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.

Engine rocking

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Old 09-17-2007, 03:55 PM
  #1  
Asylum839
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Default Engine rocking

Hey guys I havent been on here for a while but I have a 95 cobra and the engine is rocking pretty bad in the engine bay, it has a cam, crane igniton coil, 3.73 gears, full exhaust and some other minor things that I dont think would affect this issue, now I was thinking could this be a motor mount issue or possibly a harmonic balancer?, Im not really sure what it is but does anyone have any idea?
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Old 09-17-2007, 04:04 PM
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shawnk007
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Default RE: Engine rocking

It probably a motor mount. Also, check for misfires.
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Old 09-17-2007, 04:26 PM
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Asylum839
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Default RE: Engine rocking

yeah I really suspected the motor mounts, Hopefully thats the issue, and im almost positive I dont have a misfire but anyway I could check to make sure?
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Old 09-18-2007, 12:55 PM
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shawnk007
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Default RE: Engine rocking

To start.. if you havent done any of this already, it couldnt hurt to do it. Replace the fuel filter. Inspect the air filter and replace or clean if neccesary. Do a full tune up- cap, rotor, plugs, wires, and check the timing. How many miles on your engine? While your plugs are out, do a compression test on every cylinder. Check fuel pressure. Have the fuel injectors cleaned. Check for any vacuum leaks and any vacuum lines that could be old and collapsing. Replace any if neccesary. Clean your MAF sensor with some MAF sensor cleaner. This is just preventive maintainance that should be done on any vehicle out on the road. Keep it simple. But from what you describe, start by inspecting motor mounts and replace if neccesary. A rocking engine can lead to some severe damage.
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Old 09-18-2007, 08:24 PM
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aode08
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Default RE: Engine rocking

your front end rocks
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