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 04-01-2009, 08:18 PM
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BlackStallion5.0
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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!
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Old 04-01-2009, 08:25 PM
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turbosha
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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
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Old 04-01-2009, 08:27 PM
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mjr46
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did this prob exist before the mods you made?? if not what all mods did you do??
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Old 04-01-2009, 08:28 PM
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turbosha
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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.
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Old 04-01-2009, 08:29 PM
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wow i thought it didnt post. my bad
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Old 04-01-2009, 10:55 PM
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camaroeater
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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.
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Old 04-02-2009, 09:56 AM
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BlackStallion5.0
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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!
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Old 04-02-2009, 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
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Old 04-02-2009, 05:25 PM
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http://sbftech.com/index.php/topic,1031.0.html

i used this and worked perfect
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Old 04-02-2009, 07:23 PM
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mjr46
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the stickey's here also have the procedure I believe
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