2003 ford mustang gt loss of power and acceleration when warmed up. - MustangForums.com



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Old 08-10-2017, 10:40 PM   #1
Luisdonaldo1
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Default 2003 ford mustang gt loss of power and acceleration when warmed up.

Hi i have a 2003 ford mustang gt that loses power when it warms up and it take a lot of time to pick speed from a stop. When it's cold it runs fantastic but as soon as it's warmed up and it's been driven around for a while it loses acceleration and power. I would appreciate it if someone could please hell me out.
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Old 08-11-2017, 01:30 AM   #2
99GTvert
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How many miles are on it? What maintenance was done on the car? Spark plugs? Any leaks under the hood?
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Old 08-11-2017, 04:36 AM   #3
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Inspect and clean the MAF.
If the car runs better when cold or in the rain it's definitely the culprit.
Does it stutter or buck when you hammer on it when it's warmed up?
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Old 08-11-2017, 08:38 AM   #4
Luisdonaldo1
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Default Maintenance is up to date

99gtvert It has 152,740 miles on it I ha e kept the maintenance up to date with oil changes every 6 to 7 thousand miles, I have msd spark plugs and there is no leaks under the hood what so ever.
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Old 08-11-2017, 08:40 AM   #5
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Default New maf

Baddog I just put a brand new MAF and an eye valve as well and it does kind of buck down when I hammer it but it doesn't stutter
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Old 08-11-2017, 09:41 AM   #6
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Default What is a culprit?

I don't know what a culprit is so could you tell me what that is?
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