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.

Help please!

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Old Apr 1, 2009 | 08:18 PM
  #1  
BlackStallion5.0's Avatar
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Default Help please!

Hey guys long time no talk...I got everything I had ordered into my stang now im having some troubleshooting issues. I am having trouble idling after she is hot. When cold I start her up and everything is ok and then like I said Ill shut it down and then go to start it up again I have to keep my foot on the gas to keep her goin. I adjusted the tps and its right where it should be .98 but the problem is persisting. Would a adjustable fuel pressure reg do the trick? Any other suggestions? Thanks in advance!
Old Apr 1, 2009 | 08:25 PM
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did you disconnect the battery when you changed t.b?may need to set base idle, then t.p.s voltage.a bigger t.b will cause a lean condition. an adjustable f.p reg. would be a good idea. along with a f.p gauge
Old Apr 1, 2009 | 08:27 PM
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did this prob exist before the mods you made?? if not what all mods did you do??
Old Apr 1, 2009 | 08:28 PM
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did you dissconnect the battery when replacing t.b? you will have to set the i.a.c and base idle. then check t.p.s voltage.a bigger t.b will cause some lean issues. so an adjustable one and a gauge would be good also.
Old Apr 1, 2009 | 08:29 PM
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wow i thought it didnt post. my bad
Old Apr 1, 2009 | 10:55 PM
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I had the same problem starting up when hot. The idle would go down and up for a second a die. I performed a base idle reset and it idles perfect at 750rpms now.
Old Apr 2, 2009 | 09:56 AM
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So the best course of action would be to go with the adj fuel pressure reg? if not how do i set the base idle and adjust the iac? thanks!
Old Apr 2, 2009 | 09:58 AM
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also i have some mods but nothing serious...just an ac elim, cai, and the 65mm tb and egr spacer as far as under the hood
Old Apr 2, 2009 | 05:25 PM
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http://sbftech.com/index.php/topic,1031.0.html

i used this and worked perfect
Old Apr 2, 2009 | 07:23 PM
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the stickey's here also have the procedure I believe




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