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.

won’t start when col

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Old 11-27-2003, 04:24 PM
  #1  
morris
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1990 5.0 HO 20,000 miles on rebuild, starts easily, runs great except when the temperature drops below 30 degrees. Then it will start for 2 seconds or so and quit. Virtually impossible to start. New fuel pressure regulator, new ACT, new ECT, new TP Sensor, 36# fuel pressure. Any suggestions?
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Old 11-27-2003, 05:39 PM
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BoostedStallion
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buy a different car for when it gets that cold out.<IMG src=smileys/smiley4.gif border="0"></P>
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Old 11-28-2003, 04:31 AM
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johnc
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Default won’t start when col

Doesn't the fuel pump shut down when it has no oil pressure? I think you get an initial "shot" during cranking to start, then the pump needs an oil pressure signal to keep running. Cold temp and sluggish oil pressure build-up? Maybe a pressure sensor problem? Dunno how to check that-not sure if you want to ground the wire or not. Hair dryer and warm the oil pan to see if it goes away?<IMG src=smileys/smiley19.gif border="0">
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Old 12-01-2003, 12:00 AM
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tyybo
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welll before you take out your wallet try converting to synthetic oil and use ethanol gasoline, if you dont have access to ethanol, then just put 2 bottles of heet in every tank, i dunno it helped mine and it gest pretty damn cold in north dakota</P>
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Old 12-01-2003, 12:27 AM
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Pitviper100
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Default won’t start when col

or just buy another car for the winter
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