I have a Toyota Camry 91 that shakes a lot when the car is in drive and is stopped but it is fine when its stop in neutral or park, or when the car is moving. The place I took it to get the oil changed and look at the problem says that one of the cylinders is missing firing due to a weak secondary ignition. Does this make sense? If it was missing firing would it happened only when its in drive and not moving? The place wanted $214 to fix the problem but I wanted to save some money and do some things myself. Got any ideas of what I should do next? I have some electronic background and a multimeter if it helps. Thanks.

 

You should take your car to a different repair facility for a second opinion. Have them try rotating the tires front to back. Sometimes the tires can make a slight pull even if the car is in alignment.
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Racepages

 

The shaking is the worst when the car is not moving at all so none of that should matter.

 

What is the idle speed when in Park, Neutral, Drive.

 

It seems about the same can't tell. I don't have a tachometer in my car to see the RPMs.

 

Do not understand.

Is this a 4 cylinder or V6?

This engine should have only one coil for all cylinders.

4 cylinder primary coil resistance = 0.38-0.46 ohm. Secondary = 7.7k to 10.4K.

V6 primary = 0.41-0.50 ohms, secondary = same are 4 cylinder.

Plug wire reistance = 15K max.


For $214 you can buy the parts yourself and replace the coil, plugs, plug wires, cap and rotor.