This is topic how to check if coils are bad. non ford in forum Tech Talk at Northern California Ford Owners  .


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Posted by NvrGoFullRetard (Member # 1633) on :
 
Mazda protege 5 2003.
How do i check if a coil is bad. I replaced the spark plugs and wires. The hesitates to go from a stop. And before anyone ask ive replaced the fuel pump a year or 2 ago also.
 

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Posted by NvrGoFullRetard (Member # 1633) on :
 
Anyone
 

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Posted by wilit (Member # 3367) on :
 
Is it tripping a fault code with a misfire or just stumbling?
 

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Posted by SacStangDriver (Member # 8304) on :
 
swap the coil from one cylinder to another. if the misfire code comes up on the cylinder you just put it to. you know its bad.
 

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Posted by Adam5.0 (Member # 6995) on :
 
The best way to test a coil is with a lab scope. Assuming you don't have that you can test the resistance with an ohm meter. You would have to figure out the specs of the primary and secondary side
 

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Posted by Tom Renzo (Member # 13165) on :
 
If the coil was bad you would get a SES light with a misfire code. If memory serves me that is a waste fire setup. Either way do you have a SES light and codes
 

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Posted by NvrGoFullRetard (Member # 1633) on :
 
Yes it had a random missfire code cylinder 1. P301 i believe. I changed the plugs and wires. Now it has a hesitation when you leave from a complete stop. I know these motors are garbage but its basically a commuter car.
 

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Posted by hidnn0s (Member # 13845) on :
 
Not a crappy car, good beater! Swap cyl 1 coil and see if code follows to a new cylinder. If the misfire doesn't change cylinders and the spark plug isn't loose (check) then do a LD/Comp test on cylinder 1
 

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