[mgkuhn20]

Hey all,

I have a 96 Intrepid w/3.3, the other day I went out to start it (about 35 deg outside) when it started it idled around 2000-2500, not normal. I shut it off and restarted and it was fine. A few days later I was driving around and came to a stop light and it felt like it was shoving me throught the light, I put it in neutral and it was idleing around 2500, it has done this several times since. I have checked and there are no codes showing up, I am kind of thinking it could be the idle air control valve or the TPS, has anyone had similar probs. Also is the IAC part of the throttle body and if not where is it located. Any help would be appreciated.

Thanks Guys

 

[1mz-fe]

might be sucking in air from somewhere other than the intake manifold. might be gaskets somewhere in the intake system or it might have a vacuum leak.

 

[LiqTenExp]

The intake manifold gaskets go bad on these cars. Take something like carb cleaner and spray it around the edge of the intake and if the engine stalls out or acts weird thats where your leak is.

 

[Mopar4U]

I think the 3.5 had more of the problems with the intake gaskets.

 

[swartlkk]

My first guess would be that your IAC motor is going on the fritz. That seems like way too high of idle and way too spuratic to be an intake manifold leak. The IAC (Idle Air Control) motor is located directly between the two throttle bodies on the back of the intake manifold. Get that checked out. If I remember right, it wasn't that expensive of a fix.

Good luck,

 

[1mz-fe]

IAC motor has a fault code though.

 

[swartlkk]

Mine didn't... The only way it will trip a fault code is if something is wrong with the motor itself. Mine would lose track of where it was in its stroke when it was cold and it would not close all the way. This would not produce a code because as far as the computer was concerned it was still working and it thought that it was in the position that the computer had told it to go to.

Replaced the IAC valve on my car and it went back to normal. Just telling you what my experience was.

Later,

 

[1mz-fe]

actually you are right and i have no idea why i posted that last one. i should really think twice before pressing the reply button sometimes.

 

[mgkuhn20]

Thanks for the info, I think I may have figured this out. A couple of days before this prob started the v-belt on the air conditioning compressor started making a noise, I looked at it and it had a chunk out of it. So figuring what the hell it is winter, I just cut the belt off and disconnected the connector to the air. Well guess what, even when you are not using the air the computer will kick the compressor in periodically too keep it from locking or freezing up in the spring from not using it in the winter. So what is happening is the computer is trying to tell the compressor to kick in but being that it is disconnected it can't, and the idle air control valve comes into play since when the compressor kicks in the idle is sped up to compensate for the extra load. So in summary the computer and the idle air control valve are just a little confused. I am getting the belt today, so we will see if that ends this little prob. Thanks for the info guys, but hopefully a 3.99 belt is the fix.

Mike

 

[swartlkk]

That is a definite posibility.

Just to let you know, even though it is winter and you aren't using your a/c you should ALWAYS have the belt on and compressor plugged it. The compressor cycles to circulate lubricant through the compressor/system. This needs to be done. I unplugged my compressor clutch cause it was making noise 2 winters ago and the following summer I had to replace the compressor!!! It was still under warranty though cause I had just replaced it the summer before, but those things are damn expensive!!! Hopefully you didn't run without the belt on there for very long.