4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

sputtering when cold started then fine?

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Old 10-17-2007, 05:49 PM
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ripped camel
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Default sputtering when cold started then fine?

I started the car and it seemed to idle a tad bit rough. When I backed up and accelerated I noticed it was sputtering real bad. Almost as if it was getting gas, then it wasn't. It did this for about a minute until I took it onto the main road and took 1st & 2nd to 5000RPM's. From that point on it ran perfect.

What can cause this to happen? Checked for squirrels and there aren't any. Any other ideas?
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Old 10-17-2007, 06:25 PM
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wmill2009
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Default RE: sputtering when cold started then fine?

the same thing has been happening to me....but i havent figured it out either. but it runs perfect after a minute
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Old 10-18-2007, 08:53 AM
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ripped camel
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Default RE: sputtering when cold started then fine?

Does anybody know why this happens?

I was wondering if maybe tt could be a bad fuel filter, or maybe the plugs need to be replaced.

The only thing that confuses me is that it goes away after a few minutes and doesn't come back again. That's the only thing that sways me from thinking the two solutions above is the fix. If it was a fuel filter or plugs it would be a constant shudder, and wouldn't go away when the car warms up.
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