1991 engine shaking

Tiny
BROOKE_LYNN
  • MEMBER
  • 1991 FORD
I have a 1991 Mercury Cougar, mileage 133387, not real sure if that is the correct mileage or not, the engine was replaced in the past but this engine that is in it now shakes really bad, it makes the entire car shake as well! I have tested the compression on the pistons and they all come out to read the same except for one, it comes out diff. Dont remember EXACTLY what the numbers were either. But I was just wondering if I need a ford man to check my car out, does it need a tune up? The engine works fine, I haven't had any troubles with it cranking over or stalling on me. Its just the shaking that bothers me. Have a clue?
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Wednesday, November 22nd, 2006 AT 3:23 PM

3 Replies

Tiny
CATCH_15
  • MEMBER
Check the engine mounts and make sure they are all in good shape and tight.
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Sunday, December 3rd, 2006 AT 11:14 PM
Tiny
BROOKE_LYNN
  • MEMBER
Engine Mounts are good and Secure. Do you think it could be a valve left open?

Another question about the car, when I want to speed up the car doesn't go. I push on the gas, I could have it floored and the car just slowly moves up to speed. I can get up to 30 mph no prob. But when it comes to getting up to speed faster for a highway, it takes forever. I have changed the fuel filter, put in fuel injector cleaner, and nothing seemed to help. Do you think it has something to do with my gas? Or is it the Trany? I have checked the Trany fluid and its fine, hasn't changed since i've got the car!
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Wednesday, December 6th, 2006 AT 10:00 AM
Tiny
MY68MONTERAY
  • MEMBER
I highly doubt its a valve, they control the gas/air intake and exaust output it would cause a miss or bucking. It could possibly be the crankshaft bearings, a worn lobe on the crank, unbalanced driveshaft, or tranny mount. Also check your front body mounts. And as for the sluggishness, there is a good possiblity it is your fuel pump. They tend to do that before they go. Here are 3 signs u need a fuel pump (1) no gas at all going to motor (2) not enough gas getting to motor I.E. Noticeably sluggish *my boyfriend had a probe that wouldn't go over 30mph and the fuel pump needed to be replaced* and (3) car runs fine on flat ground and bucks and dies going up hill*my festiva did this, we had to push it up hills but besides that it ran fine and we had no more problems with a new fuel pump*
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Saturday, November 22nd, 2008 AT 9:06 PM

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