I'm doing them all because they need to be changed anyway and I haven't towed it to the shop yet

 

Well after all I ended up spending $397.68. Not too bad for re coil and all new spark plug and a tune up, she's running great too but still didn't get rid of the code... This darn p0171/p0174..

 

Just blew 3 myself in the past month ....doing a heli coil tomorrow on 1....stuffs getting old real quick

 

I am reasonably sure that those codes are from the oxy sensors and they most likely kicked on because of your miss fire. They should go off on their own in a few days if your truck is now running right.

 

Well I've had these codes since I've had the truck, so far I've replaced the DPFE sensor, egr rubber tubes, Pcv valve, iac control, cleaned throttle body and maf sensor... Going to look into replacing o2 sensors and check for a vacuum leak