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Hesitation/stumbling (whatever you want to call it)

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Old 04-29-2008, 01:35 PM
  #1  
04GTMustangRob
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Default Hesitation/stumbling (whatever you want to call it)

Well, i am trying to diagnose what the hell is wrong with my car.I havecleaned the maf, iac, new plugs, new tps. there is a hesitation (stumbling) when i am doing an easy acceleration or just maintaining a certain speed. but under a quick accel (WOT) the car does fine.

also i notice that when the car hesitates, my fuel pressure guage tends to bounce around as well. any thoughts??

http://s307.photobucket.com/albums/n...t=HPIM0553.flv

http://s307.photobucket.com/albums/n...t=HPIM0554.flv
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Old 04-29-2008, 01:40 PM
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black35th
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Default RE: Hesitation/stumbling (whatever you want to call it)

Have you checked your fuel filter?
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Old 04-29-2008, 01:43 PM
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04GTMustangRob
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Default RE: Hesitation/stumbling (whatever you want to call it)

that's on the list. i have a lot of guys on another site telling me fuel pump or filter though hey are both only a year old. i replaced the filter when i put my sct focus pump in last summer
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Old 04-29-2008, 03:10 PM
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LynnBob Mustang
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Default RE: Hesitation/stumbling (whatever you want to call it)

Have you checked or replaced your COP's?
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Old 04-29-2008, 04:11 PM
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04GTMustangRob
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Default RE: Hesitation/stumbling (whatever you want to call it)

COP's seem fine. i am (along with a lot of people) are looking at it to be in the fuel system. but we will see. i am slowly checking things off the list.
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Old 04-29-2008, 04:40 PM
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Sxynerd
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Default RE: Hesitation/stumbling (whatever you want to call it)

Fuel people either work or they don't...
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Old 04-29-2008, 11:32 PM
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jojo2003
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Default RE: Hesitation/stumbling (whatever you want to call it)

Definatley check your COPs, mine was doing the same thing. I went through the whole fuel systme replacing stuff. When I ran out of stuff to replace, I was suggested to get some new ones, and they fixed it right away.
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Old 04-30-2008, 01:20 AM
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klfutrelle
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Default RE: Hesitation/stumbling (whatever you want to call it)

You got me stumbling! The girl can't help it...The girl can't help it...
Sorry I can't add anything helpful to your post.
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Old 04-30-2008, 02:37 AM
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OUTLAW1969
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Default RE: Hesitation/stumbling (whatever you want to call it)

ORIGINAL: jojo2003

Definatley check your COPs, mine was doing the same thing. I went through the whole fuel systme replacing stuff. When I ran out of stuff to replace, I was suggested to get some new ones, and they fixed it right away.

+1 , AGREED!
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Old 04-30-2008, 12:31 PM
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racemyski
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Default RE: Hesitation/stumbling (whatever you want to call it)

How do you check the COPs?
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