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.

idle problem, code help!

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Old Mar 5, 2008 | 02:43 PM
  #1  
1fastsedan's Avatar
1fastsedan
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Joined: Mar 2007
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Default idle problem, code help!

i put a 91 5.0 in my boat and i am having issues with the idle. i pulled codes and here is what came up 31,67,81,82,84,85. i am not running smog so i know 31,84,85 are for that reason. but will this effect the way the engine runs? is my IAC bad, i purchased brand new. how about 67 nuetral safety, will this effect idle? how far does the air filter have to be from the maf sensor? thanks
Old Mar 5, 2008 | 07:55 PM
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aode08
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Joined: Oct 2005
Posts: 4,616
From: Ohio USA
Default RE: idle problem, code help!

ORIGINAL: 1fastsedan

i put a 91 5.0 in my boat and i am having issues with the idle. i pulled codes and here is what came up 31,67,81,82,84,85. i am not running smog so i know 31,84,85 are for that reason. but will this effect the way the engine runs? is my IAC bad, i purchased brand new. how about 67 nuetral safety, will this effect idle? how far does the air filter have to be from the maf sensor? thanks
the neutral switch is one issue, computer dont know what gear your in adjust idle/timing.

the air filter has to be at least 6 inches or so from MAF, AND the Maf has to be mounted vertically straight up position.

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