4.6 gt 55k seems like it's loosing power - MustangForums.com



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Old 10-20-2013, 04:02 PM   #1
I8urGM
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Default 4.6 gt 55k seems like it's loosing power

I have an 03 gt. Seems like it's running slower, a sec slower in the 1/8. No engine light, no stalling. No noticeable issues. Has anyone had this issue or have an idea what it might be?
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Old 10-20-2013, 04:16 PM   #2
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Run a compression check and see what you have
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Old 10-23-2013, 06:01 PM   #3
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Don't forget the simple stuff, did you get fuel from a different place how long has it been since the fuel filter and or air filters have been changed, it may surprise you how much performance lost you can get with dirty/old filters maybe even check the spark plugs
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Old 10-24-2013, 10:01 AM   #4
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Well two months ago i changed my spark plugs with motorcraft plugs, same day i changed the fuel filter. I also changed the air filter for a bbk filter. Ever since then the car struggles to start and doesnt run the same.
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Old 10-24-2013, 06:41 PM   #5
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i would just start with the process of elimination, take the air filter off, go for a ride see if there is any difference, you can put a fuel pressure gauge in (after the filter) and measure the PSI to make sure there are no concern with a clogged filter or fuel pump issue. Pull the plugs and inspect them (could be cracked), make sure the COP are on all the way. Good luck
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Old 10-24-2013, 08:47 PM   #6
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Thanks guys I'm going to try that this weekend. Hopefully it wakes it back up.
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Old 10-24-2013, 09:04 PM   #7
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Not trying to insult you, but did you install the fuel filter in the proper direction? Just trying to help.
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Old 10-24-2013, 09:15 PM   #8
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I hope so lol.
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Old 03-15-2014, 10:38 PM   #9
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Cheak your plugs. May be junk plugs. U pay for what ya get with plugs
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Old 03-16-2014, 06:36 PM   #10
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Hey man good info but this is like a 5 mth old post! Hopefully the OP took care of it by now.
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