust max hheadroom .