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94 gt motor mounts or Harmonic Balancer??

5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

94 gt motor mounts or Harmonic Balancer??

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Old 02-27-2016, 10:42 AM
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colts0455
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Default 94 gt motor mounts or Harmonic Balancer??

just picked up 94 gt & when i rev it up past 1000 & it goes back down has bad shaking ? read that it could be motor mounts or Harmonic Balancer. people i got it from says had new balancer put on it looks new but idk ? & ive not yet done tune up but it feels like more than a tune up to me. just trying to see if i should put alot of money into it or i should move on, i got it at a pretty good price.
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Old 02-27-2016, 10:42 AM
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Old 02-27-2016, 10:43 AM
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Old 02-27-2016, 10:43 AM
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Old 02-27-2016, 10:44 AM
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1st 2 videos are of balancer & 3rd is something i seen looks cut with bolt pushed down into it ?
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Old 02-27-2016, 10:50 AM
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Balancer looks good, that bolt is just plugging the egr tube nothing to worry about unless its leaking exhaust.

Vibrations most likely due to a miss fire. Plugs,wires,cap,rotor. Pull codes http://www.dfwmustangs.net/forums/showthread.php?t=7908 also run optional cylinder balance tests as shown in link.
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Old 02-27-2016, 11:19 AM
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colts0455
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would it be shaking that bad coming down rpms due to a miss fireneeding Plugs,wires,cap,rotor so on dont feel like a miss fire just bad shaking & im looking over codes im new to whole code thing lol
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Old 02-27-2016, 11:22 AM
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dawson1112
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Originally Posted by colts0455 View Post
would it be shaking that bad coming down rpms due to a miss fireneeding Plugs,wires,cap,rotor so on dont feel like a miss fire just bad shaking & im looking over codes im new to whole code thing lol
Yes a bad miss due to faulty plus/wires cap/rotor will shake bad especially as RPMs increase. It could even start to loose spark as RPMs increase.
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Old 02-27-2016, 12:21 PM
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636 - TOT sensor voltage out of self test range
117 - ECT Sensor Circuit Below Minimum Voltage of 0.2 volts(O), ECT circuit has intermittently failed below minimum 0.2 volts (CM)
217 - EEC detected coil 3 primary circuit failure
332 - EGR valve opening not detected
172 - o2 Sensor sensor circuit indicates system lean (right side)
177 - o2 Sensor circuit indicates system rich (left side)
181 - Right side still lean, at richest adaptive limit, during part throttle
189 - Left side still lean, at richest adaptive limit, during part throttle
116 - ECT out of self test range 0.3 to 3.7 volts
313 - Thermactor air not bypassed during self test
311 - Thermactor air system inoperative (right side)
332 - EGR valve opening not detected
536 - Brake On/Off circuit failure / switch not actuated during KOER test
632 - Overdrive cancel switch not changing state (E4OD)


cylinder balance test 9
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Old 02-27-2016, 12:21 PM
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codes was going fast my 1st time but im pretty sure i got them all are those bad ? note car has not had tune up in dk how long.
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