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.

bogs down when floored...

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Old 10-23-2009, 02:52 PM
  #21  
nacanitihs
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^^^ buy a timing pointer
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Old 10-23-2009, 06:34 PM
  #22  
zebo87
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for the whistling sound check your iac. it might need to be cleaned. with a surging check for vac leaks with some starting fluid by spraying it around your heads and intake. i am having the same issue and my coil is good as well. one thing i havent checked is my tfi module yet. mine runs rich n also. im used to it due to no cats but it runs richer than usual. if i can bypass the tfi plug then i will let you know the results.
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Old 10-23-2009, 11:34 PM
  #23  
9165pt0
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i swapped coils again today. and the car did feel a lil stronger. i also cleaned iac and its not making the whistle. the whistle gets extremely loud right near the top of upper intake
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Old 10-24-2009, 10:07 AM
  #24  
zebo87
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thats almost gotta be a vacuum leak with that whistling.
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