have had a bucking and back firing prob inttermitanty for a while with no codes the other day it would start and shut off with a code p0601 replaced pcm/ ecm and then i had a code p1374 3x reff replaced plugs and wires starts and runs now alitte had starting but runns ok bucking and back fire still there and still no code. please help

 

by the way this is a 3.8l

 

had more electrical issues today installed another pcm/ecm will keep yall informed any sugestions are welcome

 

Coils or Ignition Control Module? Those are some funky codes that I cannot say I have heard of. Does your cruise control work?

 

yes cruise works bucking has been going on for allmost a year now off and on somtimes 2 or 3 times a day or not for a week or two

 

now by "bucking" what do you mean?
hesitating?
sputtering?
studdering?
bogging?
missing?


my guess is the oxygen sensor cant read properlyOR its the dis

 

hard hesitation

 

yea, im still riding with the O2 sensor or the DIS