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.

issues still

Old 02-11-2008, 06:21 PM
  #11  
LTnone
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Default RE: issues still

Whatever it is, my semi-uneducated guess would be that you're either misfiring or running lean. If the exhaust noise is quieter, you're probably not making as much combustion. I know that my stang was loud as hell when it was running 10.5:1 pre-tune. Sounded darn good, too!
My first move would be to check fuel pressure.
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