4.6L General Discussion This section is for non-tech specific information pertaining to 4.6L (Modular) Mustangs built from 1996 to 2004.

rough starting

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Old Oct 23, 2008 | 07:19 PM
  #1  
abingdonmustangs08's Avatar
abingdonmustangs08
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Default rough starting

The last week or so My 2002 GT has been starting a little rough.\
What i mean is it seems to crank longer than usual, only when it's been sitting and the motor is cold. What could be causing this??????

Any help would be appreciated...
Old Oct 23, 2008 | 09:52 PM
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Originally Posted by abingdonmustangs08
The last week or so My 2002 GT has been starting a little rough.\
What i mean is it seems to crank longer than usual, only when it's been sitting and the motor is cold. What could be causing this??????

Any help would be appreciated...
where would you like to start, the first thing i would do is put a fuel pressure gauge on it and see if the pressure is bleeding off while its sitting, if it looses pressure it must first prime the line before it builds enough pressure to fire the injectors before the car will start, therefore causing the extended crank. how does it run after it fires up?
Old Oct 24, 2008 | 02:20 PM
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Once i start it up it runs great. I was thinking the same thing with fuel pressure, just don't have one.
Old Oct 24, 2008 | 05:23 PM
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My 03 takes a little cranking on a cold morning to start too. Its always been like that though.
Old Oct 25, 2008 | 09:17 AM
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so your thinkin its normal, it has gotten colder in the last two weeks. It's usualy in the upper 30's when I'm leaving in the mornings now.
Old Oct 25, 2008 | 09:24 AM
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Originally Posted by abingdonmustangs08
so your thinkin its normal, it has gotten colder in the last two weeks. It's usualy in the upper 30's when I'm leaving in the mornings now.
Mine has always been like that. When its low thirtys and twentys my transmission is harder to shift too. On a cold morning though it is harder to start, especially being supercharged.
Old Oct 25, 2008 | 09:25 AM
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mine takes a little longer in the cold. i'd say as long as its not progressively getting worse no use spending the extra money
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