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Old 02-09-2015, 02:14 PM   #1
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1999 Mustang shaking real bad

My 1999 Mustang 5 speed is shaking really bad. The whole car shakes. I just had the engine and tranny mounts replaced. The car does not throw any codes. The whole car shakes whether it's in neutral or being driven. Can someone help me? I have taken it to three different shops and no one can tell me what is wrong with it.
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Old 02-09-2015, 06:59 PM   #2
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Driveshaft?
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Old 02-10-2015, 06:58 AM   #3
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That was checked. Someone else said maybe the harmonic balancer.
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Old 02-14-2015, 01:50 AM   #4
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Harmonic balancer or fly wheel and despite no codes get a tester and make sure all cylinders are firing!


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Old 02-16-2015, 07:43 PM   #5
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I had a vibration in neutral and while driving at rpm around 1500 to 2000 in 2nd and 3rd gear, I changed spark plugs, wires and coil pack "they were already factory original and needed change", vibration was still there, I changed the harmonic balancer couple months ago and 90% of the vibration is gone now!
I prefer you first go through all the possibilities before changing the harmonic balancer just to make sure not to spend money for nothing.
Even if you don't have a code for miss fire you still have to check for that!


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