mschrom51
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- 6.4 hemi
# 7 cylinder is not getting power for the spark? how to trace back wiring to find problem?
2017 6.4 hemi 3500
- Thread starter mschrom51
- Start date
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mschrom51
Junior Member
- Joined
- Jul 4, 2024
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- 2
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- Location
- lawrence michigan
- Ram Year
- 2017
- Engine
- 6.4 hemi
Thank you for the response. i have not but will and let you know
Choupique
Senior Member
It's going to sound like a sarcastic response, but start at the spark plug and go backwards.
Good advice above to swap the coils around and see what happens. Odds are its just a bad coil.
Good advice above to swap the coils around and see what happens. Odds are its just a bad coil.
Dean2
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How do you know that plug is not firing? Have you put a spare plug into the plug wire and made sure the cylinder is not firing for sure or are you reading a misfire code on OBD faults. Could be a bad plug, or bad plug wire, if not the coil. Not really anything else that would affect only one cylinder, unless that cylinder is not getting fuel and the plug is actually firing.
62Blazer
Senior Member
Same question as above....what diagnostics have you performed and what makes you say the coil has no power? Have you actually checked power at the coil?
Easiest thing is to swap coil between two adjacent cylinders. If the problem stays at #7 then not the coil. If #7 returns to normal and the issue moves to the other cylinder than probably the coil. The only reason I say "probably" is that you have disconnected and reconnected the coil....so make sure the connection is simply not bad or you have a cut in the wiring somewhere.
Easiest thing is to swap coil between two adjacent cylinders. If the problem stays at #7 then not the coil. If #7 returns to normal and the issue moves to the other cylinder than probably the coil. The only reason I say "probably" is that you have disconnected and reconnected the coil....so make sure the connection is simply not bad or you have a cut in the wiring somewhere.
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