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Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 35858
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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1997 ford explorer: the coil still no spark

Resolved Question:

1997 ford explorer no spark! replaced the coil still no spark. odley it worrked for about a month,then no spark again please help
Submitted: 9 years ago.
Category: Ford
Expert:  Ron replied 9 years ago.


Thank you for asking your question on Just Answer.

Turn the key to the run position and look for the Check Engine Light to come on. Also get a scanner on it and see if there is RPM on DATA while cranking. The Check Engine Light should also go out while cranking. if the light stays on or there is no rpm on DATA, go to the crank sensor and check for AC output while cranking. It should read about 1.0v or more. Replace the crank sensor as needed.

Crank Sensor output is tied to cranking speed. Make sure that the battery is fully charged before testing crank sensor output. Ford spec is 0.50v or more, normal is 1.0v AC or more with a good battery.


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