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

98 cobra shaking at low RPMS

  • Thread starter Thread starter pauliac
  • Start date Start date Apr 8, 2007
P

pauliac

New Member
Nov 23, 2006
6
0
0
Apr 8, 2007
#1
  • Apr 8, 2007
  • #1
anytime i'm at low RPMs (between 1000-2000) my cobra shakes and doesn't really accelerate as fast as it should. after about 2000 it's fine though, no shaking. I was going to check the plugs, but I wanted to know what else i should check for.

Also, my car idles at slightly higher than 1000 rpm. This seems a little high to me, so I was wondering if that's normal. that may or may not be related to the shaking.
 

Gearbanger 101

Straight Outta Locash
20+ Year Stangneter
Aug 10, 2002
9,457
1,377
234
Ontario, Canada
Apr 8, 2007
#2
  • Apr 8, 2007
  • #2
Does it shake in gear, or at idle...or both? Could be a lot of things. Bad plugs, wires, coil pack, dirty injector, worn out crank shaft dampener, etc.

High idle might be a dirty T/B or a vacuum leak?
 
P

pauliac

New Member
Nov 23, 2006
6
0
0
Apr 8, 2007
#3
  • Apr 8, 2007
  • #3
Gearbanger 101 said:
Does it shake in gear, or at idle...or both? Could be a lot of things. Bad plugs, wires, coil pack, dirty injector, worn out crank shaft dampener, etc.

High idle might be a dirty T/B or a vacuum leak?
Click to expand...
it just shakes in gear, for example, if i'm cruising at about 50MPH in 5th gear, and i try to accelerate to 65, it will do the whole shaking bit.

I can probably check the throttle body, but what's a vacuum leak?
 

Mike97gt

it doe snot
Founding Member
Jan 26, 1999
10,633
7
89
the people's republic of massachusetts
Apr 8, 2007
#4
  • Apr 8, 2007
  • #4
pauliac said:
it just shakes in gear, for example, if i'm cruising at about 50MPH in 5th gear, and i try to accelerate to 65, it will do the whole shaking bit.

I can probably check the throttle body, but what's a vacuum leak?
Click to expand...

most likely it's a ignition related misfire.. plugs and wires are the most common causes of this on your car.. also check the coils for small cracks, a lot of times when they go bad they crack.
 
You must log in or register to reply here.

Similar threads

A
Rough idle - cylinder 1 and 6 misfire HELP
  • austindavies935
  • Jul 24, 2025
  • SN95 4.6L Mustang Tech
Replies
12
Views
697
SN95 4.6L Mustang Tech Jul 24, 2025
gkomo
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
H
Hanging idle issues
  • HydraX
  • Mar 22, 2025
  • SVT Tech Forum
Replies
5
Views
569
SVT Tech Forum Aug 4, 2025
squeak93
1
Engine 91 mustang 302 Low acceleration car backfires pops and acts like it doesn’t want to take fuel
  • 1991Fox5.0
  • Oct 4, 2025
  • Fox 5.0 Mustang Tech
Replies
16
Views
1K
Fox 5.0 Mustang Tech Oct 6, 2025
1991Fox5.0
1
B
'03 GT Fuel Pump/Pressure/Delivery Issue
  • Brodach
  • Oct 21, 2025
  • SN95 4.6L Mustang Tech
Replies
8
Views
880
SN95 4.6L Mustang Tech Oct 31, 2025
gkomo
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?