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Eighth generation of the Mazda Protege.

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No spark on 2&3 cylinder

I have a good 12v power and ground at the coil but no pulse.

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Have you tried changing out the spark plugs

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@smitty9448 1.6 or 2.0 engine?

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Yes i have even changed the coil.

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Yes it is a 2.0

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Just to verify, cylinder 1 and 4 have spark but not 2 and 3? You replaced the coil for 2&3? Do you have a meter that can test Hertz? you replaced the plug wires as well?

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3个答案

@smitty9448 If the coil is new, teh wires new and you still have no spark I would suggest you check the wire on connector to your coil to see if you get a signal. You will need a tester that can measure hertz. It is the fuel injection computer that triggers the signal to your coil.

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The hertz inspection is good but I believe on this engine that the Cam Position Sensor signal will be fluctuating from a strong signal to a weak signal as the camshaft bore is probably worn out due to lack of proper maintenance and oil changes. This will show up on a signal trace via an oscilloscope.

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bad Cam Position Sensor or shaft sensor

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John Smith 将永远感激不已
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