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

rough idle?

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Old Feb 23, 2006 | 11:12 PM
  #1  
tcuallstar's Avatar
tcuallstar
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From: Texas
Default rough idle?

ive kind of been noticing a slight miss in my idle (or at least thats what i think it is) i can only feel it when im sitting at idle, and i can feel it slightly in the vibrations in the stick, it doesnt move, and then every once in a while theres a slight vibration. any idea what it might be? where can i go to get my codes checked?
Old Feb 23, 2006 | 11:31 PM
  #2  
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Default RE: rough idle?

I have the exact same car leather everything, but have the mach 1000 it was funny thats what I got on for tonight. I have noticed the last couple of days when im stopped at a light or when I start the car to warm up it like has this slight miss or something. And it wasnt affecting my tach but today I noticed a slight flutter at the tach? I guess when some one posts you I will know what mine is doing. Thats weird im in Houston. with the same Problems.
Old Feb 23, 2006 | 11:33 PM
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BCisme
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Default RE: rough idle?

throw a nice lopey set of cams in there to take your mind off of it.
Old Feb 24, 2006 | 03:15 AM
  #4  
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tcuallstar
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Default RE: rough idle?


ORIGINAL: Gray Sleeper

I have the exact same car leather everything, but have the mach 1000 it was funny thats what I got on for tonight. I have noticed the last couple of days when im stopped at a light or when I start the car to warm up it like has this slight miss or something. And it wasnt affecting my tach but today I noticed a slight flutter at the tach? I guess when some one posts you I will know what mine is doing. Thats weird im in Houston. with the same Problems.
Yea im from houston but up in school in Fort worth, im thinking its just normal but i dunno, thats wierd though that you have the same problem, if you get it resolved then definately PM me and let me know
Old Feb 24, 2006 | 03:28 AM
  #5  
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03greyGT
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Default RE: rough idle?

Ive had my car for about two months now and I have noticed it since they day I bought it. I sit in my car everyday for about an hour on my lunch break and it does the same exact thing. It seems like theres a slight miss or pop every once in a while. Thought it may be an O2 sensor or something, but I think its just the nature of the beast....
Old Feb 24, 2006 | 07:57 AM
  #6  
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BCisme
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Default RE: rough idle?

oh also as far as getting codes checked, most auto parts stores will do it for you, but your check engine light needs to be on or your computer wont give any codes.
Old Feb 24, 2006 | 07:02 PM
  #7  
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Default RE: rough idle?

could be you need a new feul filter, cuz my car kinda held an idel funny it would kinda go up n down a lil, and then it wood take excess cranking of the key or a lil gas need to be applied to turn it on, but i put a new feul filter in there, idols perfect, car starts on the drop of dime it runs great! you can get a new feul filter for like 7 bux at ur local auto zone, also they do check codes for free. hope this helps, id try replacing plugs and wires to, im bout to by new plugs in the next couple a days
Old Feb 25, 2006 | 01:27 AM
  #8  
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Jglisson
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Default RE: rough idle?

Have you washed your engine bay lately? An idle misfire can be caused by wet COP boots. Pretty common actually....

Unlike most COP misfires that occur during a low rpm load, wet boots will cause misfires at idle with no load.
Old Feb 25, 2006 | 01:31 AM
  #9  
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03redGT
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From: Tucson, AZ
Default RE: rough idle?

check your plugs too, maybe one of them crapped out. sounds similar to the problem redroller is having. i explained it to him in that post
Old Feb 25, 2006 | 05:04 PM
  #10  
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tcuallstar
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From: Texas
Default RE: rough idle?

yea ill probably get on that as soon as i have the time and energy to get underneath my car and mess with it, im thinking im gonna go get some mystery oil, (grey sleeper PMed me and said hed talked to alot of people about it and said it was good stuff. what do yall think?
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