I had a code 34, so I put in new MAF power and burnoff relays, I am also about the replace the CTS and the O2 looks new, I have a new one but it says to take teh old terminal off the old O2 and solider it on the end of the wire on the new ones use silver core solider?? What is that and what other sesnsors could be not working right and causing a rich problem, i at least of the injectors leak because i can hear the Fuel PSI leaving the rails when it is parked and then I have the floor it when i am starting it to "un flood it" not flooring it, causes an even longer crakning time, so i think the injectors are shot, but the new motor is going in 3 months with cleaned and blueprinted injectors, i was gonna replace all the sensors ne way so I figured that i would just install them to see if it helps, if not, oh well, i wanted them neway.
-Thanks

 

If the wire on the new O2 sensor is a foot or so long don't worry about silver-solder, just use regular solder if you need to swap connector ends.

The O2 sensor portion inside the exhaust pipe operates at 600deg F but the connecting wire is not near that temp.

 

Also could a 180 t stat make me run that much more rich then a 195?