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06-29-2011, 08:06 AM #1
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Navy Blue Metallic- 98 T/A w/ mods, 00 FBVert
Does the PCM need to relearn when new IAC?
Does the PCM have to go through a relearn process if I install a new IAC (Idle Air Control Valve)?
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06-29-2011, 11:47 AM #2
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06-29-2011, 12:00 PM #3
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Navy Blue Metallic- 98 T/A w/ mods, 00 FBVert
I have gotten the part yet, will pick up on way home. Just wanted to know if it did.
This high idle (1000 rpm) has become a mission to figure out why.
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06-29-2011, 12:05 PM #4
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06-29-2011, 12:18 PM #5
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06-29-2011, 12:31 PM #6
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06-30-2011, 10:46 AM #7
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Navy Blue Metallic- 98 T/A w/ mods, 00 FBVert
well, I got the new IAC in and still no change
It did drop it to a steady 950-1000 rpm but no more. with a/c on it's 1100.
Hey Jay, did you do the air pump delete?
I ask because I traced my HVAC line to make sure it didn't get cracked or broke. Just by the PCM I see that it splits and the line follows the wire harness around to the front.
I believe this goes to the air pump which I deleted. If I'm correct it hasn't been capped off yet and that could be my vacuum leak.
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06-30-2011, 11:53 AM #8
yes that could be a leak. Reach behind the intake and make sure you only have one line coming out. Follow the single line and it meets at a 3 way valve. Disconnect the line that comes from the intake and cap it off. See if the idle gets better. Your a/c vent are not going to work properly but you are trying to see if there is a vacuum leak in the rest of the tubing after the 3 way valve.
Last edited by JayTA98; 06-30-2011 at 11:56 AM.
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06-30-2011, 02:39 PM #9
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Navy Blue Metallic- 98 T/A w/ mods, 00 FBVert
I just tried it and No change in idle except if I left it off, then it wouls rise up a little.
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06-30-2011, 05:47 PM #10
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06-30-2011, 05:59 PM #11
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Navy Blue Metallic- 98 T/A w/ mods, 00 FBVert
yes on carb cleaner, well this leaves me sending it to frost for a retune or live with it till I do h/c.
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06-30-2011, 06:04 PM #12
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07-01-2011, 06:33 AM #13
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07-01-2011, 08:43 AM #14
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silver- 2000 formula
when i put in a PP TB i also put in a new IAC......when i 1st fired it up it was idling around 2000......i trying all sorts of things to get the idle down......i finally shut the engine off and cranked it back up......idle went back to normal.......go figure
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07-01-2011, 09:06 AM #15
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Navy Blue Metallic- 98 T/A w/ mods, 00 FBVert
I've start/stop even took for a 40 min drive and still settles at 1000 rpm so I know now it is not the IAC.
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