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Check engine light coming on, ran the code it say cyn 5 misfire

Tiny
HOTROD1987
  • MEMBER
  • 1999 DODGE RAM
  • 141,000 MILES
I have a 1999 dodge ram 1500, I change the plugs, the wires and cap and rotor, now I still get a code saying cyn 5 misfire, I have changed the plug and the wire to that cyn, but still get it, any suggestions. Thanks
Saturday, November 5th, 2011 AT 2:26 PM

7 Replies

Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
So you changed stuff then cleared code and it came back?
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Saturday, November 5th, 2011 AT 4:17 PM
Tiny
HOTROD1987
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  • 3 POSTS
Yes the code comes back everytime, (cyn 5 misfire)
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Wednesday, November 9th, 2011 AT 2:59 PM
Tiny
FIXITMR
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What motor? Maybe injector/wiring/plug problem?
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Wednesday, November 9th, 2011 AT 8:43 PM
Tiny
HOTROD1987
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  • 3 POSTS
5.9 I have changed the plug and wire to cyn 5 twice know, I havent changed the injector. Should I move it to another cyn to see if it throws a code on that cyn?
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Thursday, November 10th, 2011 AT 6:09 AM
Tiny
DODGERAM15005.2
  • MEMBER
  • 1 POST
Try changing the plug wires next to cyn. 5. I have a 1997 Dodge Ram 1500 and the same thing happened to me and a friend of mine told me to change them. Since then I haven't had any problems with the check engine light coming back on after clearing the code. Fixitmr, would you have any idea why my truck would be skipping under a load? It only skips when going up a bridge. An old co-worker told me that it could be one of three problems.
1. Bad differential sensor or just needs to be cleaned.
2. Clogged fuel injectors.
3. Burnt valve.
Please let me know. I hope my answer helps you out also.
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Thursday, November 10th, 2011 AT 6:20 AM
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
I have read so many accounts of people with misfires and the cures it boggles the mind! Even new parts have been known to fail under load/pressure as they say. My own vehicle fell prey to a problem I just recently learned about online. Called crossfire where overlapping plug wires jump spark to each other under certain conditions of moisture and age. And buying GOOD replacement parts is becoming word of mouth knowledge from bad experiences! People have changed plugs 2 or 3 times before finding the right 1's for their vehicle that perform under all conditions without fail!
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Friday, November 11th, 2011 AT 3:37 AM
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
Sure, moving the injector sounds like a reasonable test of the injector itself.
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Friday, November 11th, 2011 AT 3:39 AM

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