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Join Date: May 2008
Location: Great Mills, MD
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Jaggy, normally when you have something like this, it is either a cylinder not completely firing or one of your motor mounts has given up and what you are feeling is the block resting directly on the frame of the car. You don't feel it at power as the motor will be lifted slightly due to the torque of the motor.
If it is a misfire (incomplete firing), you can normally cause it to throw a code by doing a hard acceleration up to about 60 mph. Unfortunately, the only other way to determine which cylinder is acting up is to pull the plugs and then hopefully you will have one that has has a lot more carbon buildup on it than the others. From there, your best bet is to replace the plug and coil at the same time to eliminate all possibilities.
If you need more help, let me know.
If it is a misfire (incomplete firing), you can normally cause it to throw a code by doing a hard acceleration up to about 60 mph. Unfortunately, the only other way to determine which cylinder is acting up is to pull the plugs and then hopefully you will have one that has has a lot more carbon buildup on it than the others. From there, your best bet is to replace the plug and coil at the same time to eliminate all possibilities.
If you need more help, let me know.
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Jaggy Jag (04-15-2012)
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Replacing motor mounts isn't hard as long as you have some necessary tools. Sometimes you can get away with a floor jack. Other times you may need a cherry picker to lift up on the engine (remember, you are removing the pieces that support the engine). It all depends on which mount is bad as to how easy/difficult it is. Normally the 2 mounts on the sides of the motor are your troublesome ones as these two support a majority of the weight.
Granted, you may want to look at what is touching the block since if something got pushed slightly, it may be contacting the body, leading to the vibration. But, under load, it will be flexed far enough out of the way that it will not make contact.
Granted, you may want to look at what is touching the block since if something got pushed slightly, it may be contacting the body, leading to the vibration. But, under load, it will be flexed far enough out of the way that it will not make contact.
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Chuck Schexnayder
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