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

Car shakes very rough after starting

  • Thread starter Thread starter squares98
  • Start date Start date Jan 3, 2005

squares98

Member
Aug 20, 2004
852
0
17
Orange,ca
Jan 3, 2005
#1
  • Jan 3, 2005
  • #1
If I dont run my car for a few days it will hesitate really bad and shake like an old muscle car for a minute. Then it will idle somewhat rough(almost a missing sound) for 5 minutes or so before smothing out to normal, i have 106k miles but it did it when i had 50k miles too. Its has never been a major issue I would just like to know if there is somthing I am overlooking.

50-55 degrees F
 

triggz

Founding Member
May 15, 2002
1,218
0
37
Gadsden, AL
Jan 3, 2005
#2
  • Jan 3, 2005
  • #2
It's misfiring. Mine did it too, the problem went away with a predator tune.

Have you done regular maintennance to it? (Plugs, wires, coils, filters, etc?)
 

VDunn

New Member
Jul 29, 2004
32
0
0
Louisville, KY
Jan 3, 2005
#3
  • Jan 3, 2005
  • #3
Ummm... i'm going to say motor mounts. If it rides rough and idles rough it is the motor mounts. I just had mine replaced and the car feels 10x stronger. You will feel a little hesitation from the engine when it is not seated correctly.
 
M

mustangman2000

Founding Member
Dec 31, 2001
139
0
0
Pittsburgh
Jan 3, 2005
#4
  • Jan 3, 2005
  • #4
VDunn said:
Ummm... i'm going to say motor mounts. If it rides rough and idles rough it is the motor mounts. I just had mine replaced and the car feels 10x stronger. You will feel a little hesitation from the engine when it is not seated correctly.
Click to expand...


Why would it be motor mounts if the engine runs smoothly once it warms up? I am sorry but that makes no sense.

I would recommend to replace your coolant temp sensor. I had the same problem and it cleared it right up.
 
C

Chopper1

New Member
Jan 2, 2005
91
0
0
Wv
Jan 3, 2005
#5
  • Jan 3, 2005
  • #5
squares98 said:
If I dont run my car for a few days it will hesitate really bad and shake like an old muscle car for a minute. Then it will idle somewhat rough(almost a missing sound) for 5 minutes or so before smothing out to normal, i have 106k miles but it did it when i had 50k miles too. Its has never been a major issue I would just like to know if there is somthing I am overlooking.

50-55 degrees F
Click to expand...
This could be due to carbon deposits on the intake valves.This happens because the fuel soaks into the deposits untill they warm up enough to boil the fuel off the backs of the valves.A lot of stop and go driving causes this.Does the car start right up or does it take a few turn-overs to start?You could try a few doses of injector cleaner run thru the engine but a few hours of highway driving will work just as well.My Wife's minivan does the same thing every once in awhile and I just drive it to work for a couple of days and it clears right up.
 
You must log in or register to reply here.

Similar threads

S
Car shakes when taking off help???
  • STANKYstangs
  • May 10, 2026
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
12
Views
305
1996 - 2004 SN95 Mustang -General/Talk- May 27, 2026
LILCBRA
A
Rough idle - cylinder 1 and 6 misfire HELP
  • austindavies935
  • Jul 24, 2025
  • SN95 4.6L Mustang Tech
Replies
12
Views
703
SN95 4.6L Mustang Tech Jul 24, 2025
gkomo
F
Spark Plugs Caused Rough Idle & Driving
  • firevert
  • Sep 1, 2025
  • 2005 - 2009 Specific Tech
Replies
3
Views
405
2005 - 2009 Specific Tech Sep 3, 2025
Noobz347
0
Engine Multiple o2 sensor codes, car runs terrible
  • 02newedge
  • Jun 12, 2025
  • SN95 4.6L Mustang Tech
Replies
5
Views
515
SN95 4.6L Mustang Tech Jul 19, 2025
squeak93
8
Engine Rough idle and aggressive sputtering when accelerating
  • 88vertible
  • Aug 13, 2025
  • Fox 5.0 Mustang Tech
Replies
4
Views
1K
Fox 5.0 Mustang Tech Dec 13, 2025
Jarhead67
J
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?