4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

Idleing Problem

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Old Feb 23, 2005 | 09:00 PM
  #1  
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Thunder Chief
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Default Idleing Problem

Seems ever since I put my flowmaster exhaust on the car takes a long time to idle back down between gears. When shifting the engine RPM's stay around 2500 and if I just coast it takes about 3 to 4 seconds to drop to my normal 750. Is my throtle sticking?..TC
Old Feb 23, 2005 | 09:26 PM
  #2  
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Default RE: Idleing Problem

Clean out your IAC and lines. Could be carbon build up.
Old Feb 23, 2005 | 09:27 PM
  #3  
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Default RE: Idleing Problem

If the IAC cleaning doesn't take care of it, next step is your TPS. (Throttle Position Sensor).
Old Feb 24, 2005 | 12:42 AM
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Default RE: Idleing Problem

I'm new to this, what are my IAC lines...TC
Old Feb 24, 2005 | 12:55 AM
  #5  
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Default RE: Idleing Problem

Alright, got the IAC line definition, what do I clean them with...TC
Old Feb 24, 2005 | 01:09 AM
  #6  
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Default RE: Idleing Problem


ORIGINAL: Thunder Chief

Alright, got the IAC line definition, what do I clean them with...TC

Your not the only newbie ?? IAC line ??
Old Feb 24, 2005 | 02:22 AM
  #7  
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Default RE: Idleing Problem

Mine does this sometimes when I do a mod. I usually just unhook the battery cable for about 15 min and then it's fine after that. It sometimes will still hang around 1500 for a couple days or so then go back to normal. I don't know why it does it.
Old Feb 25, 2005 | 05:04 PM
  #8  
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Default RE: Idleing Problem

Well the battery trick didn't work and my IAC lines are clean, how do I check the TPS..TC
Old Feb 25, 2005 | 05:15 PM
  #9  
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Default RE: Idleing Problem


ORIGINAL: GTron

Mine does this sometimes when I do a mod. I usually just unhook the battery cable for about 15 min and then it's fine after that. It sometimes will still hang around 1500 for a couple days or so then go back to normal. I don't know why it does it.
Engine computer probably recalibrating itself...
Old Feb 25, 2005 | 05:17 PM
  #10  
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Default RE: Idleing Problem


ORIGINAL: Thunder Chief

Well the battery trick didn't work and my IAC lines are clean, how do I check the TPS..TC
Here's a link that should help in doing that. http://www.muscularmustangs.com/tps.php
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