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Vibrate When "D": Engine Coil Faulty?
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<blockquote data-quote="defcon1" data-source="post: 1394766" data-attributes="member: 30064"><p>It's difficult to answer you based on your description. I need to know a few more things first...</p><p></p><p>a) Did you experience any of these vibrations or jerking before you changed the spark plugs? Engine coils (our car has 6...) do not come about all of a sudden. You feel some intermittent misfiring first...and it carries on that way for a long time. Vibration and jerking immediately after changing plugs suggests to me that you may be using the wrong rating of spark plug. I'll post the specific rating later when I get home. I think I have a set of stock Nissan plugs in the house.</p><p></p><p>If you put in plugs that are too "cool"...your ignition will not be smooth, and you will misfire. You will feel it at low rpm's and low speed, cos your alternator is moving slowly and your car is not building charge as fast as when your car is on the move.</p><p></p><p>b) The vibration in your steering...only when you move slowly or also when stationary? I need to know this. It is very possible that something may be wrong with your drive shaft...try getting your mech to regrease the drive shaft joint first and see if it improves. But the more likely reason would be that your lower arm bushings and/or are worn out and have to be replaced.</p><p></p><p>Please understand that it is extremely difficult to diagnose your problems based on your description. Even the type of vibration is important.</p><p></p><p>If you are around Subang Jaya (weekend) or Kelana Jaya (working day), give me a call and we can meet for lunch. Then I can test drive it and determine where the problem maybe coming from.</p></blockquote><p></p>
[QUOTE="defcon1, post: 1394766, member: 30064"] It's difficult to answer you based on your description. I need to know a few more things first... a) Did you experience any of these vibrations or jerking before you changed the spark plugs? Engine coils (our car has 6...) do not come about all of a sudden. You feel some intermittent misfiring first...and it carries on that way for a long time. Vibration and jerking immediately after changing plugs suggests to me that you may be using the wrong rating of spark plug. I'll post the specific rating later when I get home. I think I have a set of stock Nissan plugs in the house. If you put in plugs that are too "cool"...your ignition will not be smooth, and you will misfire. You will feel it at low rpm's and low speed, cos your alternator is moving slowly and your car is not building charge as fast as when your car is on the move. b) The vibration in your steering...only when you move slowly or also when stationary? I need to know this. It is very possible that something may be wrong with your drive shaft...try getting your mech to regrease the drive shaft joint first and see if it improves. But the more likely reason would be that your lower arm bushings and/or are worn out and have to be replaced. Please understand that it is extremely difficult to diagnose your problems based on your description. Even the type of vibration is important. If you are around Subang Jaya (weekend) or Kelana Jaya (working day), give me a call and we can meet for lunch. Then I can test drive it and determine where the problem maybe coming from. [/QUOTE]
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Vibrate When "D": Engine Coil Faulty?