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.

ENGINE RUNNING LEAN

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Old Feb 27, 2005 | 12:37 PM
  #1  
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philly3384
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Default ENGINE RUNNING LEAN

i pulled two codes and the o2 sensors read it was lean so what do i gotta do now get a fuel regulator and bump up the fuel pressure?
Old Feb 27, 2005 | 12:53 PM
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Default RE: ENGINE RUNNING LEAN

thats wut i would do or get a new and bigger fuel pump
Old Feb 27, 2005 | 01:02 PM
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Default RE: ENGINE RUNNING LEAN

I would pull the o2 sensors and clean them..if you have a k/n air filter clean the electronics on it..then clear codes...and see what happens..
Old Feb 27, 2005 | 01:33 PM
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Default RE: ENGINE RUNNING LEAN

i would clean the code before i buy a AFPR or fuel pump to see if it was just a stored code
Old Feb 27, 2005 | 01:45 PM
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Default RE: ENGINE RUNNING LEAN

Had you done any mods before the lean codes came up? Might just be a dirty MAF sensor.
Old Feb 27, 2005 | 02:21 PM
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Default RE: ENGINE RUNNING LEAN

depending on your mods you might need a AFPR and need to turn up the fuel pressure
Old Feb 27, 2005 | 02:56 PM
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Default RE: ENGINE RUNNING LEAN

lets see here.. clean the electronics on the k&N ... do u mean like the connections on the two sensors? .. if the maf is dirty everyone says not to clean it so what the **** do u do with it ? im gunna clear the codes.. how do u clear them? if they come back then ill clean the **** out of everything.. and get a afpr.
Old Feb 27, 2005 | 04:02 PM
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Default RE: ENGINE RUNNING LEAN

Everyone has their own ideas on how to clean the MAF. I used heavy duty brake cleaner (non-residue) and I haven't had any probs. But to each his own. I cleared my codes by unhooking battery for 30 minutes or so.
Old Feb 27, 2005 | 04:03 PM
  #9  
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Default RE: ENGINE RUNNING LEAN

The part to clean is the 2 exposed very fine wires located inside the meter itself.
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