RPM's Won't drop! - MustangForums.com

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RPM's Won't drop!

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Old 05-06-2006, 04:44 AM
  #2  
STANGLVR
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Default RE: RPM's Won't drop!

I think its your throttle positioning sensor
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Old 05-06-2006, 11:20 AM
  #3  
BCisme
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Default RE: RPM's Won't drop!

that or you have a vaccum leak of some kind. do you have an aftermarket plenum? the C&L is known to leak and cause these problems, my car did.
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Old 05-06-2006, 11:55 AM
  #4  
96GTmustang_man
 
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Default RE: RPM's Won't drop!

Idle Air Control possibly?
Your symptoms sound similar to the ones I was having when
mine was was dirty.
I took it off and cleaned it and fixed the problem.
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Old 05-06-2006, 01:48 PM
  #5  
wwmost
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Default RE: RPM's Won't drop!

try cleanin the iac with carb cleaner.
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Old 05-06-2006, 07:04 PM
  #6  
97targa
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Default RE: RPM's Won't drop!

Had the same problem..I replaced the AIC valve and didn;t fix it. I fussed with the TPS and fixed it.
I was running around 2200rpm and settled to 1600.
Unplug your TPS harness with the engine running to see if the rpm's drop.
If so it's your TPS.
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Old 05-06-2006, 07:19 PM
  #7  
40thgtfl
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Default RE: RPM's Won't drop!

Idle Air Control x2
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Old 05-06-2006, 07:39 PM
  #8  
chet sexington
 
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Default RE: RPM's Won't drop!

its probly in netural.
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Old 05-06-2006, 07:53 PM
  #9  
Flyingmau5
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Default RE: RPM's Won't drop!

dont clean ur IAC... just replace the thing.
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Old 05-07-2006, 01:57 AM
  #10  
rbstang
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Default RE: RPM's Won't drop!

clean IAC usually gets dirty and causes the rpms to hang during shifts. #1 problem in mustangs...
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