Stalls out and idle is inconsistant - Forums at Modded Mustangs
 
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post #1 of 4 Old May 15th, 2010, 10:51 PM Thread Starter
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Stalls out and idle is inconsistant

I have a 2000 GT 2v 4.6l My car is idleing weird. IT will be at 1200rpms and then go as low as like 300rpms to rev back up to 1200. Sometimes will even stall out. Its rather annoying to pull up to a stop light and have to start your car up or people think im revin at them. Its a 5 speed and does this in N or any gear w/ clutch in. I do have a 70MM TB and a 75MM Plentum and new TPS sensor.

Any ideas?

2000 Ford Mustang GT 5spd (TOY)
1997 Ford Tunderbird LX = Daily Driver
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post #2 of 4 Old May 15th, 2010, 11:12 PM
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Do you have the factory mass air flow still?
Also does it make a difference when you turn your AC on or off? It sounds like it could by you're IAC.

02 GT --> long tube headers w/ x pipe and flow masters, throttle body w/ intake plenum, cold air intake, short throw, 255 nitto 555's all around, 373 diff gears, 2 inch lowering kit w/caster camber plates, sony radio working with stock system
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post #3 of 4 Old May 15th, 2010, 11:49 PM
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please check this link, it might be helpful

Quick steps of cleaning the IAC.




2000 Mustang GT Auto
-Custom o/r X-pipe
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post #4 of 4 Old May 17th, 2010, 10:39 AM
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I had the same thing happen to my car last week. Same EXACT problem. When the idle is bouncing around, unplug the MAF. I unplugged my MAF and it smoothed right out. Been driving like that for over a week now.


Do you have a tuner where you can monitor MAF counts?

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