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

Car Stuttering in Morning?!

  • Thread starter Thread starter Matt's03GT
  • Start date Start date Jun 22, 2004
M

Matt's03GT

New Member
Oct 28, 2003
5
0
0
Oklahoma
Jun 22, 2004
#1
  • Jun 22, 2004
  • #1
I have an 03 GT manual. The only mods are an offroad X-pipe, o2 mils, short throw shifter, KN Filter, silencer removed.

If I have not driven the car for about 12-14 hours, when I start it and start to drive it stutters for about half a block then just stops. Funny thing is that it reverses fine out of the driveway and as soon as I start to put it under load it stutters for about the first 300 feet.

The car runs absolutley great otherwise. The only problems I have had have been with the CEL. I have an autoscanner and have read the codes every time it comes on. It is always the o2 sensor malfunction code. I erase it as I know the sims are not perfect (anyone know a fix for this)... Then about 3 months later it happens again and I do the little dance...

Any ideas, I am considering putting the silencer back on the air filter as I have read that there could be some downsides to having it removed.... Maybe I should just get new sims...
 
M

Matt's03GT

New Member
Oct 28, 2003
5
0
0
Oklahoma
Jun 22, 2004
#2
  • Jun 22, 2004
  • #2
Mileage

Oh yah, it has about 12,000 miles and started doing this about 3 months ago...

Thanks for any help.
 

Carl

Founding Member
Aug 7, 2000
613
0
0
Johnson City, TN
Jun 22, 2004
#3
  • Jun 22, 2004
  • #3
Mine's been doing that for a long time. If you let it warm up for a minute it doesn't do it. I have narrowed it down to an O2 sensor that isn't heating up fast enough. It's not off enough to throw a code, but if it doesn't heat up fast enough and start switching, then you get stuttering and hesitation until it gets up to it's operating temp.
 

StngStr

Member
Jun 24, 2003
616
0
17
Central Florida
Jun 22, 2004
#4
  • Jun 22, 2004
  • #4
same here. I find that if I rev it up a bit before backing out of the garage it doesn't stutter when I drive down the street. Also, if you let it run for 30 seconds or so, it shouldn't do it.
 
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