code 219 won't go away

[Randall]

hey everybody,
I have a 92 MTX and I just can't get rid of code 219. I have checked the two spouts for continuity and both checked out fine. I have no idea why this code keeps popping up, but sometimes I am hearing random, small, backfires in the mufflers, and the exhaust smells gassy all of the time. Any help would be really appreciated!

 

[yamahaSHO]

Have you checked the lines down stream to see if they may have an open?

 

[Randall]

no, not completely. Do you mean check the wires all the way to the connectors?

 

[yamahaSHO]

Yes, trace the wire as far as you can.

 

[Randall]

well, I traced the wiring and found no problems, in fact some of this 12 year old wiring looks brand new! I don't really know what to do next, but I am starting to hear random "pops" in the exhaust, somewhere in the resonator or mufflers, and I think this may be related. I read in another thread that replacing the cam position sensor erases this code as does replacing the DIS module. Anyone know if that is true, or what else causes a code 219? Thanks for any help!