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1994 Ford Mustang Engine shaking

Tiny
GERALDT808
  • MEMBER
  • 1994 FORD MUSTANG
  • V8
  • 2WD
  • AUTOMATIC
  • 126,000 MILES
The engine has a notable shake around 1050 rpm. For example, upon starting the car, the rpm goes up and when the rpm moves down to 1050, the engine shakes. It holds there for a few seconds and goes down to idle (around 800rpm), and the engine stops shaking. The shaking is consistent while accelerating and decelerating. I have changed the spark plugs, wires, rotor and cap, air filter.
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Monday, November 1st, 2010 AT 12:49 AM

12 Replies

Tiny
LEGITIMATE007
  • MECHANIC
  • 5,121 POSTS
It still sounds like you may have a spark problem here, I would check both fuel and spark to see where we can narrow this down to. If you dont know how to check it I will send you some instructions, also I wanted to ask, is there a check engine light on?
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Monday, November 1st, 2010 AT 9:31 AM
Tiny
LEGITIMATE007
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https://www.2carpros.com/how_to/how_to_test_an_ignition_system.htm
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Monday, November 1st, 2010 AT 9:33 AM
Tiny
LEGITIMATE007
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https://www.2carpros.com/how_to/how_to_check_fuel_pressure.htm
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Monday, November 1st, 2010 AT 9:34 AM
Tiny
LEGITIMATE007
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Can you actually see the engine shake, or it just feels like its shaking?
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Monday, November 1st, 2010 AT 9:35 AM
Tiny
GERALDT808
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  • 4 POSTS
Thank you.

I can definitely feel the car shaking. As far as seeing it, I THINK I can see the engine shaking. I don't really remember what the movement of the engine looked like before. The check engine light is not on.
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Monday, November 1st, 2010 AT 1:33 PM
Tiny
LEGITIMATE007
  • MECHANIC
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I dont think its as serious as I initially thought, besides the fact that you may need a motor mount, I think a really good throttle body cleaning and Idle air control valve. That will clear you up.
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Monday, November 1st, 2010 AT 9:28 PM
Tiny
LEGITIMATE007
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https://www.2carpros.com/how_to/how_to_tune_up.htm
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Monday, November 1st, 2010 AT 9:29 PM
Tiny
LEGITIMATE007
  • MECHANIC
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Try the cleaning first and we'll take it from there
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Monday, November 1st, 2010 AT 9:30 PM
Tiny
GERALDT808
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  • 4 POSTS
Thank you. I'll try the cleaning and then look at the IAC. Will let you know what I discover.
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Tuesday, November 2nd, 2010 AT 11:38 PM
Tiny
LEGITIMATE007
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Yes, thank you
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Wednesday, November 3rd, 2010 AT 9:13 AM
Tiny
GERALDT808
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  • 4 POSTS
If it is the motor mount, is there a danger if I continue to drive the car?
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Wednesday, November 3rd, 2010 AT 12:30 PM
Tiny
LEGITIMATE007
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Not really, however, you may start to put strain on the others causing pre mature wear, or in one case that I had, the refrigerant pipe ended up cracking because there was so much movement that it put too much strain on the pipe and it gave way. But the engine isnt gonna fall out or anything serious like that
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Thursday, November 4th, 2010 AT 9:23 AM

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