my truck missfires a little bit after it hits normal running temp, goes away after awhile, new plugs wires cap rotor coil, no check engine light, i need help thanks guys

 

'nother member from michigan. Welcome to DF.

How old is your O2 sensor? Might try just unplugging it, and see if the truck drives better.

 

Plug wires routed per TSB? https://dodgeforum.com/forum/2nd-gen-ram-faqs-diys-and-how-to-s/292412-tsb-18-48-98-proper-routing-of-spark-plug-wires.html

 

it has been doing this before i replaced the wires and every thing else but an hour ago i took out my stock kn air filter, i went and got a 7 dollar filter and the problem seemed not as pronounced or didnt miss as bad idk this is startin to chap my a$$$

 

So, are they reouted per TSB as kejobe mentioned? Were they routed correctly before?????

Never saw a misfire caused by an air filter....... But who knows? There is a saying, "there's a first time for everything!"

Unplug O2 sensor, or pull it out? I vote pull it out...

 

ill try the tsb and o2, but my buddy that is a cummins mech. said he was sure it was a fuel pump and come to think about it last summer befor the tranny gave out i only put 10 or 20 bucks in at a time so hell maybe that or just the fuel filter

 

I think fuel pump would cause stalling before misfire.......not 100% on that, but not my experience.

 

a restriced fuel filter CAN cause a misfire.

 

the hall effect module under the cap & rotor can cause as well

 

That is the cam sensor, and it can cause misfire. I think it would throw a code.