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  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

Idle rpm issues

  • Thread starter Thread starter 99stallion
  • Start date Start date Jan 13, 2013

99stallion

New Member
Aug 1, 2007
29
0
1
Jan 13, 2013
#1
  • Jan 13, 2013
  • #1
Hey guys, I'm posting this in the v8 forum since u guys tend to respond a bit faster. My 99 mustang is having some problems. When I start it and back down my driveway sometimes the rpm will stick at a higher idle when the clutch is in, until it warms up. Also, when I slow down and come to a stop at a light, with the clutch pedal pushed in, the rpm will drop extremely low and the motor will shake a bit....it has almost died on me before.

The car is a v6 manual transmission. It has under drive pulleys, upgraded coil and plug wires, cold air intake and 70 mm throttle body, and a diablosport predator tune along with true dual exhaust....among other things. I remember reading a post with similar problems a long time ago and recall it possibly having something to do with the combination of the tune and intake system. Any ideas?
 

Jhussey1280

Member
Jan 31, 2012
185
4
19
New Pal, Indiana
Jan 14, 2013
#2
  • Jan 14, 2013
  • #2
IAC may be dirty, vacuum leaks, TPS. There's really a slue of thinks it could be. Start simple by cleaning the IAC and see what that does.
 
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