5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Start the car... immediately it revs

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Old 07-08-2005, 05:21 AM
  #1  
ricepatrol
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Default Start the car... immediately it revs

Hey guys, every once and a while I experience this;
I start the car and immediately the car revs high.. then dies back down and is just fine.
I was curious, what causes this?
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Old 07-08-2005, 06:41 AM
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Black Snake
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Default RE: Start the car... immediately it revs

Vacum leak maybe.
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Old 07-08-2005, 07:01 PM
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95_302_StangMan
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Default RE: Start the car... immediately it revs

how high does it rev? if about 1500rpm this is normal.
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Old 07-11-2005, 01:20 AM
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stangster666
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Default RE: Start the car... immediately it revs

i forget the name of the part but it is the sensor that bolts to the throttle body. my old 88 gt used to do the same thing then i changed the sensor and wala everything was smooth. you can get the part at a pepboys or discount auto parts for around $80.00 if i can remember what the thing is called ill let you know but if you just look at your throttle body you will see it. it is a 10min fix 2 screws and i connector
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Old 07-11-2005, 06:23 AM
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HAUS
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Default RE: Start the car... immediately it revs


ORIGINAL: stangster666

i forget the name of the part but it is the sensor that bolts to the throttle body. my old 88 gt used to do the same thing then i changed the sensor and wala everything was smooth. you can get the part at a pepboys or discount auto parts for around $80.00 if i can remember what the thing is called ill let you know but if you just look at your throttle body you will see it. it is a 10min fix 2 screws and i connector
you talking about a tps(throttle position sensor). or IAC motor(idle air controll)
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