High idle on top swapped Monte

[AL]

My buddy just got his Monte top swapped but now has a high idle in park but not in drive, heres his video from facebook

 

http://www.facebook.com/video/video.php?v=10150118810868975

 

Heres what he PMed me about:

him: so you think a vacuum leak could cause the idle

 

me: yah

 

him: cuz it only starts reving higher after a bit

hmm ill have to look around it

 

me: what do you mean

 

him: it starts at 2000 rpm

then builds up after mabye 10 seconds to 3000

and idles fine when its in drive

 

me: spray carb cleaner around the lines and the idle will change if the cleaner get sucked up in there

hmmm ill post on w-body about it

 

him: i installed a boost gauge too

might be leaking around there

 

Any other things that would cause that?

[slick]

Vac leak

Reset IAC

Fucked up the gaskets during install

 

Hard saying

[tornado_735]

The vid doesn't show because of privacy settings.

 

Did he try and idle relearn?

[AL]

Dont know, I didnt even know he completed the topswap till he posted the vid... Ill see if I can find an alternate way to post it

[Addicted to eaton]

The vid doesn't show because of privacy settings.

 

Did he try and idle relearn?

 

last i knew that does not work on a 1st gen..

 

I know my 99 would rev up with out the intake on it. But would idle fine with the tube on it.

[AL]

I didnt even mention, his car is an 03 SS 3.8 NA, top swapped

[AL]

http://s130.photobucket.com/albums/p250/enzo354/?action=view&current=Carla.mp4

[PaulBennett]

What means "top swapped" ??

[AL]

It was originally a non supercharged 3800, but he put the top end of a supercharged 3800 on so its now supercharged

[enzo354]

Ok so the IAC is at 130-170, idling anywhere from 2000-3000rpm. Nothing else is wrong but that, and I know its not an issue of the control itself, its where its reading from or the wiring. Any ideas?

[AL]

Welcome to the forum Brock

[enzo354]

Well hello haha.

[enzo354]

Anyone?

[9lumina6]

Are you running an L36 or L67 MAP sensor?.....idk if that would really matter...but just curious. And check all the vac lines to make sure they are routed correctly. Also....maybe change the PCV valve in the blower...

[Galaxie500XL]

I don't know if the sensor itself makes a difference, but I'd suspect it does. Keep in mind, a supercharger does it's best work a lower RPM...which, when you stop and think about it, would reduce engine vacuum...just like a vacuum leak.

 

I was under the impression the PCM programming was different on the L67?

[AL]

It is, he had it tuned

[enzo354]

Its been tuned and the SC belt isnt hooked on yet, so its not an issue of that. Ive triple checked the vacuum lines already. What sends the code to the IAC?

[AL]

the PCM, but I dont know what it used to determine the counts

[9lumina6]

Ya know...I wonder if the sensor itself is just bad. Did you swap sensors over from the L36 TB to the L67 one? I'm not 100% sure if the part #'s are different.

[AL]

You talking about the MAP sensor or which sensor

[AL]

He found the problem... The TPS sensor was bad