How to test fuel injector and coil pack in cylinder one? how do I hook up a voltmeter?
Nov 26, 2021 at 11:59 PM
Code P0301, misfire in cylinder one
2008 DODGE NITRO
JEPWO6
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Good morning,
I would start by checking the compression to be sure nothing is wrong with the cylinder. The compression should be 140-160 pounds.
https://www.2carpros.com/articles/how-to-test-engine-compression
As far as the testing. You need a test light, not a voltmeter for checking the injector. You need to check for voltage at both wires to the injector with the key in the on position.
https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester
https://www.2carpros.com/articles/how-to-use-a-voltmeter
https://www.2carpros.com/articles/how-to-test-a-fuel-injector
As far as the coil, you need a scope to test the output of the coil. You could try and switch with another cylinder and see if the miss travels to that cylinder.
Do the compression test first.
Roy
I would start by checking the compression to be sure nothing is wrong with the cylinder. The compression should be 140-160 pounds.
https://www.2carpros.com/articles/how-to-test-engine-compression
As far as the testing. You need a test light, not a voltmeter for checking the injector. You need to check for voltage at both wires to the injector with the key in the on position.
https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester
https://www.2carpros.com/articles/how-to-use-a-voltmeter
https://www.2carpros.com/articles/how-to-test-a-fuel-injector
As far as the coil, you need a scope to test the output of the coil. You could try and switch with another cylinder and see if the miss travels to that cylinder.
Do the compression test first.
Roy
Nov 27, 2021 at 7:49 AM
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I don’t think it is a compression problem because the misfire started right after I had the sparks plugs changed.
Nov 27, 2021 at 10:49 AM
I would still start there.
Roy
Roy
Nov 29, 2021 at 6:46 AM