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.

Car runs fine then gets in slow mode

Old 02-16-2006, 10:02 PM
  #1  
philly3384
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Default Car runs fine then gets in slow mode

The car will be fine when first started it will run great once the thing is warmed up it runs like **** ... it will be running and then u can actaully hear it get quieter adn the rpms go down and the throttle responce is horrible it is really pissing me off. Its been like this for awhile now ... but now the car wont heat up either it wont go past the beginning of N of Normal on the guage.
Someone help before i sell it
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Old 02-16-2006, 10:42 PM
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marx91
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Default RE: Car runs fine then gets in slow mode

your thermostat might be stuck open, and that why its not heating up
when a car runs to cold it causes a rich condition
whats your TPS set at? have you ever cleaned or replaced the IAC?
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Old 02-16-2006, 10:48 PM
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PRO50SC
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Default RE: Car runs fine then gets in slow mode

WHAT KINDA' CAR???

https://mustangforums.com/fb.asp?m=1033313
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Old 02-17-2006, 01:49 AM
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philly3384
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Default RE: Car runs fine then gets in slow mode

see where it says philly3384 click it and its in my sig didnt i post that? im sorry for the incovenience it takes 1 sec to click the name where as me naming all the modes and the model and year of the car every ****en post have a nice night get serious.
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Old 02-17-2006, 01:52 AM
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Low_5.0
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Default RE: Car runs fine then gets in slow mode

check your MAF sensor, they get dirty easy, espically with a K&N, the oil on the filter can get onto it and mess it up, just my 2 cents
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