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  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

hesitation/stumble....help

  • Thread starter Thread starter 97yelstang
  • Start date Start date Aug 26, 2006

97yelstang

Member
Sep 12, 2004
43
0
6
Schuykill Haven, PA
Aug 26, 2006
#1
  • Aug 26, 2006
  • #1
ok my car has approx. 100k on it and i just replaced the iac and it ran fine
now whenever i'm at a cruise or leave my foot at the same spot on the throttle for a long period of time, the car will start to hesitate and stumble but the second i jump on it ..it has instant throttle response and and power is like it should be
but as i said b4 if i'm just cruising and leave my foot in the same spot it will start the buck and hesitate and stumble but then i hammer it and its fine ...until i back off the thottle and just cruise again.......*now occasionally it will hesitate when i rip on it, but that is only once in a while
today i'm gonna change the plugs but i know thats not the problem and fuel filter was done , not too long ago
i would appreciate any info thx
 
K

Kilgore Trout

Fried or Broiled ?
10 Year Member
Mar 30, 2005
4,749
95
134
Aug 26, 2006
#2
  • Aug 26, 2006
  • #2
I suggest you SeaFoam and reset the PCM while you are working on it today also.
 

Mike97gt

it doe snot
Founding Member
Jan 26, 1999
10,633
7
89
the people's republic of massachusetts
Aug 26, 2006
#3
  • Aug 26, 2006
  • #3
99 percent of the time I find this to be the plugs. get some stock replacement motorcrafts..
 

BMan5150

Founding Member
Feb 19, 2002
309
0
16
Columbus, OH
Aug 27, 2006
#4
  • Aug 27, 2006
  • #4
DPFE sensor? I believe this is the sensor that regulates EGR - since you're having a problem at partial steady throttle but it's fine at WOT and you've already replaced the EGR valve, this might be your prob.

Check/change the plugs, then give this a try.
 

03ghoststang

Well-Known Member
Jul 16, 2005
1,930
1
57
Los Angeles, California
Aug 27, 2006
#5
  • Aug 27, 2006
  • #5
svttech76 said:
99 percent of the time I find this to be the plugs. get some stock replacement motorcrafts..
Click to expand...


i agree with mike, but when was the last time you changed the plugs
 

squares98

Member
Aug 20, 2004
852
0
17
Orange,ca
Aug 27, 2006
#6
  • Aug 27, 2006
  • #6
Kilgore Trout said:
I suggest you SeaFoam and reset the PCM while you are working on it today also.
Click to expand...
It worked when I had the same problem, but I think my plugs had buildup on them from all the horrid tuning early on.
 
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