4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

exhaust leak

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Old 08-06-2008, 11:33 PM
  #1  
changolocs85
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Default exhaust leak

hey guys quick question, i recently put on headers, and on my passenger side header i have a ridiculous exhaust leak. will this make my car run like ****?
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Old 08-06-2008, 11:51 PM
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changolocs85
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Default RE: exhaust leak

bump i really need help because the car runs like doodoo and wont idle unless i give it some gas, i checked everything else, o2 sensors, vacuum leaks, fuel and air delivery. and no other problems the exhaust leak is the only thing. it idles fine, but when i put it in gear it will just shut off unless i give it gas.
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Old 08-07-2008, 12:05 AM
  #3  
changolocs85
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Default RE: exhaust leak

one last thing to add, i pulled out my plugs, no carbon and theyre not melting or anything like that, but theyre really really brown, and im sure they have been in there for more than a minute. thnx for any help guys god know i need it
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Old 08-07-2008, 12:22 AM
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steve0914
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Default RE: exhaust leak

clean your iac...
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Old 08-07-2008, 01:14 AM
  #5  
changolocs85
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Default RE: exhaust leak

thnx steve cleaned out my iac made a world of difference, still does it a little bit thought ima try the maf next...
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Old 08-07-2008, 02:08 AM
  #6  
35thAnni99GT
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Default RE: exhaust leak

A ridiculous exhaust leak will dilute the emissions going to the O2 sensors and change your a/f mix @ idle possibly causing your problems. Fix the leak.
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Old 08-07-2008, 10:30 AM
  #7  
lewistk
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Default RE: exhaust leak

+1 on a wrong reading at 02 sensors. will change ur a/f ratio. is ita blown gasket ? or the header?
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Old 08-07-2008, 12:14 PM
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98redstang
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Default RE: exhaust leak

+2 lol on the o2 and the a/falso youll be losing back pressure on that one side and exhaust leaksare annoying as hell. And if its a blown gasket that sucks cause you gotta do all that pita work again. Good Luck
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